Pub Date : 2024-11-12DOI: 10.1016/j.colsurfa.2024.135756
Muhammad Bilal , Zia Ur Rehman , Faheem K. Butt , Kewang Zheng , Chengyin Wang , Jianhua Hou
Simultaneous detection of ascorbic acid (AA), dopamine (DA), and uric acid (UA) is challenging due to close oxidation potential. These biomolecules lie in the human body and have significant roles in many psychological reactions. A slight change in the concentration of these molecules can cause serious health issues; in this context, accurate and timely detection holds significant value in clinical diagnostics. This work demonstrates the synthesis of 3D zinc nanomarbles on 2D graphene oxide sheets using a rapid and environmentally friendly microwave-assisted technique. The porous morphology with thin nanomarbles where (2 2 0) reactive sites were exposed to the environment with enhanced surface area measured 38.29 m2 g−1. The composite ZnVO/rGO has been employed on glassy carbon electrodes, resulting in superior electrocatalytic properties that enable the simultaneous detection of these analytes with wide potential gaps. Notably, the ZnVO/rGO/GCE exhibits simultaneous detection with a working range of AA (100 µM-1000 µM), DA (10 µM-100 µM), and UA (10 µM-100 µM). The detection limits were estimated to be 4.3 µM, 0.7 µM, and 0.32 µM, respectively. The ZnVO/rGO/GCE sensor demonstrates remarkable stability, selectivity, reproducibility, and satisfactory recovery during real sample analysis. The high surface area, porous nature, and thin size of 3D nanomarbles enhance charge transportation, making it promising for electrochemical performance. This study lays the foundation for future advancements in human health monitoring by introducing a novel approach.
{"title":"Facile microwave-assisted growth of 3D ZnVO nanomarbles on graphene oxide nanosheets for simultaneous detection of ascorbic acid, dopamine, and uric acid","authors":"Muhammad Bilal , Zia Ur Rehman , Faheem K. Butt , Kewang Zheng , Chengyin Wang , Jianhua Hou","doi":"10.1016/j.colsurfa.2024.135756","DOIUrl":"10.1016/j.colsurfa.2024.135756","url":null,"abstract":"<div><div>Simultaneous detection of ascorbic acid (AA), dopamine (DA), and uric acid (UA) is challenging due to close oxidation potential. These biomolecules lie in the human body and have significant roles in many psychological reactions. A slight change in the concentration of these molecules can cause serious health issues; in this context, accurate and timely detection holds significant value in clinical diagnostics. This work demonstrates the synthesis of 3D zinc nanomarbles on 2D graphene oxide sheets using a rapid and environmentally friendly microwave-assisted technique. The porous morphology with thin nanomarbles where (2 2 0) reactive sites were exposed to the environment with enhanced surface area measured 38.29 m<sup>2</sup> g<sup>−1</sup>. The composite ZnVO/rGO has been employed on glassy carbon electrodes, resulting in superior electrocatalytic properties that enable the simultaneous detection of these analytes with wide potential gaps. Notably, the ZnVO/rGO/GCE exhibits simultaneous detection with a working range of AA (100 µM-1000 µM), DA (10 µM-100 µM), and UA (10 µM-100 µM). The detection limits were estimated to be 4.3 µM, 0.7 µM, and 0.32 µM, respectively. The ZnVO/rGO/GCE sensor demonstrates remarkable stability, selectivity, reproducibility, and satisfactory recovery during real sample analysis. The high surface area, porous nature, and thin size of 3D nanomarbles enhance charge transportation, making it promising for electrochemical performance. This study lays the foundation for future advancements in human health monitoring by introducing a novel approach.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135756"},"PeriodicalIF":4.9,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-12DOI: 10.1016/j.colsurfa.2024.135754
Saravana Pandi Sivaji , Kiruthika Mariappan , Tse-Wei Chen , Shen-Ming Chen , Elayappan Tamilalagan , Ju-Ching Tsai , Subramanian Sakthinathan , Dunia A. Al Farraj , M. Ajmal Ali , Mohamed Soliman Elshikh
The detection of Carbendazim (CBZ) insecticides has prompted concerns regarding their potential impacts on both human health and the environment. To address this issue, a novel nanocomposite comprising Zinc Vanadate (ZVO) was prepared using a common hydrothermal technique and incorporated with multi-walled carbon nanotube (MWCNT) to form ZVO/MWCNT nanocomposite. Thus, a glassy carbon electrode (GCE) has been modified using this ZVO/MWCNT nanocomposite, which offering a simple and affordable platform for the electrochemical detection of CBZ. The structure and composition of the nanomaterial were confirmed through various microscopic and spectroscopic techniques, while its electrochemical characteristics were investigated using electrochemical impedance spectroscopy (EIS), differential pulse voltammetry (DPV), and cyclic voltammetry (CV) techniques. The GCE/ZVO/MWCNT modified electrode exhibited a broad linear response ranging from 0.05 to 110 μM, with a low detection limit of 0.005 μM and high sensitivity (2.93 μA μM−1 cm−2), with recoveries ranging from 98 % to 99.93 %, respectively. Moreover, GCE/ZVO/MWCNT electrode demonstrated excellent stability, repeatability, and practical utility for CBZ detection. Based on electrochemical studies that indicate the formation of oxidized products consistent with a 2-electron transfer process. Therefore, this innovative GCE/ZVO/MWCNT modified electrode offers promising prospects for sensitive and selective CBZ determination, with potential applications in environmental monitoring and health protection.
