The increasing photocatalytic activity of Ni:ZnO/Fe3O4 nanocomposite in the diazinon degradation under solar light compared to bare ZnO and Ni:ZnO nanoparticles was examined.
Methods
The synthesized nanoparticles and nanocomposite were characterized by SEM, MAP-EDX, XRD, FTIR, DLS, Zeta Potential and UV–Vis Spectrophotometer methods. The photocatalytic degradation of diazinon was investigated under sunlight illumination while continuously mixing on a stirrer for 180 min.
Significant findings
The highest degradation efficiency was achieved for 1.5 wt% Ni:ZnO nanoparticles and 1.0 wt% Ni:ZnO/Fe3O4 nanocomposite at a diazinon concentration of 10 mg/L for the nanoparticle dose equal to 2 g/L was 95 % and 93 %, respectively. The recycling photocatalysts were investigated. Application of H2O2, potassium peroxymonosulfate (PMS) and S2O82− as chemical oxidants increased the photocatalytic activity of the nanocomposite. The use of 1.0 wt% Ni:ZnO/Fe3O4 nanocomposite along with 0.01 M H2O2 displayed the increasing photocatalytic performance. The simultaneous photocatalytic degradation efficiency of combined H2O2 and 1.0 wt% NZF nanocomposite for 100 mg/l of diazinon increased from 44 to 82 %. The photocatalytic mechanism of diazinon was proposed in three pathways.
{"title":"Enhanced photocatalytic degradation of diazinon using Ni:ZnO/Fe3O4 nanocomposite under solar light","authors":"Hamzeh Salehzadeh , Kitirote Wantala , Behzad Shahmoradi , Afshin Maleki , Totsaporn Suwannaruang , Harikaranahalli Puttaiah Shivaraju , Ebrahim Mohammadi , Guogang Ren , David F. Jenkins , Hee-Jeong Choi , Mahdi Safari","doi":"10.1016/j.jtice.2024.105528","DOIUrl":"https://doi.org/10.1016/j.jtice.2024.105528","url":null,"abstract":"<div><h3>Background</h3><p>The increasing photocatalytic activity of Ni:ZnO/Fe<sub>3</sub>O<sub>4</sub> nanocomposite in the diazinon degradation under solar light compared to bare ZnO and Ni:ZnO nanoparticles was examined.</p></div><div><h3>Methods</h3><p>The synthesized nanoparticles and nanocomposite were characterized by SEM, MAP-EDX, XRD, FTIR, DLS, Zeta Potential and UV–Vis Spectrophotometer methods. The photocatalytic degradation of diazinon was investigated under sunlight illumination while continuously mixing on a stirrer for 180 min.</p></div><div><h3>Significant findings</h3><p>The highest degradation efficiency was achieved for 1.5 wt% Ni:ZnO nanoparticles and 1.0 wt% Ni:ZnO/Fe<sub>3</sub>O<sub>4</sub> nanocomposite at a diazinon concentration of 10 mg/L for the nanoparticle dose equal to 2 g/L was 95 % and 93 %, respectively. The recycling photocatalysts were investigated. Application of H<sub>2</sub>O<sub>2</sub>, potassium peroxymonosulfate (PMS) and S<sub>2</sub>O<sub>8</sub><sup>2−</sup> as chemical oxidants increased the photocatalytic activity of the nanocomposite. The use of 1.0 wt% Ni:ZnO/Fe<sub>3</sub>O<sub>4</sub> nanocomposite along with 0.01 M H<sub>2</sub>O<sub>2</sub> displayed the increasing photocatalytic performance. The simultaneous photocatalytic degradation efficiency of combined H<sub>2</sub>O<sub>2</sub> and 1.0 wt% NZF nanocomposite for 100 mg/l of diazinon increased from 44 to 82 %. The photocatalytic mechanism of diazinon was proposed in three pathways.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140946977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Recycling of remnant materials such as solvents, various ions, stabilizing and reducing agents after solution phase synthesis and purification of the nanomaterials transmits favorable impact on industrial production.
Methods
In this research paper, we fabricated silver nanowire (AgNW)-based flexible transparent electrodes (FTEs), wherein synthesis of AgNWs was performed using remnant materials residual solvents, dissolved unreacted reagents left after standard polyol synthesis protocol.
