Pub Date : 2024-08-23DOI: 10.1016/j.mtchem.2024.102251
Zhaomeng Liu, Shangzhuo Li, Jianjia Mu, Lu-Kang Zhao, Xuan-Wen Gao, Qinfen Gu, Xuan-Chen Wang, Hong Chen, Wen-Bin Luo
Potassium-ion batteries (PIBs) are emerging as a promising next-generation energy storage system due to their high economic efficiency and theoretical energy density. Among various cathode materials, KMnO-based cathode materials have garnered significant attention due to their high energy density and industrial feasibility. In this work, A P3-type KMnCrO cathode material was synthesized using a target-elements tailoring quenching method. By strategically substituting targeted elements and employing tailored quenching techniques, it can effectively alleviate Jahn-Teller distortion and suppress phase transitions, enhancing the material structural stability. The synthesized KMnCrO cathode material demonstrated excellent cycling stability of retaining 70 % specific capacity after 300 cycles at a current density of 500 mA g. This work breaks out the traditional solid-phase sintering preparation method and provides a new solution for the future preparation of other structurally stable high-performance layered oxides with excellent rate performance for potassium ion batteries.
{"title":"Element-tailored quenching methods: Phase-defective K0.5Mn1-xCrxO2 cathode materials for potassium ion batteries","authors":"Zhaomeng Liu, Shangzhuo Li, Jianjia Mu, Lu-Kang Zhao, Xuan-Wen Gao, Qinfen Gu, Xuan-Chen Wang, Hong Chen, Wen-Bin Luo","doi":"10.1016/j.mtchem.2024.102251","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102251","url":null,"abstract":"Potassium-ion batteries (PIBs) are emerging as a promising next-generation energy storage system due to their high economic efficiency and theoretical energy density. Among various cathode materials, KMnO-based cathode materials have garnered significant attention due to their high energy density and industrial feasibility. In this work, A P3-type KMnCrO cathode material was synthesized using a target-elements tailoring quenching method. By strategically substituting targeted elements and employing tailored quenching techniques, it can effectively alleviate Jahn-Teller distortion and suppress phase transitions, enhancing the material structural stability. The synthesized KMnCrO cathode material demonstrated excellent cycling stability of retaining 70 % specific capacity after 300 cycles at a current density of 500 mA g. This work breaks out the traditional solid-phase sintering preparation method and provides a new solution for the future preparation of other structurally stable high-performance layered oxides with excellent rate performance for potassium ion batteries.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"10 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204502","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}
Bacterial infections result in serious impacts on human health. Non-toxic, potent, and flexible antimicrobial particles loaded onto nonwoven materials offer a promising solution. Metallic antimicrobial particles have achieved significant attention and application; however, common materials such as silver and copper exhibit potential toxicity and typically employ a singular antimicrobial mechanism. This limitation can diminish their effectiveness over the service cycle. In our research gallium (Ga), known for its activity and versatile antimicrobial mechanisms, was employed with ferrous ions (Fe), which offer broad-spectrum antimicrobial properties and lower potential toxicity compared to silver and copper. Through spontaneous substitution reaction. Ga and Fe can generate Ga–Fe alloys and various antimicrobial particles. In this study, we developed antimicrobial nonwovens by loading them with multiple types of metal antimicrobial particles through a simple soaking and surface treatment process. The multifaceted antimicrobial mechanisms introduced by these multiple particles provide the nonwoven materials with exceptional antimicrobial performance, achieving an effectiveness of up to 99.99 % against and . The feasibility of the substitution reaction between Ga and Fe was thoroughly verified through theoretical calculations, X-ray photoelectron spectroscopy (XPS) characterization, and experimental observations. This research offers valuable insights for advancing and exploring antimicrobial nonwoven materials.