{"title":"Fabrication of an electrochemical sensor based on Zinc Vanadate anchored with multi-walled carbon nanotubes modified glassy carbon electrode for the determination of Carbendazim","authors":"Saravana Pandi Sivaji , Kiruthika Mariappan , Tse-Wei Chen , Shen-Ming Chen , Elayappan Tamilalagan , Ju-Ching Tsai , Subramanian Sakthinathan , Dunia A. Al Farraj , M. Ajmal Ali , Mohamed Soliman Elshikh","doi":"10.1016/j.colsurfa.2024.135754","DOIUrl":"10.1016/j.colsurfa.2024.135754","url":null,"abstract":"<div><div>The detection of Carbendazim (CBZ) insecticides has prompted concerns regarding their potential impacts on both human health and the environment. To address this issue, a novel nanocomposite comprising Zinc Vanadate (ZVO) was prepared using a common hydrothermal technique and incorporated with multi-walled carbon nanotube (MWCNT) to form ZVO/MWCNT nanocomposite. Thus, a glassy carbon electrode (GCE) has been modified using this ZVO/MWCNT nanocomposite, which offering a simple and affordable platform for the electrochemical detection of CBZ. The structure and composition of the nanomaterial were confirmed through various microscopic and spectroscopic techniques, while its electrochemical characteristics were investigated using electrochemical impedance spectroscopy (EIS), differential pulse voltammetry (DPV), and cyclic voltammetry (CV) techniques. The GCE/ZVO/MWCNT modified electrode exhibited a broad linear response ranging from 0.05 to 110 μM, with a low detection limit of 0.005 μM and high sensitivity (2.93 μA μM<sup>−1</sup> cm<sup>−2</sup>), with recoveries ranging from 98 % to 99.93 %, respectively. Moreover, GCE/ZVO/MWCNT electrode demonstrated excellent stability, repeatability, and practical utility for CBZ detection. Based on electrochemical studies that indicate the formation of oxidized products consistent with a 2-electron transfer process. Therefore, this innovative GCE/ZVO/MWCNT modified electrode offers promising prospects for sensitive and selective CBZ determination, with potential applications in environmental monitoring and health protection.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135754"},"PeriodicalIF":4.9,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-10DOI: 10.1016/j.colsurfa.2024.135741
Minki Sa , Zambaga Otgonbayar , Dahee Kang , Jungchul Noh , Suk Jekal , Jiwon Kim , Chang-Min Yoon
A novel LiDAR-detectable plate-like hollow black titanium dioxide (HbTiO2) is developed by recycling silicon sludge generated from silicon wafer sawing. By employing TiCl4 sol-gel synthesis, hydrofluoric acid etching, and NaBH4 reduction, the hollow-structured black TiO2 is successfully synthesized. Plate-like HbTiO2 readily mixed with hydrophilic varnish, owing to its inherent hydrophilic properties. With monolayer coating, HbTiO2-based paints exhibit the blackness (L* = 17.63) comparable to that of commercial black paints, indicating that NaBH4 successfully changed the color of TiO2 from white to black. In addition to its blackness, HbTiO2 exhibits a superior near-infrared (NIR) reflectance of ca. 26.8 R% at 905 nm, making it suitable for integration with the LiDAR systems used in autonomous vehicles. This high NIR reflectance ensures that HbTiO2 can effectively interact with the LiDAR sensors, attributing to the hollow structures and effective light reflection mechanism. Furthermore, the use of recycled silicon sludge not only offers a cost-effective alternative to traditional template materials but also promotes environmental sustainability by reducing solid waste. Our findings demonstrate the potential of HbTiO2 as an innovative and practical LiDAR-detectable black pigment, paving the way for advanced applications in autonomous vehicle technologies.