Significant Findings
It has been found that the residue remains after standard polyol synthesis of AgNWs can be utilized multiple times for the synthesis of fresh nanowires so called recycled-AgNWs by optimizing input reactants and reaction conditions such as concentration of AgNO3, FeCl3, PVP etc. The structural and morphological studies of the recycled-AgNWs have been carried out using XRD, SEM, TEM, XPS. The FTE fabricated using such recycled-AgNWs delivered sheet resistance of 12.2 ± 1.1 Ω/sq with transmittance of 86 ± 4 % at 550 nm and sustained its conductivity after repeated bending cycles. The comparison between our FTE prepared using recycled-AgNWs and recently reported FTE using standard AgNWs have revealed the similar properties. Furthermore, we have demonstrated fabricated FTE as flexible transparent heater, which generated 80 °C of temperature by applying 7 V supply for 30 s. The quick temperature increase make the recycled-AgNWs-based transparent heater as an excellent antifogging or self-cleaning device, which can be further applied for various other applications.
{"title":"Multiple times synthesis of silver nanowires by recycling the waste left after standard polyol synthesis for flexible transparent heater","authors":"Esther Dimngaihvungi , Manish Kumar , Atul Kumar Singh , Balaram Pani , Ashish Kumar Singh , Manjeet Singh","doi":"10.1016/j.jtice.2024.105529","DOIUrl":"https://doi.org/10.1016/j.jtice.2024.105529","url":null,"abstract":"<div><h3>Background</h3><p>Recycling of remnant materials such as solvents, various ions, stabilizing and reducing agents after solution phase synthesis and purification of the nanomaterials transmits favorable impact on industrial production.</p></div><div><h3>Methods</h3><p>In this research paper, we fabricated silver nanowire (AgNW)-based flexible transparent electrodes (FTEs), wherein synthesis of AgNWs was performed using remnant materials residual solvents, dissolved unreacted reagents left after standard polyol synthesis protocol.</p></div><div><h3>Significant Findings</h3><p>It has been found that the residue remains after standard polyol synthesis of AgNWs can be utilized multiple times for the synthesis of fresh nanowires so called recycled-AgNWs by optimizing input reactants and reaction conditions such as concentration of AgNO<sub>3</sub>, FeCl<sub>3</sub>, PVP etc. The structural and morphological studies of the recycled-AgNWs have been carried out using XRD, SEM, TEM, XPS. The FTE fabricated using such recycled-AgNWs delivered sheet resistance of 12.2 ± 1.1 Ω/sq with transmittance of 86 ± 4 % at 550 nm and sustained its conductivity after repeated bending cycles. The comparison between our FTE prepared using recycled-AgNWs and recently reported FTE using standard AgNWs have revealed the similar properties. Furthermore, we have demonstrated fabricated FTE as flexible transparent heater, which generated 80 °C of temperature by applying 7 V supply for 30 s. The quick temperature increase make the recycled-AgNWs-based transparent heater as an excellent antifogging or self-cleaning device, which can be further applied for various other applications.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140946978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-13DOI: 10.1016/j.jtice.2024.105531
Jia–Ruei Chang , Sinn-wen Chen , He-Cheng Yang , Cheng-Hsi Ho
Background
Bi2Te3 is the most frequently used thermoelectric compound, while Co exhibits promise as a barrier layer candidate. To provide fundamental information, the Bi-Co-Te phase equilibria isothermal sections at 500 and 400 ℃, as well as the Co/Bi2Te3 interfacial reactions at 500, 400, and 300 ℃, were determined.
Methods
The Bi-Co-Te alloys and Bi2Te3 substrates were synthesized using high-purity constituent elements. To form the Co/Bi2Te3 couples, Co was electroplated onto the Bi2Te3 substrates, after which they were subjected to reactions at specific temperatures.
Significant findings
In the Bi-Co-Te ternary system, no ternary compounds were found, and all the binary compounds have limited solubility for ternary elements. In the Co/Bi2Te3 couples, significant interfacial reactions were observed. The results suggest that Co alone is not a suitable barrier layer. The reaction paths are Co/CoTe/(Bi2)m(Bi2Te3)n/Bi2Te3 when reacted at 400 and 300 ℃. Although 500 ℃ is below the melting points of both Co and Bi2Te3, surprising liquation occurred, and the reaction path is Co/CoTe/Co+ (Bi2)m(Bi2Te3)n +liquid (I)/Bi2Te3 at 500 ℃. Based on the morphologies and results of the reaction path, it is concluded the dominating diffusion species is Te.