{"title":"Crafting and analyzing nonwovens enhanced with antimicrobial metal particles and diverse mechanisms via substitution reaction","authors":"Bing-Bing Shou, Ting-Ting Li, Xian-Jin Hu, Guo-Hua Liu, Hai-Tao Ren, Jia-Horng Lin, Jingwei Xie, Li-Yan Liu, Ching-Wen Lou","doi":"10.1016/j.mtchem.2024.102260","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102260","url":null,"abstract":"Bacterial infections result in serious impacts on human health. Non-toxic, potent, and flexible antimicrobial particles loaded onto nonwoven materials offer a promising solution. Metallic antimicrobial particles have achieved significant attention and application; however, common materials such as silver and copper exhibit potential toxicity and typically employ a singular antimicrobial mechanism. This limitation can diminish their effectiveness over the service cycle. In our research gallium (Ga), known for its activity and versatile antimicrobial mechanisms, was employed with ferrous ions (Fe), which offer broad-spectrum antimicrobial properties and lower potential toxicity compared to silver and copper. Through spontaneous substitution reaction. Ga and Fe can generate Ga–Fe alloys and various antimicrobial particles. In this study, we developed antimicrobial nonwovens by loading them with multiple types of metal antimicrobial particles through a simple soaking and surface treatment process. The multifaceted antimicrobial mechanisms introduced by these multiple particles provide the nonwoven materials with exceptional antimicrobial performance, achieving an effectiveness of up to 99.99 % against and . The feasibility of the substitution reaction between Ga and Fe was thoroughly verified through theoretical calculations, X-ray photoelectron spectroscopy (XPS) characterization, and experimental observations. This research offers valuable insights for advancing and exploring antimicrobial nonwoven materials.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"9 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204501","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 impact of chemical structure and environment on the thermal stability of polyimide (PI) was examined, and the degradation mechanism was determined using a combination of experiments and molecular simulations. Changes in mechanical properties and thermogravimetric analysis (TGA) were used to characterize the thermal stability of PI. Pyrolysis gas chromatography mass spectrometry (Py-GCMS) and thermogravimetric-infrared spectroscopy (TG-IR) were used to analyze the degradation products both qualitatively and quantitatively. Molecular simulation was employed to analyze the primary bond breakage and thermal degradation pathways of PI, as well as to investigate the effects of the chemical structure, atmosphere, and temperature on degradation properties. The findings indicated that p-benzene-structured 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA)/-phenylenediamine (PDA) has the best thermal stability, whereas weak bonds like C–O–C in 4,4′-oxydianiline (ODA) and C–N in the 2-(4-aminophenyl)-1H-benzimidazol-5-amine (BIA) imidazole group decrease thermal stability. The formation path of low molecular weight products (CO, CO, HCN, and NH) and the potential degradation mechanism of PI were proposed. The process of PI thermal degradation accelerated by oxygen and high temperature was observed at the atomic level. Taken together, this work offers the possibility of monitoring the structural evolution of PI degradation process in real-time.
通过实验和分子模拟相结合的方法，研究了化学结构和环境对聚酰亚胺（PI）热稳定性的影响，并确定了降解机制。机械性能的变化和热重分析（TGA）被用来表征聚酰亚胺的热稳定性。热解气相色谱质谱法（Py-GCMS）和热重-红外光谱法（TG-IR）用于定性和定量分析降解产物。采用分子模拟分析了 PI 的主键断裂和热降解途径，并研究了化学结构、气氛和温度对降解特性的影响。研究结果表明，对苯结构的 3,3′,4,4′-联苯四羧酸二酐（BPDA）/苯二胺（PDA）具有最好的热稳定性，而 4,4′-氧二苯胺（ODA）中的 C-O-C 和 2-（4-氨基苯基）-1H-苯并咪唑-5-胺（BIA）咪唑基团中的 C-N 等弱键则会降低热稳定性。提出了 PI 的低分子量产物（CO、CO、HCN 和 NH）的形成路径和潜在降解机制。在原子水平上观察到氧气和高温加速了 PI 的热降解过程。综上所述，这项工作为实时监测 PI 降解过程的结构演变提供了可能。
{"title":"Effect of chemical structures and environmental factors on the thermal degradation mechanism of polyimide: Experiments and molecular dynamics simulations","authors":"Shiqin Xu, Daolei Lin, Runyue Li, Jiayu Zhan, Guofeng Tian, Dezhen Wu","doi":"10.1016/j.mtchem.2024.102242","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102242","url":null,"abstract":"The impact of chemical structure and environment on the thermal stability of polyimide (PI) was examined, and the degradation mechanism was determined using a combination of experiments and molecular simulations. Changes in mechanical properties and thermogravimetric analysis (TGA) were used to characterize the thermal stability of PI. Pyrolysis gas chromatography mass spectrometry (Py-GCMS) and thermogravimetric-infrared spectroscopy (TG-IR) were used to analyze the degradation products both qualitatively and quantitatively. Molecular simulation was employed to analyze the primary bond breakage and thermal degradation pathways of PI, as well as to investigate the effects of the chemical structure, atmosphere, and temperature on degradation properties. The findings indicated that p-benzene-structured 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA)/-phenylenediamine (PDA) has the best thermal stability, whereas weak bonds like C–O–C in 4,4′-oxydianiline (ODA) and C–N in the 2-(4-aminophenyl)-1H-benzimidazol-5-amine (BIA) imidazole group decrease thermal stability. The formation path of low molecular weight products (CO, CO, HCN, and NH) and the potential degradation mechanism of PI were proposed. The process of PI thermal degradation accelerated by oxygen and high temperature was observed at the atomic level. Taken together, this work offers the possibility of monitoring the structural evolution of PI degradation process in real-time.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"407 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204503","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 : 2024-08-22DOI: 10.1016/j.mtchem.2024.102266
Gege Shi, Jiuming Xiong, Weijun Wu, Zhiyong Guo, Sui Wang, Jie Mao
Hydrogels have received much attention in the field of flexible electronics as materials with flexibility and multifunctionality. The mechanical strength of conventional hydrogels is usually difficult to meet the requirements of practical applications in electronic devices. How to fabricate a high-strength hydrogel should remain a challenge. Here, a strategy to enhance the mechanical properties of conductive hydrogels based on the Hofmeister effect is reported. The mechanical properties of hydrogels were enhanced by increasing the polymer chain density, enhancing the hydrophobicity and increasing the crystallinity, the high-strength and high-toughness polyvinyl alcohol/carbon nanotubes/polyethyleneimine (PVA/MWCNTs/PEI) conductive hydrogel was successfully produced. The ultimate stress of the hydrogel was as high as 3.5–6.3 MPa, the elongation at break was between 500 and 1200 %, and the toughness was up to 23.62 MJ/m. The conductivity of high-strength, high-toughness hydrogel is 0.05–0.45 S/m. Hydrogel was manufactured into a single-electrode friction nanogenerator (TENG), and it can easily light up to 100 LEDs. Therefore, this high-strength and high-toughness conductive hydrogel has great potential for TENG applications, offering the possibility of extending the working life of TENG in harsh environments.
水凝胶作为具有柔韧性和多功能性的材料，在柔性电子学领域备受关注。传统水凝胶的机械强度通常难以满足电子设备实际应用的要求。如何制造高强度水凝胶仍是一个挑战。本文报告了一种基于霍夫迈斯特效应增强导电水凝胶机械性能的策略。通过增加聚合物链密度、提高疏水性和增加结晶度来增强水凝胶的力学性能，成功制备出了高强度、高韧性的聚乙烯醇/碳纳米管/聚乙烯亚胺（PVA/MWCNTs/PEI）导电水凝胶。水凝胶的极限应力高达 3.5-6.3 MPa，断裂伸长率在 500-1200 % 之间，韧性高达 23.62 MJ/m。高强度、高韧性水凝胶的电导率为 0.05-0.45 S/m。将水凝胶制成单电极摩擦纳米发电机（TENG），可轻松点亮多达 100 个 LED。因此，这种高强度和高韧性导电水凝胶在 TENG 应用中具有巨大潜力，为延长 TENG 在恶劣环境中的工作寿命提供了可能。
{"title":"High-strength conductive hydrogels based on the Hofmeister effect for friction nanogenerators","authors":"Gege Shi, Jiuming Xiong, Weijun Wu, Zhiyong Guo, Sui Wang, Jie Mao","doi":"10.1016/j.mtchem.2024.102266","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102266","url":null,"abstract":"Hydrogels have received much attention in the field of flexible electronics as materials with flexibility and multifunctionality. The mechanical strength of conventional hydrogels is usually difficult to meet the requirements of practical applications in electronic devices. How to fabricate a high-strength hydrogel should remain a challenge. Here, a strategy to enhance the mechanical properties of conductive hydrogels based on the Hofmeister effect is reported. The mechanical properties of hydrogels were enhanced by increasing the polymer chain density, enhancing the hydrophobicity and increasing the crystallinity, the high-strength and high-toughness polyvinyl alcohol/carbon nanotubes/polyethyleneimine (PVA/MWCNTs/PEI) conductive hydrogel was successfully produced. The ultimate stress of the hydrogel was as high as 3.5–6.3 MPa, the elongation at break was between 500 and 1200 %, and the toughness was up to 23.62 MJ/m. The conductivity of high-strength, high-toughness hydrogel is 0.05–0.45 S/m. Hydrogel was manufactured into a single-electrode friction nanogenerator (TENG), and it can easily light up to 100 LEDs. Therefore, this high-strength and high-toughness conductive hydrogel has great potential for TENG applications, offering the possibility of extending the working life of TENG in harsh environments.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"5 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204517","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}
