COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Zhuofan Han,Dengjie Zhong,Yunlan Xu,Haixing Chang,Lin Dong,Yi Liu
In this study, based on Ag@AgCl/tubular g-C 3 N 4 (Ag@AgCl/TCN) composite, Ag nanoparticles were deposited on its surface to form Ag nanofilm enhanced composite through photoreduction of excessive silver nitrate solution to obtain Ag nanofilm Ag@AgCl/TCN photocatalyst . Finally, Ag nanofilm Ag@AgCl/TCN/Ti photoanode was successfully prepared by silica-sol drop-coating method, and assembled with Cu 2 O/Cu cathode to construct a photocatalytic fuel cell (PFC). Ag nanofilm can not only enhance the light absorption and utilization of Ag@AgCl/TCN/Ti, but also extend its light response wavelength to visible light , and be used as an electron transfer medium to reduce internal resistance. The photocurrent density and the photoconversion efficiency of the Ag nanofilm/Ag@AgCl/TCN/Ti are 8.01 mA·cm −2 and 1.24%, respectively, which are 2.49 and 2.54 times those of the Ag@AgCl/TCN/Ti photoanode, respectively. The first-order kinetic constant and the maximum power density of the Ag nanofilm-coated Ag@AgCl/TCN/Ti-Cu 2 O/Cu PFC system are 0.064 min −1 and 46.37 μW·cm −2 , respectively, which are 1.39 and 1.94 times those of the Ag@AgCl/TCN-Cu 2 O/Cu PFC system, respectively. In addition, it degraded more than 95% of rhodamine B, 72.68% of tetracycline and 54.25% of bisphenol A within 60 min. The excellent performance of Ag nanofilm/Ag@AgCl/TCN/Ti-Cu 2 O/Cu is due to the strengthening of Ag nanofilm and the formation of S-type heterojunctions between AgCl and TCN. Free radicals (•Cl, h + , •OH, •O 2 - ) and non-radicals ( 1 O 2 ) are involved in the degradation reaction of RhB degradation. It is worth noting that 6% Ag nanofilm/Ag@AgCl/TCN/Ti-Cu 2 O/Cu has a positive effect on the production of •O 2 - , and its output is approximately 1.89 times that of the Ag@AgCl/TCN/Ti-Cu 2 O/Cu. A series of material characterization experiments have been completed and possible mechanisms of operation have been proposed. This study provides a new scheme for the design and preparation of high-efficiency photoanode of PFC.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Xin Yu,Chao Zhou,Zhanhua Huang,Changhui Xin,Yanjing Lin,Fengdan Fu,Shijie Li,Weiping Zhang
Achieving high-efficiency charge separation and strong oxidizing capacity are of great significance for photodegradation of organic pollutants . Herein, novel self-doped Zr 3+ -ZrO 2 nanoclusters and AgCl@Zr 3+ -ZrO 2 heterostructures with high surface areas were fabricated for photodegradation of organic pollutants under visible-light illumination. The experimental results revealed that self-doped Zr 3+ -ZrO 2 clusters were formed during a carbothermal reduction process, and the adsorbed surface chlorine promoted the adhesions of Ag + to form AgCl over the surface of Zr 3+ -ZrO 2 clusters. The obtained AgCl@Zr 3+ -ZrO 2 heterojunctions displayed ultrahigh-performance degradation of norfloxacin under visible-light illumination, and the prepared AgCl@Zr 3+ -ZrO 2 -11 heterojunction presented the highest photocatalytic performance with a rate constant of 0.21989 min −1 , which was approximately 62.12 times that of Zr 3+ -ZrO 2 clusters and 21.95 times that of AgCl and far better than that of commercial ZrO 2 . The formation of Zr 3+ self-doping, strongly combined interfaces, and high surface areas highly promoted charge separation for highly enhanced photodegradation of organic pollutants.