{"title":"Preparation of LiDAR-detectable black pigments via recycling the silicon sludge generated from the semiconductor manufacturing processes","authors":"Minki Sa , Zambaga Otgonbayar , Dahee Kang , Jungchul Noh , Suk Jekal , Jiwon Kim , Chang-Min Yoon","doi":"10.1016/j.colsurfa.2024.135741","DOIUrl":"10.1016/j.colsurfa.2024.135741","url":null,"abstract":"<div><div>A novel LiDAR-detectable plate-like hollow black titanium dioxide (HbTiO<sub>2</sub>) is developed by recycling silicon sludge generated from silicon wafer sawing. By employing TiCl<sub>4</sub> sol-gel synthesis, hydrofluoric acid etching, and NaBH<sub>4</sub> reduction, the hollow-structured black TiO<sub>2</sub> is successfully synthesized. Plate-like HbTiO<sub>2</sub> readily mixed with hydrophilic varnish, owing to its inherent hydrophilic properties. With monolayer coating, HbTiO<sub>2</sub>-based paints exhibit the blackness (<em>L</em>* = 17.63) comparable to that of commercial black paints, indicating that NaBH<sub>4</sub> successfully changed the color of TiO<sub>2</sub> from white to black. In addition to its blackness, HbTiO<sub>2</sub> exhibits a superior near-infrared (NIR) reflectance of <em>ca.</em> 26.8 <em>R</em>% at 905 nm, making it suitable for integration with the LiDAR systems used in autonomous vehicles. This high NIR reflectance ensures that HbTiO<sub>2</sub> can effectively interact with the LiDAR sensors, attributing to the hollow structures and effective light reflection mechanism. Furthermore, the use of recycled silicon sludge not only offers a cost-effective alternative to traditional template materials but also promotes environmental sustainability by reducing solid waste. Our findings demonstrate the potential of HbTiO<sub>2</sub> as an innovative and practical LiDAR-detectable black pigment, paving the way for advanced applications in autonomous vehicle technologies.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135741"},"PeriodicalIF":4.9,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-10DOI: 10.1016/j.colsurfa.2024.135747
Philipp Menold , Reinhard Strey , Ulf Olsson , Zoltan Takacs , Daniel Topgaard , Cosima Stubenrauch
Early studies on water - n-alkane - ionic surfactant microemulsions provide first hints for the possible existence of a foam-like nanostructure, i.e. a dense packing of polyhedral nanometer-sized water droplets separated by a thin layer of a continuous oil phase. Indeed, we found a foam-like structure in the system water/NaCl - hexyl methacrylate (C6MA) - dioctyl sulfosuccinate sodium salt (AOT). We were able to locate an isotropic one-phase channel, the L3 phase, emanating from the pseudo-binary system water/NaCl - AOT at ambient temperature and extending towards lower NaCl content with increasing oil content. We showed in our previous work that already upon addition of small amounts of oil to the L3 phase the conductivities become very low and the viscosities very high. Freeze fracture electron microscopy allowed us to visualize the anticipated foam-like nanostructure. To complement our previous work, we investigated the structural transition in the L3 channel by NMR self-diffusion measurements. The new data unambiguously confirm the existence of a foam-like structure. Based on this confirmation we offer an explanation for the topological transition to a foam-like structure, which one can also consider as a “super-swollen reverse micellar phase” – the first of its kind reported so far.