Traditional white light-emitting diode (WLED) is mainly depending on coating broadband yellow phosphors (520–700 nm) on blue emitting LED chip (440–460). However, too strong blue light and absence of cyan light results in incongruous emission strength and low color rendering index (CRI), which cause serious damage to retina of eye. To overcome these shortcomings, cyan light emitting phosphor is highly desirable for the full-visible-spectrum LED with high CRI, but bright cyan phosphor remains rare. Herein, a new 0D hybrid copper(I) halide of [TMPDA]CuI (TMPDA = ,2,2-tetramethyl-1,3-propylenediamine) single crystal is reported as a cyan light emitter with mominant emission wavelength at 489 nm, photoluminescence quantum yield of 26.66 % and large Stokes shift of 198 nm exceeding most of organic-inorganic metal halides. Remarkably, the single crystals display stable emission in various polar organic solvents and high temperature with sufficient emitting stability. More significantly, this 0D cuprous halide act as down-conversion cyan phosphor to fabricate WLED with a high CRI of 95 by reducing the cyan gap. In this study, we demonstrate an optical engineering strategy to prepare efficient cyan light emitting 0D cuprous halide and assembly high-performance WLED.
{"title":"Zero-dimensional hybrid Cu(I) halide with cyan light emission for use in white light emitting diode","authors":"Qi Wang, Tian-Ci Liu, Wei Jiang, Peng-Yao Xuan, Xin-Yuan Li, Fei Guan, Xiao-Wu Lei, Zhi-Hong Jing, Xiang-Wen Kong","doi":"10.1016/j.mtchem.2024.102263","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102263","url":null,"abstract":"Traditional white light-emitting diode (WLED) is mainly depending on coating broadband yellow phosphors (520–700 nm) on blue emitting LED chip (440–460). However, too strong blue light and absence of cyan light results in incongruous emission strength and low color rendering index (CRI), which cause serious damage to retina of eye. To overcome these shortcomings, cyan light emitting phosphor is highly desirable for the full-visible-spectrum LED with high CRI, but bright cyan phosphor remains rare. Herein, a new 0D hybrid copper(I) halide of [TMPDA]CuI (TMPDA = ,2,2-tetramethyl-1,3-propylenediamine) single crystal is reported as a cyan light emitter with mominant emission wavelength at 489 nm, photoluminescence quantum yield of 26.66 % and large Stokes shift of 198 nm exceeding most of organic-inorganic metal halides. Remarkably, the single crystals display stable emission in various polar organic solvents and high temperature with sufficient emitting stability. More significantly, this 0D cuprous halide act as down-conversion cyan phosphor to fabricate WLED with a high CRI of 95 by reducing the cyan gap. In this study, we demonstrate an optical engineering strategy to prepare efficient cyan light emitting 0D cuprous halide and assembly high-performance WLED.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"12 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204504","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 : 2024-08-21DOI: 10.1016/j.mtchem.2024.102262
Azad H. Alshatteri, Sameera Sh Mohammed Ameen, Dnya Latif, Yousif O. Mohammad, Khalid M. Omer
Nanozymes, synthetic nano-scale materials with enzyme-like behavior, have shown remarkable advancements and widespread utilization across various applications. However, the majority of nanozymes require precursor of synthetic-chemicals, which are sometimes expensive and undergo complicated preparations and tedious purification procedures. Therefore, it is of utmost significance to find an enzyme mimic that is affordable, abundant, highly efficient, and sustainable for various applications in biomedicine, environmental sciences, and the food industry. We prove the efficient peroxidase-like activities of the earthly available mineral, barunite-II. The braunite-II mineral micro-nanoparticles (NB) were prepared via physical milling. The enzyme mimetic activity of mineral nanoparticles, referred to as “mineralzyme,” could oxidize the chromogenic blue color of TMB (3,3′,5,5′-tetramethylbenzidine) to oxTMB (3,3′,5,5′-tetramethylbenzidine oxide). Michaelis-Menten constant (K) and maximum velocity (V) were 135 mM and 62.73 mM min for TMB as a substrate, 139.2 mM, and 2.69 mM min for HO as a substrate. The K values are much lower than those for HRP. We accurately quantified the total antioxidant capacity in seminal fluid samples from infertile patients using the peroxidase activity of the mineral nanoparticles. This investigation will open new avenues to explore the realm of mineralzyme, revealing its significant potential for a wide range of applications involving diverse enzymatic behaviors.