{"title":"Co/Bi2Te3 interfacial reactions and Bi-Co-Te phase equilibria","authors":"Jia–Ruei Chang , Sinn-wen Chen , He-Cheng Yang , Cheng-Hsi Ho","doi":"10.1016/j.jtice.2024.105531","DOIUrl":"https://doi.org/10.1016/j.jtice.2024.105531","url":null,"abstract":"<div><h3>Background</h3><p>Bi<sub>2</sub>Te<sub>3</sub> is the most frequently used thermoelectric compound, while Co exhibits promise as a barrier layer candidate. To provide fundamental information, the Bi-Co-Te phase equilibria isothermal sections at 500 and 400 ℃, as well as the Co/Bi<sub>2</sub>Te<sub>3</sub> interfacial reactions at 500, 400, and 300 ℃, were determined.</p></div><div><h3>Methods</h3><p>The Bi-Co-Te alloys and Bi<sub>2</sub>Te<sub>3</sub> substrates were synthesized using high-purity constituent elements. To form the Co/Bi<sub>2</sub>Te<sub>3</sub> couples, Co was electroplated onto the Bi<sub>2</sub>Te<sub>3</sub> substrates, after which they were subjected to reactions at specific temperatures.</p></div><div><h3>Significant findings</h3><p>In the Bi-Co-Te ternary system, no ternary compounds were found, and all the binary compounds have limited solubility for ternary elements. In the Co/Bi<sub>2</sub>Te<sub>3</sub> couples, significant interfacial reactions were observed. The results suggest that Co alone is not a suitable barrier layer. The reaction paths are Co/CoTe/(Bi<sub>2</sub>)<sub>m</sub>(Bi<sub>2</sub>Te<sub>3</sub>)<sub>n</sub>/Bi<sub>2</sub>Te<sub>3</sub> when reacted at 400 and 300 ℃. Although 500 ℃ is below the melting points of both Co and Bi<sub>2</sub>Te<sub>3</sub>, surprising liquation occurred, and the reaction path is Co/CoTe/Co+ (Bi<sub>2</sub>)<sub>m</sub>(Bi<sub>2</sub>Te<sub>3</sub>)<sub>n</sub> +liquid (I)/Bi<sub>2</sub>Te<sub>3</sub> at 500 ℃. Based on the morphologies and results of the reaction path, it is concluded the dominating diffusion species is Te.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140918265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-11DOI: 10.1016/j.jtice.2024.105536
Milad Ramezanpour , Majid Siavashi , Hamidreza Khoshtarash , Martin J. Blunt
Background
Nanoparticle deposition in a subsurface environment decreases the amount of material in the bulk fluid, increases surface roughness, and affects nanofluid flow. Nanoparticle transport in porous media is a complex, multiscale phenomenon. Its macroscopic behavior is determined by phenomena at the pore-scale. Hence, it is necessary and of interest to study the transport and deposition of nanoparticles in porous media using a pore-scale approach.
Methods
A computational solver is developed using an Eulerian-Lagrangian approach within the OpenFOAM library. A Berea sandstone and three open-cell metal foams with porosities of 0.8, 0.85, and 0.9, constructed by Laguerre-Voronoi tessellation, were analyzed to study nanoparticle behavior in water.
Significant findings
Nanoparticle deposition on solid surfaces is influenced by porosity, double layer thickness (NDL), surface potential magnitude (NE1), and nanoparticle diameter. Brownian motion that has a significant impact on nanoparticle transport and deposition is also examined. For nanoparticles with 20 nm diameter, the fraction of particles deposited in foam with 0.8 porosity is about 17 % more than the foam with 0.9 porosity. This difference decreases with nanoparticle diameter. For the particles with 100 nm diameter and more, the effects of Brownian motion on nanoparticle deposition becomes negligible.