{"title":"Transition from a sponge-like to a foam-like nanostructure in a water-rich L3 phase: A confirmation","authors":"Philipp Menold , Reinhard Strey , Ulf Olsson , Zoltan Takacs , Daniel Topgaard , Cosima Stubenrauch","doi":"10.1016/j.colsurfa.2024.135747","DOIUrl":"10.1016/j.colsurfa.2024.135747","url":null,"abstract":"<div><div>Early studies on water - <em>n</em>-alkane - ionic surfactant microemulsions provide first hints for the possible existence of a foam-like nanostructure, <em>i.e.</em> a dense packing of polyhedral nanometer-sized water droplets separated by a thin layer of a continuous oil phase. Indeed, we found a foam-like structure in the system water/NaCl - hexyl methacrylate (C<sub>6</sub>MA) - dioctyl sulfosuccinate sodium salt (AOT). We were able to locate an isotropic one-phase channel, the L<sub>3</sub> phase, emanating from the pseudo-binary system water/NaCl - AOT at ambient temperature and extending towards lower NaCl content with increasing oil content. We showed in our previous work that already upon addition of small amounts of oil to the L<sub>3</sub> phase the conductivities become very low and the viscosities very high. Freeze fracture electron microscopy allowed us to visualize the anticipated foam-like nanostructure. To complement our previous work, we investigated the structural transition in the L<sub>3</sub> channel by NMR self-diffusion measurements. The new data unambiguously confirm the existence of a foam-like structure. Based on this confirmation we offer an explanation for the topological transition to a foam-like structure, which one can also consider as a “super-swollen reverse micellar phase” – the first of its kind reported so far.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135747"},"PeriodicalIF":4.9,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-09DOI: 10.1016/j.colsurfa.2024.135740
B. Ananda , B.R. Radha Krushna , S.C. Sharma , Kartik J. Salwe , Renu sharma , Priya Josson Akkara , A. Lovelin Jerald , J. Jayannan , K. Manjunatha , Sheng Yun Wu , H. Nagabhushana
In this study, a one-step microwave irradiation process combined with a sodium hydroxide (NaOH) solution allowed for the quick and easy synthesis of carbon dots (CDs) from eggshell membrane (ESM) ashes. The resultant CDs demonstrated exceptional selectivity for Fe3+ and excellent fluorescence (FL) with a quantum yield (QY) of 15.3 %. Utilizing synthetic CDs, a sensitive nanoprobe is utilized to identify free Fe3+ within the 0–350 μM (R2 = 0.9976) range, with a 0.281 μM limit of detection (LoD). Additionally, the CDs were shown to be useful for intracellular Fe3+ detection applications because of their low cytotoxicity and biocompatibility. Investigations using real samples at 475 nm excitation wavelength showed promising results in terms of real-world application. In order to transform molecular data into FL signal outputs, a multi-input logic gate is also constructed. In the UV-A (93 %), UV-B (88 %), UV-C (98 %) and high energy blue light (HEBL) (79 %) regions, blue colour-emitting CDs had the maximum UV blockage, but pure polyvinyl alcohol (PVA) absorbed less than 22–30 % of the light in all UV regions. The integration of CDs into the polymer improved the thermal characteristics of the PVA film. Additionally, testing of in vitro cell viability demonstrated that the CDs, when embedded in the PVA, did not cause cytotoxicity to the Neuroblastoma cell line (SH-SY-5Y). As a paradigm for perishable commodities, the effects of CDs and PVA were assessed on the shelf life of tomatoes. When fresh tomatoes were coated with CDs@PVA and PVA, weight and moisture loss were effectively decreased, according to the results of the long-term monitoring study. Throughout almost 36 days at room temperature, it also dramatically reduced the growth of fungi and prevented spoiling, all the while maintaining the fruits original colour and appearance. The CDs FL under 365 nm UV light excitation makes them well-suited for creating fluorescent inks to deter counterfeiting. Additionally, the study explored the CDs exceptional FL properties for use as a luminescent fingerprint powder, aiding in the detection of latent fingerprints (LFPs) on various surfaces. The findings from this study highlight the potential of cost-effective and safe CDs for a range of applications, including non-cytotoxic UV blocking, active packaging, Fe3+ sensing, fingerprint detection, anti-counterfeiting (AC) measures and flexible nanocomposite (NC) films.
{"title":"Microwave enhanced carbon dots synthesis from eggshell membrane: Versatile applications in heavy metal ion sensing, strain free detection of fingerprints, UV shielding, food packing and anti-counterfeiting","authors":"B. Ananda , B.R. Radha Krushna , S.C. Sharma , Kartik J. Salwe , Renu sharma , Priya Josson Akkara , A. Lovelin Jerald , J. Jayannan , K. Manjunatha , Sheng Yun Wu , H. Nagabhushana","doi":"10.1016/j.colsurfa.2024.135740","DOIUrl":"10.1016/j.colsurfa.2024.135740","url":null,"abstract":"<div><div>In this study, a one-step microwave irradiation process combined with a sodium hydroxide (NaOH) solution allowed for the quick and easy synthesis of carbon dots (CDs) from eggshell membrane (ESM) ashes. The resultant CDs demonstrated exceptional selectivity for Fe<sup>3+</sup> and excellent fluorescence (FL) with a quantum yield (QY) of 15.3 %. Utilizing synthetic CDs, a sensitive nanoprobe is utilized to identify free Fe<sup>3+</sup> within the 0–350 μM (R<sup>2</sup> = 0.9976) range, with a 0.281 μM limit of detection (LoD). Additionally, the CDs were shown to be useful for intracellular Fe<sup>3+</sup> detection applications because of their low cytotoxicity and biocompatibility. Investigations using real samples at 475 nm excitation wavelength showed promising results in terms of real-world application. In order to transform molecular data into FL signal outputs, a multi-input logic gate is also constructed. In the UV-A (93 %), UV-B (88 %), UV-C (98 %) and high energy blue light (HEBL) (79 %) regions, blue colour-emitting CDs had the maximum UV blockage, but pure polyvinyl alcohol (PVA) absorbed