纳米酶是一种具有类似酶行为的合成纳米级材料，在各种应用领域都取得了显著的进步和广泛的应用。然而，大多数纳米酶需要前体合成化学品，有时价格昂贵，而且需要经过复杂的制备和繁琐的纯化程序。因此，为生物医学、环境科学和食品工业的各种应用找到一种价格低廉、资源丰富、高效且可持续的酶模拟物至关重要。我们证明了地球上可获得的矿物--巴鲁尼特-II 的高效过氧化物酶样活性。我们通过物理研磨法制备了巴鲁尼特-II 矿物微纳米颗粒（NB）。矿物质纳米颗粒的酶模拟活性被称为 "矿物质酶"，它能将发蓝的 TMB（3,3′,5,5′-四甲基联苯胺）氧化成 oxTMB（3,3′,5,5′-四甲基联苯胺氧化物）。以 TMB 为底物的迈克尔斯-门顿常数（K）和最大速度（V）分别为 135 mM 和 62.73 mM min，以 HO 为底物的迈克尔斯-门顿常数（K）和最大速度（V）分别为 139.2 mM 和 2.69 mM min。K 值远远低于 HRP 的 K 值。我们利用矿物纳米粒子的过氧化物酶活性准确地量化了不育患者精液样本中的总抗氧化能力。这项研究将为探索矿物酶领域开辟新的途径，揭示其在涉及各种酶行为的广泛应用中的巨大潜力。
{"title":"Nanoscale mineral as a novel class enzyme mimic (mineralzyme) with total antioxidant capacity detection: Colorimetric and smartphone-based approaches","authors":"Azad H. Alshatteri, Sameera Sh Mohammed Ameen, Dnya Latif, Yousif O. Mohammad, Khalid M. Omer","doi":"10.1016/j.mtchem.2024.102262","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102262","url":null,"abstract":"Nanozymes, synthetic nano-scale materials with enzyme-like behavior, have shown remarkable advancements and widespread utilization across various applications. However, the majority of nanozymes require precursor of synthetic-chemicals, which are sometimes expensive and undergo complicated preparations and tedious purification procedures. Therefore, it is of utmost significance to find an enzyme mimic that is affordable, abundant, highly efficient, and sustainable for various applications in biomedicine, environmental sciences, and the food industry. We prove the efficient peroxidase-like activities of the earthly available mineral, barunite-II. The braunite-II mineral micro-nanoparticles (NB) were prepared via physical milling. The enzyme mimetic activity of mineral nanoparticles, referred to as “mineralzyme,” could oxidize the chromogenic blue color of TMB (3,3′,5,5′-tetramethylbenzidine) to oxTMB (3,3′,5,5′-tetramethylbenzidine oxide). Michaelis-Menten constant (K) and maximum velocity (V) were 135 mM and 62.73 mM min for TMB as a substrate, 139.2 mM, and 2.69 mM min for HO as a substrate. The K values are much lower than those for HRP. We accurately quantified the total antioxidant capacity in seminal fluid samples from infertile patients using the peroxidase activity of the mineral nanoparticles. This investigation will open new avenues to explore the realm of mineralzyme, revealing its significant potential for a wide range of applications involving diverse enzymatic behaviors.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"29 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204505","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 : 2024-08-21DOI: 10.1016/j.mtchem.2024.102250
Deimer R. Gómez-Mejía, Juan C. Expósito-Gálvez, Gerko Oskam, Daniel Olguín-Melo, Omar Jiménez-Sandoval
Mullite-type BiFeO has been little explored in thin film form as a photoanode for photoelectrochemical water splitting. In this study, BiFeO thin films have been prepared using the sol-gel technique from a simple precursor solution based on the corresponding metal salts, acetic acid, and polyvinyl alcohol. The films were deposited by dip-coating onto fluorine-doped tin oxide substrates and dried at 350 °C, repeating the dipping-drying cycle six times, and finally sintered at 600 °C. The films were characterized by GIXRD, revealing the formation of the material in its orthorhombic phase. Raman spectroscopy showed the A and B vibrational modes, validating the formation of the bismuth iron oxide. UV–Vis transmittance measurements revealed that the material exhibits two optical transitions: a direct band gap of 2.86 eV and an indirect band gap of 1.98 eV. FESEM micrographs and AFM images showed a uniform nanostructured surface morphology. The photoelectrochemical properties of the BiFeO films were studied using cyclic voltammetry and chronoamperometry with front side illumination, demonstrating the stability of the material in aqueous media and the generation of photocurrent in the presence of HO. Furthermore, results from intensity-modulated photocurrent spectroscopy (IMPS) revealed that the photocurrent is limited by both bulk and surface recombination and a short hole diffusion length.