研究领域:
材料科学
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环境科学
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纳米技术
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光催化
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Jiajie Yu,Dongping Sun,Tianhe Wang,Feng Li
Conventional ZnO powder catalysts possess excellent stability and photocatalytic activity, but have great difficulties for separation and regeneration after the reaction and require ultraviolet irradiation (less than 5% of solar energy), thus restricting practical applications. In this paper, unique short submicron wire-like ZnO films were successfully prepared on silicate glass substrates by calcination of spin-coated zinc acetate solution in the presence of ethanolamine (EA). A typical synthesis yields ZnO submicron wires with ca. 50–120 nm in diameter, 15–30 μm in length and 0.5–1.5 μm in height. Ag@AgCl particles were deposited on short ZnO submicron wire films by a simple impregnating-precipitation-photoreduction method. The as-prepared Ag@AgCl/ZnO film exhibited efficient photocatalytic performance under visible light irradiation and excellent self-cleaning capability under solar light. This film photocatalysts were easy to separate from the reaction, and the tests showed that the films were reusable for four times without significantly loosing efficiency. Additionally, gas chromatography–mass spectroscopy (GC–MS) was applied to investigate the degraded chemical species resulted from the photo-catalytic degradation of methylene blue (MB) and methyl orange (MO) dyes under Ag@AgCl/ZnO. A possible photocatalytic mechanism was proposed based on the photoelectrochemical measurements and radical trapping experiments.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Yilan Liu,Qingyu Lei,Jun Chen,Kaiyi Chen,Xin Wang,Jiamin Wei,Lianshe Fu,Rute A.S. Ferreira,Wei Dai,Tinghai Yang
Constructing heterojunctions to suppress the recombination rate of electron−hole pairs is an effective method for improving photocatalytic efficiency. However, the transfer rate of active species has rarely drawn attention. In this study, a nanoporous CoY-MOF photocatalyst with a channel transfer effect is developed. It is formed by one Co 3+ ion, one Y 3+ ion, and three deprotonated pyridine carboxylate ligands through coordination bond. Furthermore, a Z-scheme heterojunction CoY-MOF/AgCl composite photocatalyst is successfully constructed by coupling the nanoporous CoY-MOF with AgCl. The heterojunction interface of CoY-MOF/AgCl enhances significantly the separation efficiency of photogenerated electrons and holes, utilizes effectively charge carriers, and strengthens photocatalytic performance. More importantly, the channel transfer effect of the nanoporous MOF promotes the rapid migration of active species, increasing the transfer rate of reactants to the active species. The synergistic effect of these two aspects further improves the degradation efficiency of organic pollutants. Under visible light irradiation, the degradation efficiency of tetracycline (TC) for CoY-MOF/AgCl-35 within 21 min is approximately 87.56 %, which is higher than that of pure CoY-MOF (47.80 %) and AgCl (54.42 %). This paper provides a new strategy for constructing highly efficient heterojunction engineering in photocatalysis.
研究领域:
材料科学
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环境科学
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纳米技术
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光催化
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无机化学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
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2025
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IF 4.9
Junlong Zhang,Jie Wei,Long Yang,Ao Cao,Zehao Sun,Youxin Yuanfeng,Xuyu Shen,Bing Chen,Guogang Chen
With the rapid advancement of modern industry and population growth, unrestrained discharge of industrial effluent and domestic sewage has caused severe environmental pollution, which poses a severe challenge to human habitat. Owing to the unique eco-friendly characteristics, photocatalytic technology has emerged as a highly promising approach in the wastewater treatment very recently. Z-scheme heterojunction ternary photocatalysts of “ x · AgCl/ y · CoWO₄/Ag” were ingeniously designed and developed in this study, exhibiting exceptionally high photocatalytic activity for degrading micropollutants in wastewater compared with single-component photocatalysts. For instance, photocatalytic activity of AgCl/CoWO₄/Ag (reflected by the reaction kinetic parameter k ) is 7.7 times that of AgCl and 313 times that of CoWO₄, respectively. The experimental results and analysis revealed a typical Z-scheme charge transfer mechanism in these ternary photocatalyst heterojunctions, thereby confirming the structural characteristics of Z-scheme heterojunction. Furthermore, the ternary photocatalysts retained the reaction activity with virtually no change after undergoing five cycles of catalytic experiments, highlighting its excellent stability. Consequently, an underlying mechanism was proposed herein to account for the enhanced photocatalytic properties. It is believed that such ternary Z-scheme heterojunction materials expand halide-based heterojunction construction methods and promise significant implications for environmental remediation.
研究领域:
环境科学
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材料化学
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光催化化学
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纳米材料
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污染治理
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能源与环境技术
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产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2025
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IF 4.6
Shenglong Chen,Qiang Zhou,Xiaojing Liu,Hongyan Guan,Peng Dong,Hongman Hou,Gongliang Zhang,Jingran Bi,Shuang Yan,Hongshun Hao
In this study, a novel Z-scheme ZnO-AgCl-Ag photocatalyst was prepared by converting the metal-organic framework ZIF-8 to ZnO via a simple pyrolysis method and using a physical wet mixing method. The crystal structure, microstructure, elemental distribution, and photoelectrochemical properties of the catalyst were systematically characterized using various analytical techniques. The characterization results showed that the introduction of AgCl/Ag into ZnO exhibited a higher light absorption capacity as well as a lower transmission resistance. Photocatalytic degradation experiments showed that the ZA-3 sample achieved a 99.97 % degradation rate of 10 mg/L RhB in 24 min, which was 2.3 higher than that of ZIF-8-derived ZnO. In addition, we systematically investigated the effects of initial RhB concentration, solution pH, anion interference, and catalyst recycling cycle on the photocatalytic activity, demonstrating the stability and applicability of the composites under different conditions. In addition, radical trapping experiments were conducted to probe the photocatalytic reaction mechanism, and a Z-scheme charge transfer pathway was confirmed, in which photogenerated electrons were effectively separated and transferred at the Z-scheme heterojunction interface through the conductive channel of Ag nanoparticles as carriers, which significantly improved the photocatalytic activity. In this study, the advantages of MOFS were rationally and effectively utilized to design and prepare Z-scheme photocatalysts with UV–visible response.