less than 22–30 % of the light in all UV regions. The integration of CDs into the polymer improved the thermal characteristics of the PVA film. Additionally, testing of in vitro cell viability demonstrated that the CDs, when embedded in the PVA, did not cause cytotoxicity to the Neuroblastoma cell line (SH-SY-5Y). As a paradigm for perishable commodities, the effects of CDs and PVA were assessed on the shelf life of tomatoes. When fresh tomatoes were coated with CDs@PVA and PVA, weight and moisture loss were effectively decreased, according to the results of the long-term monitoring study. Throughout almost 36 days at room temperature, it also dramatically reduced the growth of fungi and prevented spoiling, all the while maintaining the fruits original colour and appearance. The CDs FL under 365 nm UV light excitation makes them well-suited for creating fluorescent inks to deter counterfeiting. Additionally, the study explored the CDs exceptional FL properties for use as a luminescent fingerprint powder, aiding in the detection of latent fingerprints (LFPs) on various surfaces. The findings from this study highlight the potential of cost-effective and safe CDs for a range of applications, including non-cytotoxic UV blocking, active packaging, Fe<sup>3+</sup> sensing, fingerprint detection, anti-counterfeiting (AC) measures and flexible nanocomposite (NC) films.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135740"},"PeriodicalIF":4.9,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The need of achieving low-impact and low-cost functional materials through sustainable and efficient methodologies is one of the goals of the current research in the field of materials science and energy storage. In this study, a new facile route for obtaining battery-like electrode Bi-based films is presented. Specifically, ∼1.3 μm-thick β-Bi2O3 films were prepared from oxynitrate via a simple sol-gel/elution process upon titanium foils, followed by annealing in forming gas at 350°C. A multi-technique approach, involving Raman, X-ray Photoelectron Spectroscopy, X-ray Diffraction, Scanning Electron Microscopy and optical characterization, demonstrates the formation of a nanocrystalline porous bismuth oxide (20–30 nm in size) consisting of β-Bi2O3 phase with the crucial presence of Bi0. Annealing at 350°C in different environments (i.e. air and N2), do not produce crystalline phases. The reported method improves the synthesis of β-Bi2O3 phase through a ∼1.3 μm-thick film realization and a controlled phase production by reactive annealing at moderate temperatures. Cyclic Voltammetry and Galvanostatic Charge Discharge analyses reveal a double-redox behaviour for the β-Bi2O3 /Bi0 battery electrode with a specific capacity (capacitance) of 195 mA*h/g (350 F/g) at 0.5 A/g. The data highlight the promising usage of sol-gel/elution for the realization of ∼1.3 μm-thick film for energy storage applications.
{"title":"Highly efficient β-Bi2O3/Bi battery electrodes by reactive annealing from sol-gel precursors","authors":"Giovanna Pellegrino , Giacometta Mineo , Vincenzina Strano , Gianluca Marcellino , Luca Pulvirenti , Federico Ursino , Salvatore Mirabella , Guglielmo G. Condorelli","doi":"10.1016/j.colsurfa.2024.135738","DOIUrl":"10.1016/j.colsurfa.2024.135738","url":null,"abstract":"<div><div>The need of achieving low-impact and low-cost functional materials through sustainable and efficient methodologies is one of the goals of the current research in the field of materials science and energy storage. In this study, a new facile route for obtaining battery-like electrode Bi-based films is presented. Specifically, ∼1.3 μm-thick β-Bi<sub>2</sub>O<sub>3</sub> films were prepared from oxynitrate via a simple sol-gel/elution process upon titanium foils, followed by annealing in forming gas at 350°C. A multi-technique approach, involving Raman, X-ray Photoelectron Spectroscopy, X-ray Diffraction, Scanning Electron Microscopy and optical characterization, demonstrates the formation of a nanocrystalline porous bismuth oxide (20–30 nm in size) consisting of β-Bi<sub>2</sub>O<sub>3</sub> phase with the crucial presence of Bi<sup>0</sup>. Annealing at 350°C in different environments (i.e. air and N<sub>2</sub>), do not produce crystalline phases. The reported method improves the synthesis of β-Bi<sub>2</sub>O<sub>3</sub> phase through a ∼1.3 μm-thick film realization and a controlled phase production by reactive annealing at moderate temperatures. Cyclic Voltammetry and Galvanostatic Charge Discharge analyses reveal a double-redox behaviour for the β-Bi<sub>2</sub>O<sub>3</sub> /Bi<sup>0</sup> battery electrode with a specific capacity (capacitance) of 195 mA*h/g (350 F/g) at 0.5 A/g. The data highlight the promising usage of sol-gel/elution for the realization of ∼1.3 μm-thick film for energy storage applications.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135738"},"PeriodicalIF":4.9,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-08DOI: 10.1016/j.colsurfa.2024.135745
Guangguang Guan , Xiaoqiang Li , Jiebai Li , Lin Ma , Yangtao Zhou
Developing strong electromagnetic (EM) wave absorbing materials to solve the issue of EM radiation emanating from electronic devices in low-frequency range remains currently a great challenge. The majority of current solutions in low-frequency range are based on magnetic absorbent. However, this approach is constrained by the poor impedance matching, high production cost and limited absorption bandwidth. Herein, the novel reproducible cellulose-derived flawed graphite carbon material (represented as CFGC) was prepared by chemical and following simple carbonization method. Besides, the unique defect structure and the mechanism underlying microwave absorption (MA) are elaborated in detail. By fine-tuning the content of CFGC, the MA property is optimized. The minimum reflection loss (RLmin) of 50 wt% filling for CFGC is –42.08 dB at 4.08 GHz, showing an excellent MA property within the low-frequency range of C bands. Thus, the novel CFGC in this study provides a new and convenient way to solve low-frequency EM pollution.