以薄膜形式将莫来石型 BiFeO 用作光电化学分水的光阳极的研究还很少。本研究采用溶胶-凝胶技术，从基于相应金属盐、醋酸和聚乙烯醇的简单前驱体溶液中制备了 BiFeO 薄膜。薄膜通过浸涂沉积在掺氟氧化锡基底上，然后在 350 ℃ 下干燥，重复浸涂-干燥循环六次，最后在 600 ℃ 下烧结。利用 GIXRD 对薄膜进行了表征，结果表明材料是以正交相形成的。拉曼光谱显示了 A 和 B 振荡模式，验证了氧化铁铋的形成。紫外-可见透射测量显示，该材料有两个光学转变：2.86 eV 的直接带隙和 1.98 eV 的间接带隙。FESEM 显微照片和 AFM 图像显示了均匀的纳米结构表面形态。研究人员使用循环伏安法和计时电流法研究了 BiFeO 薄膜的光电化学特性，结果表明该材料在水介质中具有稳定性，并能在 HO 存在的情况下产生光电流。此外，强度调制光电流光谱法（IMPS）的研究结果表明，光电流受到体重组和表面重组以及短空穴扩散长度的限制。
{"title":"Synthesis, characterization and photoelectrochemical performance of Bi2Fe4O9 thin films","authors":"Deimer R. Gómez-Mejía, Juan C. Expósito-Gálvez, Gerko Oskam, Daniel Olguín-Melo, Omar Jiménez-Sandoval","doi":"10.1016/j.mtchem.2024.102250","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102250","url":null,"abstract":"Mullite-type BiFeO has been little explored in thin film form as a photoanode for photoelectrochemical water splitting. In this study, BiFeO thin films have been prepared using the sol-gel technique from a simple precursor solution based on the corresponding metal salts, acetic acid, and polyvinyl alcohol. The films were deposited by dip-coating onto fluorine-doped tin oxide substrates and dried at 350 °C, repeating the dipping-drying cycle six times, and finally sintered at 600 °C. The films were characterized by GIXRD, revealing the formation of the material in its orthorhombic phase. Raman spectroscopy showed the A and B vibrational modes, validating the formation of the bismuth iron oxide. UV–Vis transmittance measurements revealed that the material exhibits two optical transitions: a direct band gap of 2.86 eV and an indirect band gap of 1.98 eV. FESEM micrographs and AFM images showed a uniform nanostructured surface morphology. The photoelectrochemical properties of the BiFeO films were studied using cyclic voltammetry and chronoamperometry with front side illumination, demonstrating the stability of the material in aqueous media and the generation of photocurrent in the presence of HO. Furthermore, results from intensity-modulated photocurrent spectroscopy (IMPS) revealed that the photocurrent is limited by both bulk and surface recombination and a short hole diffusion length.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"19 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204518","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 : 2024-08-21DOI: 10.1016/j.mtchem.2024.102258
Maitri Chakraborty, Arikketh Devi
Tissue damage or the loss of tissue in certain traumatic situations or unexpected events can severely impact the body's overall health and well-being. Synthetic and natural materials have a wide range of applications in the biomedical field, including bioactuators, biosensors, neural implants, drug delivery systems, and tissue engineering scaffolds. This review focuses specifically on these materials for tissue engineering applications. Tissue engineering scaffolds act as an extracellular matrix that interacts with cells before forming new tissue. The chemical and structural characteristics of scaffolds are crucial in creating an ideal three-dimensional structure for tissue engineering applications. Scaffolds used for tissue engineering should possess proper architecture and mechanical properties, as well as support cell adhesion, proliferation, and differentiation. A significant amount of research has been conducted on the topic of various scaffold properties, such as surface topographic features (roughness and hydrophilicity) and scaffold microstructures (pore size, porosity, pore interconnectivity, and pore and fiber architectures) that influence cell-scaffold interactions. This review also highlights on the techniques used to create scaffolds with the required property of biocompatibility with tissues, as well as its desired properties and applications where scaffolds are currently being used in modern times.