{"title":"Transport and deposition of nanoparticles in porous media at the pore scale using an Eulerian-Lagrangian method","authors":"Milad Ramezanpour , Majid Siavashi , Hamidreza Khoshtarash , Martin J. Blunt","doi":"10.1016/j.jtice.2024.105536","DOIUrl":"https://doi.org/10.1016/j.jtice.2024.105536","url":null,"abstract":"<div><h3>Background</h3><p>Nanoparticle deposition in a subsurface environment decreases the amount of material in the bulk fluid, increases surface roughness, and affects nanofluid flow. Nanoparticle transport in porous media is a complex, multiscale phenomenon. Its macroscopic behavior is determined by phenomena at the pore-scale. Hence, it is necessary and of interest to study the transport and deposition of nanoparticles in porous media using a pore-scale approach.</p></div><div><h3>Methods</h3><p>A computational solver is developed using an Eulerian-Lagrangian approach within the OpenFOAM library. A Berea sandstone and three open-cell metal foams with porosities of 0.8, 0.85, and 0.9, constructed by Laguerre-Voronoi tessellation, were analyzed to study nanoparticle behavior in water.</p></div><div><h3>Significant findings</h3><p>Nanoparticle deposition on solid surfaces is influenced by porosity, double layer thickness (<em>N<sub>DL</sub></em>), surface potential magnitude (<em>N<sub>E1</sub></em>), and nanoparticle diameter. Brownian motion that has a significant impact on nanoparticle transport and deposition is also examined. For nanoparticles with 20 nm diameter, the fraction of particles deposited in foam with 0.8 porosity is about 17 % more than the foam with 0.9 porosity. This difference decreases with nanoparticle diameter. For the particles with 100 nm diameter and more, the effects of Brownian motion on nanoparticle deposition becomes negligible.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140906103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-11DOI: 10.1016/j.jtice.2024.105548
Mir Majid Hosseini , Mir Ghasem Hosseini , Iraj Ahadzadeh , Reza Najjar
Background
Higher purity of copper is produced by Electrowinning (EW) in the cathode. A major challenge in this technique is the anodic structure that causes in the energy consumption, corrosion resistance, and contamination of the copper produced in the cathode.
Methods
Ternary metallic oxide (IrO2-ZrO2-SiO2) composites with the different molar percentages of IrO2: SiO2 (10:60, 15:55, and 20:50%) were prepared on titanium substrate by the sol-gel technique, and then thermal decomposition to study the impact of IrO2 and SiO2 contents on the electrocatalyst performances of the dimensionally stable anodes (DSAs). The physicochemical properties of the DSAs were determined by X-ray diffraction (XRD), Field emission scanning electron microscope (FE-SEM), Atomic force microscopy (AFM), and electrochemical measurements.
Significant findings
FE-SEM and AFM images display the impact of SiO2 on the crystallization and crystal growth of IrO2, leading to the formation of finer oxide particles and the porous morphology of the ternary oxide coatings. The DSA composed of 50 % SiO2 and 20 % IrO2 (IZS (20–30–50)) with a more porous surface area represented high apparent electrocatalytic activity toward the oxygen evolution reaction with long-term stability as analyzed under cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and accelerated lifetime (ALT) plots.
{"title":"IrO2-ZrO2-SiO2 ternary oxide composites- based DSAs: Activity toward oxygen evolution reaction with long-term stability","authors":"Mir Majid Hosseini , Mir Ghasem Hosseini , Iraj Ahadzadeh , Reza Najjar","doi":"10.1016/j.jtice.2024.105548","DOIUrl":"https://doi.org/10.1016/j.jtice.2024.105548","url":null,"abstract":"<div><h3>Background</h3><p>Higher purity of copper is produced by Electrowinning (EW) in the cathode. A major challenge in this technique is the anodic structure that causes in the energy consumption, corrosion resistance, and contamination of the copper produced in the cathode.</p></div><div><h3>Methods</h3><p>Ternary metallic oxide (IrO<sub>2</sub>-ZrO<sub>2</sub>-SiO<sub>2</sub>) composites with the different molar percentages of IrO<sub>2</sub>: SiO<sub>2</sub> (10:60, 15:55, and 20:50%) were prepared on titanium substrate by the sol-gel technique, and then thermal decomposition to study the impact of IrO<sub>2</sub> and SiO<sub>2</sub> contents on the electrocatalyst performances of the dimensionally stable anodes (DSAs). The physicochemical properties of the DSAs were determined by X-ray diffraction (XRD), Field emission scanning electron microscope (FE-SEM), Atomic force microscopy (AFM), and electrochemical measurements.</p></div><div><h3>Significant findings</h3><p>FE-SEM and AFM images display the impact of SiO<sub>2</sub> on the crystallization and crystal growth of IrO<sub>2</sub>, leading to the formation of finer oxide particles and the porous morphology of the ternary oxide coatings. The DSA composed of 50 % SiO<sub>2</sub> and 20 % IrO<sub>2</sub> (IZS (20–30–50)) with a more porous surface area represented high apparent electrocatalytic activity toward the oxygen evolution reaction with long-term stability as analyzed under cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and accelerated lifetime (ALT) plots.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140905409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-10DOI: 10.1016/j.jtice.2024.105541
Xiaoyi Xu , Yuchan Weng , Jinlong Zhuang , Haifang Pei , Bingdang Wu , Wei Wu , Jingjing Yang , Bin Wang , Tianyin Huang
Background
Adsorption is one of the effective methods to remove antibiotics from water. Plant-based biochar can be effectively modified to enhance the adsorption capabilities of antibiotics.