开发强电磁波吸收材料以解决电子设备在低频范围内产生的电磁辐射问题，目前仍是一项巨大的挑战。目前大多数低频范围的解决方案都是基于磁性吸波材料。然而，这种方法受到阻抗匹配性差、生产成本高和吸收带宽有限的限制。在此，我们采用化学方法和简单的碳化法制备了新型可重复的纤维素衍生缺陷石墨碳材料（简称 CFGC）。此外，还详细阐述了其独特的缺陷结构和微波吸收（MA）机理。通过微调 CFGC 的含量，微波吸收特性得到了优化。当 CFGC 的填充量为 50 wt% 时，其在 4.08 GHz 频率下的最小反射损耗（RLmin）为 -42.08 dB，这表明其在 C 波段的低频范围内具有出色的 MA 特性。因此，本研究中的新型 CFGC 为解决低频电磁污染提供了一种新的便捷方法。
{"title":"Facile fabrication of cellulose-derived flawed graphite carbon with low-frequency minimum reflection loss in the C bands","authors":"Guangguang Guan , Xiaoqiang Li , Jiebai Li , Lin Ma , Yangtao Zhou","doi":"10.1016/j.colsurfa.2024.135745","DOIUrl":"10.1016/j.colsurfa.2024.135745","url":null,"abstract":"<div><div>Developing strong electromagnetic (EM) wave absorbing materials to solve the issue of EM radiation emanating from electronic devices in low-frequency range remains currently a great challenge. The majority of current solutions in low-frequency range are based on magnetic absorbent. However, this approach is constrained by the poor impedance matching, high production cost and limited absorption bandwidth. Herein, the novel reproducible cellulose-derived flawed graphite carbon material (represented as CFGC) was prepared by chemical and following simple carbonization method. Besides, the unique defect structure and the mechanism underlying microwave absorption (MA) are elaborated in detail. By fine-tuning the content of CFGC, the MA property is optimized. The minimum reflection loss (RL<sub>min</sub>) of 50 wt% filling for CFGC is –42.08 dB at 4.08 GHz, showing an excellent MA property within the low-frequency range of C bands. Thus, the novel CFGC in this study provides a new and convenient way to solve low-frequency EM pollution.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135745"},"PeriodicalIF":4.9,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-08DOI: 10.1016/j.colsurfa.2024.135713
Mengzhu Li , Yiwei Pan , Sydney Ntshole , Zixun Li , Shusu Shen , Ganwei Zhang
Covalent organic frameworks (COFs) have advantages such as easy functionalization, abundant regular pores, low density, and are widely used in the preparation of membrane materials. In this study, the well-grown COF-LZU1 (LZU for Lanzhou University)/polyvinylidene fluoride (PVDF) loose nanofiltration (NF) composite membranes were prepared through oligomer-triggered interfacial polymerization (OT-IP) at room temperature. Due to its pore size of 1.72 nm, the prepared COF-LZU1/PVDF membrane not only exhibited an ultra-high rejection for dyes (99.4 % for Methyl blue, 99.7 % for Congo red, and 99.1 % for Eriochrome black T). In addition, the filtration experiment of the mixed CR/NaCl solution showed a dye/salt selectivity factor of 328.7, as well as a permeance of 77.0 L·m−2·h−1·bar−1 and a high pure water permeability of 112.3 L·m−2·h−1·bar−1. A continuous filtration experiment showed that the COF-LZU1/PVDF membrane exhibited excellent operational stability. The findings suggest that COF-LZU1/PVDF membrane show promise for use in separating dyes and salts.