{"title":"Landscape of scaffolds from advanced synthesis to tissue engineering","authors":"Maitri Chakraborty, Arikketh Devi","doi":"10.1016/j.mtchem.2024.102258","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102258","url":null,"abstract":"Tissue damage or the loss of tissue in certain traumatic situations or unexpected events can severely impact the body's overall health and well-being. Synthetic and natural materials have a wide range of applications in the biomedical field, including bioactuators, biosensors, neural implants, drug delivery systems, and tissue engineering scaffolds. This review focuses specifically on these materials for tissue engineering applications. Tissue engineering scaffolds act as an extracellular matrix that interacts with cells before forming new tissue. The chemical and structural characteristics of scaffolds are crucial in creating an ideal three-dimensional structure for tissue engineering applications. Scaffolds used for tissue engineering should possess proper architecture and mechanical properties, as well as support cell adhesion, proliferation, and differentiation. A significant amount of research has been conducted on the topic of various scaffold properties, such as surface topographic features (roughness and hydrophilicity) and scaffold microstructures (pore size, porosity, pore interconnectivity, and pore and fiber architectures) that influence cell-scaffold interactions. This review also highlights on the techniques used to create scaffolds with the required property of biocompatibility with tissues, as well as its desired properties and applications where scaffolds are currently being used in modern times.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"3 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204515","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 : 2024-08-20DOI: 10.1016/j.mtchem.2024.102246
Shubham Pant, Renuka Vijayaraghavan, Sravanthi Loganathan, Ravi Babu Valapa
The current work aims to formulate novel bioactive and biocompatible 3D printed poly (-lactic acid)/Beta tri calcium phosphate composite scaffolds reinforced with different types of mesoporous silica materials [PLA/-TCP/MSMs] for bone regeneration application, which is not envisaged earlier. The bioink encompassing 30 % organic content (PLA) and 70 % inorganic content (-TCP and MSMs) is formulated and their rheological characteristics are evaluated. Optimization of process conditions for 3D printed PLA composite scaffolds was done and pneumatic extrusion is performed. The physico-chemical properties as well as biological characteristics were assessed for 3D printed PLA/-TCP/MSMs based composite scaffolds. The existence of -TCP and MSMs incorporated into PLA matrix was observed to fasten the formation of hydroxyapatite, as evidenced by bioactivity assessment. The cytocompatibility analysis revealed that the 3D printed PLA/-TCP/MSMs composite scaffolds exhibit suitable biocompatible behaviour and osteogenic potential. The calcium mineralization and ALP expression were also noticed in higher levels for 3D printed PLA/-TCP/MSMs composite scaffolds. Gene expression analysis confirmed the expression of COL1, OCN, BMP-2 and RUNX2 on 3D printed PLA/-TCP/MSMs composite scaffolds. The results speculate that this novel formulation closely resembling the composition of natural bone might have promising applications in terms of bone tissue engineering.