Methods
Calamus biochar (PBC) was modified by phosphoric acid to study its adsorption efficacy on erythromycin (ERY) and sulfamethoxazole (SMX).
Significant Findings
PBC had a pore density of 0.771 m3·g−1, an average pore size of 5.14 nm, and an enormous surface area of 797 m2·g−1. PBC had been shown to incorporate a substantial quantity of functional groups containing oxygen by FTIR and XPS investigations. With these surface chemical and physical characteristics, PBC adsorbed 325 mg·g−1 of ERY and 216 mg·g−1 of SMX, which was tenfold higher compared to that of unmodified biochar and industrial-activated carbons. Quantitative analysis of adsorption mechanisms showed that the adsorption of ERY by PBC mainly included oxygen-containing functional group complexation and pore filling, whereas, the π-π interaction and pore filling were the leading mechanisms in the adsorption process of SMX. This research offers insights into the preparation of plant biochar with excellent antibiotic adsorption performance.
{"title":"Enhanced adsorption capacity of antibiotics by calamus-biochar with phosphoric acid modification: Performance assessment and mechanism analysis","authors":"Xiaoyi Xu , Yuchan Weng , Jinlong Zhuang , Haifang Pei , Bingdang Wu , Wei Wu , Jingjing Yang , Bin Wang , Tianyin Huang","doi":"10.1016/j.jtice.2024.105541","DOIUrl":"https://doi.org/10.1016/j.jtice.2024.105541","url":null,"abstract":"<div><h3>Background</h3><p>Adsorption is one of the effective methods to remove antibiotics from water. Plant-based biochar can be effectively modified to enhance the adsorption capabilities of antibiotics.</p></div><div><h3>Methods</h3><p>Calamus biochar (PBC) was modified by phosphoric acid to study its adsorption efficacy on erythromycin (ERY) and sulfamethoxazole (SMX).</p></div><div><h3>Significant Findings</h3><p>PBC had a pore density of 0.771 m<sup>3</sup>·g<sup>−1</sup>, an average pore size of 5.14 nm, and an enormous surface area of 797 m<sup>2</sup>·g<sup>−1</sup>. PBC had been shown to incorporate a substantial quantity of functional groups containing oxygen by FTIR and XPS investigations. With these surface chemical and physical characteristics, PBC adsorbed 325 mg·g<sup>−1</sup> of ERY and 216 mg·g<sup>−1</sup> of SMX, which was tenfold higher compared to that of unmodified biochar and industrial-activated carbons. Quantitative analysis of adsorption mechanisms showed that the adsorption of ERY by PBC mainly included oxygen-containing functional group complexation and pore filling, whereas, the π-π interaction and pore filling were the leading mechanisms in the adsorption process of SMX. This research offers insights into the preparation of plant biochar with excellent antibiotic adsorption performance.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140905410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-09DOI: 10.1016/j.jtice.2024.105537
Zhanping Cao , Qingyu Li , Peiwen Yan , Xuekuan Jing , Jingli Zhang
Background
In order to overcome the drawbacks of the pH value adjustment and Fe2+addition of traditional electro-Fenton in refractory organic wastewater treatment, we set up an electro-Fence system (FCC-EF) with multiple functions of adsorption, catalysis, and green regeneration for efficient and green degradation of ofloxacin (OFLO) wastewater under neutral condition.
Methods
The Fe3O4/clinoptilolite catalyst with adsorption function was prepared by hydrothermal synthesis method, and then characterized by energy dispersive spectrometer (EDS), transmission electron microscopy (TEM) and X-ray Diffractometer (XRD). The Fe3O4/clinoptilolite's chemical composition and oxidation state was investigated by X-ray photoelectron spectros (XPS). The degradation of OFLO and the total organic carbon (TOC) were determined through HPLC and a TOC analyzer, respectively.