{"title":"Fabrication of COF-LZU1/PVDF composite loose nanofiltration membranes through oligomer-triggered interfacial polymerization (OT-IP) for highly efficient dye/salt separation","authors":"Mengzhu Li , Yiwei Pan , Sydney Ntshole , Zixun Li , Shusu Shen , Ganwei Zhang","doi":"10.1016/j.colsurfa.2024.135713","DOIUrl":"10.1016/j.colsurfa.2024.135713","url":null,"abstract":"<div><div>Covalent organic frameworks (COFs) have advantages such as easy functionalization, abundant regular pores, low density, and are widely used in the preparation of membrane materials. In this study, the well-grown COF-LZU1 (LZU for Lanzhou University)/polyvinylidene fluoride (PVDF) loose nanofiltration (NF) composite membranes were prepared through oligomer-triggered interfacial polymerization (OT-IP) at room temperature. Due to its pore size of 1.72 nm, the prepared COF-LZU1/PVDF membrane not only exhibited an ultra-high rejection for dyes (99.4 % for Methyl blue, 99.7 % for Congo red, and 99.1 % for Eriochrome black T). In addition, the filtration experiment of the mixed CR/NaCl solution showed a dye/salt selectivity factor of 328.7, as well as a permeance of 77.0 L·m<sup>−2</sup>·h<sup>−1</sup>·bar<sup>−1</sup> and a high pure water permeability of 112.3 L·m<sup>−2</sup>·h<sup>−1</sup>·bar<sup>−1</sup>. A continuous filtration experiment showed that the COF-LZU1/PVDF membrane exhibited excellent operational stability. The findings suggest that COF-LZU1/PVDF membrane show promise for use in separating dyes and salts.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135713"},"PeriodicalIF":4.9,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-08DOI: 10.1016/j.colsurfa.2024.135723
Lingqi Zeng , Haibo Liu , Hao Zhang , Wentao Xiong , Chengxin Wang , Kuo Liu , Yongqing Wang
In order to reveal the ice adhesion mechanism, this study proposes an ice/workpiece interface strain picking method and establishes a coupled numerical model of water phase change heat transfer and mechanics. The interfacial strain law of the workpiece surface with/without water during the water freezing process was investigated, and the time development characteristics of the water freezing interfacial strain were analysed. The results show that the water freezing interface strain goes through a rapid increase during the rapid cooling stage of water, a strain fluctuation stage under the mixed state of ice and water, and a stabilisation stage after the completion of the phase transformation. As the cooling temperature decreases, the strain generated by water in the subcooled state is gradually larger than the strain of the workpiece contracted at low temperature, the trend of water phase transformation and volume increase is more and more significant, and the maximum freezing interfacial strain on the surface of the workpiece increases gradually. The interfacial strains and deformations of different materials show similar trends, but there are differences in the frozen interfacial strains, which are related to the modulus of elasticity and coefficient of thermal expansion of the materials. The results of this study can help to understand the adhesion mechanism of ice on the material surface, and provide a reference for the engineering field in terms of anti-icing, de-icing and icing.