{"title":"3D-bioprinted poly(lactic acid)/β-TCP/mesoporous silica scaffolds: An investigation on in-vitro bioactivity and osteogenesis characteristics","authors":"Shubham Pant, Renuka Vijayaraghavan, Sravanthi Loganathan, Ravi Babu Valapa","doi":"10.1016/j.mtchem.2024.102246","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102246","url":null,"abstract":"The current work aims to formulate novel bioactive and biocompatible 3D printed poly (-lactic acid)/Beta tri calcium phosphate composite scaffolds reinforced with different types of mesoporous silica materials [PLA/-TCP/MSMs] for bone regeneration application, which is not envisaged earlier. The bioink encompassing 30 % organic content (PLA) and 70 % inorganic content (-TCP and MSMs) is formulated and their rheological characteristics are evaluated. Optimization of process conditions for 3D printed PLA composite scaffolds was done and pneumatic extrusion is performed. The physico-chemical properties as well as biological characteristics were assessed for 3D printed PLA/-TCP/MSMs based composite scaffolds. The existence of -TCP and MSMs incorporated into PLA matrix was observed to fasten the formation of hydroxyapatite, as evidenced by bioactivity assessment. The cytocompatibility analysis revealed that the 3D printed PLA/-TCP/MSMs composite scaffolds exhibit suitable biocompatible behaviour and osteogenic potential. The calcium mineralization and ALP expression were also noticed in higher levels for 3D printed PLA/-TCP/MSMs composite scaffolds. Gene expression analysis confirmed the expression of COL1, OCN, BMP-2 and RUNX2 on 3D printed PLA/-TCP/MSMs composite scaffolds. The results speculate that this novel formulation closely resembling the composition of natural bone might have promising applications in terms of bone tissue engineering.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"18 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204520","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 : 2024-08-20DOI: 10.1016/j.mtchem.2024.102235
Qianying Huang, Ying Chen, Min Ye, Shuze Zhuang, Aiguo Zhong, Jianqiang Liu, Govindhan Maduraiveeran, Yanqiong Peng, Yong Huang
The process of healing a wound is multifaceted and organized that needs the organization and support of countless biological activities to achieve effective repair of damage. Coagulation, inflammation, proliferation, and remodeling represent its four stages. However, in the method of healing behavior disorders often occur, leading to tissue damage or healing disorders. Because of the associated morbidity and socioeconomic cost, managing wound healing requires innovative methods that are both clinically and financially demanding. Therefore, it is required to discover and research new drugs or treatments for quicker wound healing. Metal-organic frameworks (MOFs) are porous combined materials comprised of ions of metal connected with organic moieties. MOFs are not only extensively employed in various fields but also have prodigious potential for encouraging healing of wound. The present review encapsulates the advancements of MOF-derived materials in upholding wound healing processes. In particular, the physiopathological mechanism of wound healing improves the comprehension of biological and clinical mechanisms to repair a wound. The present review highlights the utilization of MOFs through surface engineering for effective wound healing, and surface-functional characteristics. Application materials include hydrogels, nanofibers, and microneedles that classify MOFs. The possible biomedical applications of MOFs are highlighted, including metal delivery systems, catalytic enzymes, and drug delivery. Finally, the challenges and possible outlook strategies for the progress of MOFs in wound healing through the integration of materials and biological interfaces are described.
{"title":"Metal-organic framework-based dressings: Application and opportunities in wound healing","authors":"Qianying Huang, Ying Chen, Min Ye, Shuze Zhuang, Aiguo Zhong, Jianqiang Liu, Govindhan Maduraiveeran, Yanqiong Peng, Yong Huang","doi":"10.1016/j.mtchem.2024.102235","DOIUrl":"https://doi.org/10.1016/j.mtchem.2024.102235","url":null,"abstract":"The process of healing a wound is multifaceted and organized that needs the organization and support of countless biological activities to achieve effective repair of damage. Coagulation, inflammation, proliferation, and remodeling represent its four stages. However, in the method of healing behavior disorders often occur, leading to tissue damage or healing disorders. Because of the associated morbidity and socioeconomic cost, managing wound healing requires innovative methods that are both clinically and financially demanding. Therefore, it is required to discover and research new drugs or treatments for quicker wound healing. Metal-organic frameworks (MOFs) are porous combined materials comprised of ions of metal connected with organic moieties. MOFs are not only extensively employed in various fields but also have prodigious potential for encouraging healing of wound. The present review encapsulates the advancements of MOF-derived materials in upholding wound healing processes. In particular, the physiopathological mechanism of wound healing improves the comprehension of biological and clinical mechanisms to repair a wound. The present review highlights the utilization of MOFs through surface engineering for effective wound healing, and surface-functional characteristics. Application materials include hydrogels, nanofibers, and microneedles that classify MOFs. The possible biomedical applications of MOFs are highlighted, including metal delivery systems, catalytic enzymes, and drug delivery. Finally, the challenges and possible outlook strategies for the progress of MOFs in wound healing through the integration of materials and biological interfaces are described.","PeriodicalId":18353,"journal":{"name":"Materials Today Chemistry","volume":"10 1","pages":""},"PeriodicalIF":7.3,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142204522","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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