Findings
The results indicate that in multi-cycle operation under current density of 6 mA·cm−2 and pH = 7, FCC-EF has a 100 % removal rate for OFLO and 80.4 ± 0.2 % removal rate for TOC at 165 min, while no iron ions are detected. The internal cycling of Fe3+/Fe2+ within Fe3O4 crystals is performed in FCC-EF. The green regeneration of Fe3O4/clinoptilolite and the efficient degradation of OFLO in multi-cycle operation could be simultaneously achieved under neutral condition.
{"title":"Green and sustainable degradation of ofloxacin in Fe3O4/clinoptilolite electro-Fenton system under neutral condition","authors":"Zhanping Cao , Qingyu Li , Peiwen Yan , Xuekuan Jing , Jingli Zhang","doi":"10.1016/j.jtice.2024.105537","DOIUrl":"https://doi.org/10.1016/j.jtice.2024.105537","url":null,"abstract":"<div><h3>Background</h3><p>In order to overcome the drawbacks of the pH value adjustment and Fe<sup>2+</sup>addition of traditional electro-Fenton in refractory organic wastewater treatment, we set up an electro-Fence system (FCC-EF) with multiple functions of adsorption, catalysis, and green regeneration for efficient and green degradation of ofloxacin (OFLO) wastewater under neutral condition.</p></div><div><h3>Methods</h3><p>The Fe<sub>3</sub>O<sub>4</sub>/clinoptilolite catalyst with adsorption function was prepared by hydrothermal synthesis method, and then characterized by energy dispersive spectrometer (EDS), transmission electron microscopy (TEM) and X-ray Diffractometer (XRD). The Fe<sub>3</sub>O<sub>4</sub>/clinoptilolite's chemical composition and oxidation state was investigated by X-ray photoelectron spectros (XPS). The degradation of OFLO and the total organic carbon (TOC) were determined through HPLC and a TOC analyzer, respectively.</p></div><div><h3>Findings</h3><p>The results indicate that in multi-cycle operation under current density of 6 mA·cm<sup>−2</sup> and pH = 7, FCC-EF has a 100 % removal rate for OFLO and 80.4 ± 0.2 % removal rate for TOC at 165 min, while no iron ions are detected. The internal cycling of Fe<sup>3+</sup>/Fe<sup>2+</sup> within Fe<sub>3</sub>O<sub>4</sub> crystals is performed in FCC-EF. The green regeneration of Fe<sub>3</sub>O<sub>4</sub>/clinoptilolite and the efficient degradation of OFLO in multi-cycle operation could be simultaneously achieved under neutral condition.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140893813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The atmospheric CO2 concentration is significantly increasing due to the utilization of fossil fuel in various activities. Implementation of steel slag is considered as a promising strategy for carbon capture
Methods
In this study, the slags from desulfurization (De-S) and ground granulated blast furnace (GGBS) processes in the steel company waste were applied as the sorbent in CO2 removal using a fluidized bed system. Various operating conditions were applied to determine the influence of operating parameters on sorbent performance. Moreover, examination on sorbent characteristic change and kinetics calculation were also carried out in this study.
Significant finding
Optimum operating temperature was reached by the application of 600 and 500 °C for De-S and GGBS slag, respectively. The higher CO2 concentration and 5 % water vapor improved the sorbent utilization. However, excessive water vapor and low fluidized velocity decreased the performance of sorbent. De-S slag performed better on overall CO2 capture process compared to GGBS slag. Therefore, upscaled study with 10 times greater size was further conducted with the 150–300 µm De-S slag for the CO2 capture from oxy-fuel and air combustion. The higher CO2 partial pressure in the flue gas of oxy-fuel combustion increased the capture process efficiency.