研究领域:
材料科学
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环境科学
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纳米技术
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光催化
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
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2015
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IF 4.074
Zidan Zhou,Xinwen Peng,Linxin Zhong,Lan Wu,Xuefei Cao,Run Cang Sun
Electrospun cellulose acetate (CA) membrane was employed as a support that provided sites for AgCl crystals in situ growth. The Ag@AgCl crystals on electrospun CA composites with exposed {1 0 0} and {1 1 1} facets were fabricated at room temperature by a double diffusion technique. The crystal structure, morphology, composition, and absorption light ability of CA supported Ag@AgCl were characterized utilizing X-ray powder diffraction (XRD), scanning electron microscopy (SEM), attenuated total reflection-infrared intensity (ATR-IR), X-ray photoelectron spectroscopy measurements (XPS), energy dispersive spectrometer (EDS) and ultraviolet–visible (UV–vis) diffuse reflectance spectra, respectively. The photocatalytic activity of the catalysts was evaluated using methyl orange (MO) as a target. The CA supported cubic Ag@AgCl catalyst exhibited much higher catalytic activity than octahedral catalyst in terms of the degradation of MO under visible light. The 10 mg CA based cubes could completely degrade MO (10 mg L −1 ) in 160 min. The photocatalyst still exhibited a good catalytic ability after three times.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
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2024
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IF 2.9
Zou Sujing,Mao Xiqiang,Wu Lei,Li Yang,Li Jun,Yang Jian,Fan Ximei
Photocatalysis technology is considered as a most promising method to decompose organic pollutant since the inexhaustible solar energy and facile reaction condition. Herein, a series of flower-like Ag/AgCl/BiOCl photocatalysts are successfully synthesized via hydrothermal and photochemical deposition method. All the samples are investigated and characterized by X-Ray diffraction, Scanning electron microscopy, transmission electron microscope, ultraviolet–visible spectroscopy and Photoluminescence to insight into the microstructures and optical properties. During the photocatalytic degradation of Methyl orange experiments, the optimized Ag/AgCl/BiOCl sample prepared by photoreduction with 40 min exhibits the excellent photocatalytic performance. Under visible-light irradiation for 60 min, degradation rate of Methyl orange reaches 97%, which is 9.7, 6.1 and 4.6 times higher than that of AgCl, Ag/BiOCl and BiOCl, respectively. The UV–vis diffuse reflectance and Photoluminescence spectra of the Ag/AgCl/BiOCl photocatalyst verify that the enhanced photocatalytic activity is ascribed to its extended absorption range to visible-light region and the efficient separation efficiency of photogenerated carriers. In addition, the radical trapping experiment demonstrates that photogenerated hole and superoxide radicals play critical roles in the methyl orange degradation. The corresponding photocatalytic degradation mechanism is proposed that the excellent photocatalytic activity is attributed to the surface plasmon resonance effect of metallic Ag and heterojunction structure of Ag/AgCl/BiOCl photocatalysts.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Tianqi Liu,Hailian Huang,Yunzong Liu,Konstantinos Papadikis,Beata Layla Mehdi,Pow-Seng Yap,Graham Dawson
A novel magnetic quinary nanocomposite, protonated g-C 3 N 4 /Fe 3 O 4 /AgBr/AgCl/AgI, was synthesized using a wet chemical method. The multi-heterojunction photocatalyst with multi carrier source and multi-channel carrier transport is constructed to enhance the photocatalytic degradation performance of pure g-C 3 N 4 . The design of the quinary nanocomposite is also an effective approach solving the chemical stability problem of silver halides. The photocatalytic degradation efficiency under visible light irradiation was analyzed for methylene blue (MB) as the target organic pollutant. The quinary nanocomposite with 10 % g-C 3 N 4 displayed high photocatalytic performance, with 83 % of MB degraded under 6 h LED white light irradiation. The effective quinary nanocomposite has good magnetic properties and can be magnetically separated to prevent secondary pollution of the photocatalyst in water. The band gap of protonated g-C 3 N 4 /Fe 3 O 4 /AgBr/AgCl/AgI was found to be lower than pure g-C 3 N 4 . Parameters such as initial concentration of pollutant, initial solution pH, and light source were studied. Zeta potential results showed that the quinary nanocomposite could disperse homogenously to decrease aggregation in the solution. The photocatalytic mechanism was investigated, and the mineralization results were analyzed based on liquid chromatography-mass spectroscopy (LC-MS) and total organic carbon (TOC). It was found that the hydroxyl and superoxide radicals were major reactive species by scavenging experiments. Additionally, protonated g-C 3 N 4 /Fe 3 O 4 /AgBr/AgCl/AgI nanocomposite showed excellent reusability after magnetic separation and regeneration, thus suggesting it to be a promising photocatalyst for treating wastewater containing organic contaminants.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