{"title":"Characteristics of time series development and formation mechanism of icing interface strain under three-dimensional freezing conditions","authors":"Lingqi Zeng , Haibo Liu , Hao Zhang , Wentao Xiong , Chengxin Wang , Kuo Liu , Yongqing Wang","doi":"10.1016/j.colsurfa.2024.135723","DOIUrl":"10.1016/j.colsurfa.2024.135723","url":null,"abstract":"<div><div>In order to reveal the ice adhesion mechanism, this study proposes an ice/workpiece interface strain picking method and establishes a coupled numerical model of water phase change heat transfer and mechanics. The interfacial strain law of the workpiece surface with/without water during the water freezing process was investigated, and the time development characteristics of the water freezing interfacial strain were analysed. The results show that the water freezing interface strain goes through a rapid increase during the rapid cooling stage of water, a strain fluctuation stage under the mixed state of ice and water, and a stabilisation stage after the completion of the phase transformation. As the cooling temperature decreases, the strain generated by water in the subcooled state is gradually larger than the strain of the workpiece contracted at low temperature, the trend of water phase transformation and volume increase is more and more significant, and the maximum freezing interfacial strain on the surface of the workpiece increases gradually. The interfacial strains and deformations of different materials show similar trends, but there are differences in the frozen interfacial strains, which are related to the modulus of elasticity and coefficient of thermal expansion of the materials. The results of this study can help to understand the adhesion mechanism of ice on the material surface, and provide a reference for the engineering field in terms of anti-icing, de-icing and icing.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135723"},"PeriodicalIF":4.9,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142654021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-08DOI: 10.1016/j.colsurfa.2024.135742
Shujunwen Gao , Xiaolin Qiu
Pickering emulsions (PEs) loaded with essential oils have proven to be a promising delivery system in food preservation, thus attracting increasing research attention. In this study, epigallocatechin gallate (EGCG) enhanced whey protein isolate(WPI)-gum Arabic(GA) ternary spherical nanocomplex (WGE) was fabricated by thermal and pH double-induced method and used to stabilize antibacterial, antioxidant and sustained release Pickering emulsions loaded with cinnamaldehyde. The WGE nanocomplex exhibited biphasic surface wettability (78.2±2.8°), 1.73 times that of WPI, as well as outstanding interfacial tension (5.60 mN/m), 44.6 % lower than that of WPI-GA, mainly due to the electrostatic interactions between WPI and GA and enhanced surface hydrophobicity causing by EGCG, indicating its superb ability to stabilize Pickering emulsions. Using WGE nanocomplex as the Pickering emulsion stabilizer, PEs template was constructed. Confocal laser scanning microscopy (CLSM) showed the formation of a dense oil-water interface layer and gel-like network structure, which demonstrated good storage stability against creaming and coalescence, benefiting to cinnamaldehyde encapsulation. Finally, cinnamaldehyde was encapsulated effectively using this PEs pattern with high encapsulation efficiency under different conditions. The cinnamaldehyde Pickering emulsions (CPEs) demonstrated superior antioxidant ability against DPPH (>85 %) and ABTS (>78 %), as well as effective antibacterial capability against E. coli (>99.9999 %) and S. aureus (>99.99 %) than pure cinnamaldehyde. Moreover, CPEs showed slow sustained-release ability, which could satisfyingly prolong the biological activity of cinnamaldehyde. Therefore, the WGE stabilized cinnamaldehyde Pickering emulsions fabricated in this work might provide a promising alternative for the delivery of antibacterial and controlled release essential oils in the food industry.
{"title":"Development of gel-like, high encapsulation efficiency and antibacterial cinnamaldehyde-loaded Pickering emulsion stabilized by EGCG enhanced whey protein isolate-gum arabic ternary nanocomplex","authors":"Shujunwen Gao , Xiaolin Qiu","doi":"10.1016/j.colsurfa.2024.135742","DOIUrl":"10.1016/j.colsurfa.2024.135742","url":null,"abstract":"<div><div>Pickering emulsions (PEs) loaded with essential oils have proven to be a promising delivery system in food preservation, thus attracting increasing research attention. In this study, epigallocatechin gallate (EGCG) enhanced whey protein isolate(WPI)-gum Arabic(GA) ternary spherical nanocomplex (WGE) was fabricated by thermal and pH double-induced method and used to stabilize antibacterial, antioxidant and sustained release Pickering emulsions loaded with cinnamaldehyde. The WGE nanocomplex exhibited biphasic surface wettability (78.2±2.8°), 1.73 times that of WPI, as well as outstanding interfacial tension (5.60 mN/m), 44.6 % lower than that of WPI-GA, mainly due to the electrostatic interactions between WPI and GA and enhanced surface hydrophobicity causing by EGCG, indicating its superb ability to stabilize Pickering emulsions. Using WGE nanocomplex as the Pickering emulsion stabilizer, PEs template was constructed. Confocal laser scanning microscopy (CLSM) showed the formation of a dense oil-water interface layer and gel-like network structure, which demonstrated good storage stability against creaming and coalescence, benefiting to cinnamaldehyde encapsulation. Finally, cinnamaldehyde was encapsulated effectively using this PEs pattern with high encapsulation efficiency under different conditions. The cinnamaldehyde Pickering emulsions (CPEs) demonstrated superior antioxidant ability against DPPH (>85 %) and ABTS (>78 %), as well as effective antibacterial capability against <em>E. coli</em> (>99.9999 %) and <em>S. aureus</em> (>99.99 %) than pure cinnamaldehyde. Moreover, CPEs showed slow sustained-release ability, which could satisfyingly prolong the biological activity of cinnamaldehyde. Therefore, the WGE stabilized cinnamaldehyde Pickering emulsions fabricated in this work might provide a promising alternative for the delivery of antibacterial and controlled release essential oils in the food industry.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135742"},"PeriodicalIF":4.9,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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