{"title":"Investigation on desulfurization and ground granulated blast furnace slags reutilization for carbon dioxide sorption in a fluidized bed reactor","authors":"Birgitta Narindri Rara Winayu, Kai-Chiun Liang, Hsin Chu","doi":"10.1016/j.jtice.2024.105527","DOIUrl":"https://doi.org/10.1016/j.jtice.2024.105527","url":null,"abstract":"<div><h3>Background</h3><p>The atmospheric CO<sub>2</sub> concentration is significantly increasing due to the utilization of fossil fuel in various activities. Implementation of steel slag is considered as a promising strategy for carbon capture</p></div><div><h3>Methods</h3><p>In this study, the slags from desulfurization (De-S) and ground granulated blast furnace (GGBS) processes in the steel company waste were applied as the sorbent in CO<sub>2</sub> removal using a fluidized bed system. Various operating conditions were applied to determine the influence of operating parameters on sorbent performance. Moreover, examination on sorbent characteristic change and kinetics calculation were also carried out in this study.</p></div><div><h3>Significant finding</h3><p>Optimum operating temperature was reached by the application of 600 and 500 °C for De-S and GGBS slag, respectively. The higher CO<sub>2</sub> concentration and 5 % water vapor improved the sorbent utilization. However, excessive water vapor and low fluidized velocity decreased the performance of sorbent. De-S slag performed better on overall CO<sub>2</sub> capture process compared to GGBS slag. Therefore, upscaled study with 10 times greater size was further conducted with the 150–300 µm De-S slag for the CO<sub>2</sub> capture from oxy-fuel and air combustion. The higher CO<sub>2</sub> partial pressure in the flue gas of oxy-fuel combustion increased the capture process efficiency.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140844173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Exploring efficient H2-production photocatalysts is very important for converting solar energy to chemical energy. Some approaches were developed to prevent the recombination of photogenerated electron-hole pairs, ultimately enhancing the photocatalytic H2 production activity.
Methods
3D flower-like MoS2 nanomaterials were surface-modified by the Ni complex as the redox mediator to make the composite photocatalysts. This work investigated the effect of zeta potential on the Ni-complex loading, charge separation, and photocatalytic H2 production activity of MoS2.
Significant findings
The Ni-complex with central cation can be loaded on MoS2 with negative zeta potential due to the columb attraction force. The photogenerated carriers can transfer from MoS2 to the central Ni ion of the complex due to the ligands-stabilized multiple oxidation states of Ni, leading to suppressed charge recombination. The FE-TEM mapping and XPS confirm the loading of Ni complex. The photoluminescence, photocurrent response, and EIS tests confirm the improved photoinduced charge separation of the Ni complex-modified photocatalyst. The flower-like microstructure of MoS2 provides a large specific surface area and high light absorption. The H2 production activity of MoS2-Ni complex photocatalyst (3320 μmol g−1 h−1) is higher than that of the pristine MoS2 photocatalyst (2576 μmol g−1 h−1).
背景探索高效的产生 H2 的光催化剂对于将太阳能转化为化学能非常重要。方法用镍络合物作为氧化还原介质对三维花状 MoS2 纳米材料进行表面修饰，制成复合光催化剂。本研究探讨了Zeta电位对MoS2的镍络合物负载、电荷分离和光催化产H2活性的影响。重要发现：中心阳离子的镍络合物可以负载在负Zeta电位的MoS2上。由于配体稳定了 Ni 的多重氧化态，光生载流子可以从 MoS2 转移到络合物的中心 Ni 离子上，从而抑制了电荷重组。FE-TEM 图谱和 XPS 证实了 Ni 复合物的负载。光致发光、光电流响应和 EIS 测试证实，镍络合物修饰的光催化剂改善了光诱导电荷分离。MoS2 的花状微观结构具有较大的比表面积和较高的光吸收能力。MoS2-Ni 复合物光催化剂的 H2 生成活性（3320 μmol g-1 h-1）高于原始 MoS2 光催化剂（2576 μmol g-1 h-1）。
{"title":"Enhanced photocatalytic H2 production activity by loading Ni complex on flower-like MoS2 nanomaterials","authors":"Arul Pundi , Zheng-Ting Tsai , Jemkun Chen , Yuan-Hsiang Yu , Chi-Jung Chang","doi":"10.1016/j.jtice.2024.105530","DOIUrl":"https://doi.org/10.1016/j.jtice.2024.105530","url":null,"abstract":"<div><h3>Background</h3><p>Exploring efficient H<sub>2</sub>-production photocatalysts is very important for converting solar energy to chemical energy. Some approaches were developed to prevent the recombination of photogenerated electron-hole pairs, ultimately enhancing the photocatalytic H<sub>2</sub> production activity.</p></div><div><h3>Methods</h3><p>3D flower-like MoS<sub>2</sub> nanomaterials were surface-modified by the Ni complex as the redox mediator to make the composite photocatalysts. This work investigated the effect of zeta potential on the Ni-complex loading, charge separation, and photocatalytic H<sub>2</sub> production activity of MoS<sub>2</sub>.</p></div><div><h3>Significant findings</h3><p>The Ni-complex with central cation can be loaded on MoS<sub>2</sub> with negative zeta potential due to the columb attraction force. The photogenerated carriers can transfer from MoS<sub>2</sub> to the central Ni ion of the complex due to the ligands-stabilized multiple oxidation states of Ni, leading to suppressed charge recombination. The FE-TEM mapping and XPS confirm the loading of Ni complex. The photoluminescence, photocurrent response, and EIS tests confirm the improved photoinduced charge separation of the Ni complex-modified photocatalyst. The flower-like microstructure of MoS<sub>2</sub> provides a large specific surface area and high light absorption. The H<sub>2</sub> production activity of MoS<sub>2</sub>-Ni complex photocatalyst (3320 μmol g<sup>−1 h<sup>−1</sup></sup>) is higher than that of the pristine MoS<sub>2</sub> photocatalyst (2576 μmol g<sup>−1 h<sup>−1</sup></sup>).</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140843139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-02DOI: 10.1016/j.jtice.2024.105525
Wei Guo , Wei Wei , Yue Tang , Rujing Shen , Xin Liu , Yihang Li , Ang Wei
Background
Constructing heterojunction photocatalyst is a well-established strategy for enhancing photocatalytic Cr(VI) reduction due to the heightened separation and transfer of photocarriers. Whereas, aimless and random transfer of photocarriers and low photocarrier utilization rate deriving from the weak interface interaction between heterojunction and Cr(VI) are still limited the photocatalytic reduction performance of Cr(VI).