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2022
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IF 8.943
Lina Wang,Hanpei Yang,Li Kang,Mi Wu,Yuankun Yang
In this work, Ag/AgCl/FeOCl (Ag–Fe) catalysts were successfully prepared via multistep routes in which Ag was uniformly anchored to the enriched Cl sites provided by exfoliated FeOCl nanosheets. Among these Ag–Fe catalysts, 5% Ag–Fe exhibited the highest pseudo first-order kinetic constant 0.1056 min −1 for photo-Fenton degradation of Rhodamine B (RhB), which was 11 times higher than that of FeOCl (0.0096 min −1 ). Ag–Fe catalysts exposed more coordinatively unsaturated Fe active sites to coordinate with H 2 O 2 due to the cleavage of Fe–Cl bond. The exposed coordinatively unsaturated Fe(III) active sites could capture the photoinduced electrons and reduce them to Fe(II), which boosted the separation efficiency of photogenerated charge carriers. Meanwhile, the photogenerated electrons of Ag 0 transferred to the FeOCl, promoting the reduction of Fe(III) to Fe(II). In addition, the intensified visible light adsorption (SPR effect) was achieved after introducing Ag/AgCl nanoparticles on exfoliated FeOCl. Hydroxyl radicals (·OH) and holes (h + ) were determined as the main reactive oxidative species (ROS) in the photo-Fenton degradation process.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
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2017
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IF 2.594
Qingyong Li,Guorong Duan,Jie Luo,Xiaoheng Liu
In this study, the Ag/AgCl/WO 3 plasmonic Z-scheme photocatalysts with different contents of Ag/AgCl nanoparticles (NPs) were prepared through a facile ultrasonic precipitation method in geothermal water , wherein the geothermal water served as the chlorine source. Then the photocatalytic activity was investigated by degradation of 4-Aminobenzoic acid (4-ABA) under visible-light irradiation. It was found that the as-prepared 50 wt% Ag/AgCl/WO 3 photocatalyst showed the highest photocatalytic efficiency with 25.12 and 3.53 times higher than those of pure WO 3 and Ag/AgCl, respectively. The active species trapping experiments indicated that h + and ·O 2 − were key factors in 4-ABA photodegradation process. The possible plasmonic Z-scheme photocatalytic mechanism of photocatalytic reaction for 4-ABA degradation was proposed based on systematical characterizations. We hope this paper could give new ideas for further exploiting geothermal energy to design and fabricate highly efficient visible-light-driven photocatalysts for environmental remediation.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
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2025
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IF 12.5
Wenfan Yu,Jianchun Li,Chang Li,Wentao Liu,Shifeng Zhang
Photocatalysis has emerged as one of the most promising technologies for formaldehyde purification owing to its green, safe, and cost-effective properties. However, most photocatalysts exhibit poor light absorption properties and exist as powders, limiting their large-scale application. To address this challenge, Ag-AgCl@TiO 2 @cellulose nanofiber porous composites were prepared by integrating the photocatalysts into a cellulose matrix through physical/chemical dual crosslinking, photoreduction, and freeze-drying. The materials exhibited excellent mechanical properties due to the hydrogen bonding and electrostatic adsorption interactions between the components. Moreover, the porous composites exhibited excellent synergistic adsorption–photocatalytic degradation performance for formaldehyde. This is attributed to the abundant polar functional groups in the cellulose nanofibers and the heterostructure formed by TiO 2 , Ag, and AgCl. The composites achieved a maximum photocatalytic degradation rate of 99.54 %. After five cycles of reuse, they still maintained a high degradation efficiency of 99.07 %, demonstrating excellent recyclability. Compared with similar materials, the synthesized porous composites performed well in terms of degradation rate, maximum degradation efficiency, and cyclic reutilization performance. In summary, this study provides an innovative approach to air purification.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）