Methods
Herein, a flower-like core-shell heterojunction photocatalyst was designed by wrapping a pyridine-based Cr(VI) imprinted polymer (PCIP) onto flower-like BiOI to achieve spatial separation of photocarriers and selective adsorption of Cr(VI), resulting in an outstanding photocatalytic reduction performance of Cr(VI).
Significant findings
In the core-shell heterojunction, photocarriers could be spatially separated, and then brought about high-efficient photocatalytic Cr(VI) reduction close to the selective adsorption sites of Cr(VI). After measurement, the optimal PCIP@BiOI core-shell heterojunction, polymerized for ≈30 min, exhibited a robust photocatalytic reduction performance of Cr(VI), without adding any free radical sacrifice agents. Within 1 h, the aqueous solution containing 100 mg/L of Cr(VI) could be completely removed, and the photocatalytic reduction rate constant of Cr(VI) was ≈20 times superior to BiOI. This study presents a methodology for designing core-shell heterojunction photocatalysts on the basis of inorganic/organic conjunction for environmental remediation of high concentrations of Cr(VI).
{"title":"Spatial separation of photocarriers and selective adsorption on flower-like core-shell heterojunction of Cr(VI) imprinted polymer@BiOI for boosted photocatalytic Cr(VI) reduction","authors":"Wei Guo , Wei Wei , Yue Tang , Rujing Shen , Xin Liu , Yihang Li , Ang Wei","doi":"10.1016/j.jtice.2024.105525","DOIUrl":"https://doi.org/10.1016/j.jtice.2024.105525","url":null,"abstract":"<div><h3>Background</h3><p>Constructing heterojunction photocatalyst is a well-established strategy for enhancing photocatalytic Cr(VI) reduction due to the heightened separation and transfer of photocarriers. Whereas, aimless and random transfer of photocarriers and low photocarrier utilization rate deriving from the weak interface interaction between heterojunction and Cr(VI) are still limited the photocatalytic reduction performance of Cr(VI).</p></div><div><h3>Methods</h3><p>Herein, a flower-like core-shell heterojunction photocatalyst was designed by wrapping a pyridine-based Cr(VI) imprinted polymer (PCIP) onto flower-like BiOI to achieve spatial separation of photocarriers and selective adsorption of Cr(VI), resulting in an outstanding photocatalytic reduction performance of Cr(VI).</p></div><div><h3>Significant findings</h3><p>In the core-shell heterojunction, photocarriers could be spatially separated, and then brought about high-efficient photocatalytic Cr(VI) reduction close to the selective adsorption sites of Cr(VI). After measurement, the optimal PCIP@BiOI core-shell heterojunction, polymerized for ≈30 min, exhibited a robust photocatalytic reduction performance of Cr(VI), without adding any free radical sacrifice agents. Within 1 h, the aqueous solution containing 100 mg/L of Cr(VI) could be completely removed, and the photocatalytic reduction rate constant of Cr(VI) was ≈20 times superior to BiOI. This study presents a methodology for designing core-shell heterojunction photocatalysts on the basis of inorganic/organic conjunction for environmental remediation of high concentrations of Cr(VI).</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":5.7,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140825824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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