JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Yanyan Cui,Ping Zhang,Mengke Li,Chengcheng Lin,Yaling Wang
Photocatalysis technology is considered an effective way to solve the problem of water pollution and energy shortage, and is hinged on the development of the photocatalyst . In this study, p-type semiconductor AgFeO 2 and the n-type photocatalyst Ag 3 VO 4 formed a p-n junction via a simple hydrothermal method . Compared with pure Ag 3 VO 4 , the 4 % AgFeO 2 -modified Ag 3 VO 4 photocatalyst (AgVFe-4) exhibited the best photocatalytic activity: the photodegradation rate of RhB reached 95.1 % within 60 min and possessed good photostability under UV–visible light irradiation. The physical and chemical properties of AgVFe-4 indicated that the composite structure showed a larger special surface area, much lower intensity of photoluminescence , and higher photogenerated carriers separation efficiency. The p-type AgFeO 2 and n-type Ag 3 VO 4 could form the p-n junction structure. Based on the analysis of reactive agents, the h + , •O 2 − and •OH were the main active species during organic pollutions photodegradation, and the photocatalysis process followed the Z-scheme mechanism. Meanwhile, some silver element in the photocatalyst was reduced into Ag 0 , which could act as the recombination center of the photogenerated carriers, further improving the photocatalytic performance. This work may arouse an increasing interest in designing more Z-scheme silver-based p-n junction heterojunction photocatalysts.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
INORGANIC CHEMISTRY
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2026
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IF 4.6
Fu-Long Lu,Shu-Jie Feng,Yong-Fei Ji,Yun-Yun Wu,Xiu-Shuang Yang,Hao-Yu Ma,Wen-Sheng Zhang,Dong-Dong Qin,Wei Wang,Dong-Xue Han,Li Niu
Oxidase-like colorimetric sensors based on crystalline vanadates show great potential for polyphenol detection without H2O2. However, most inorganic nanozymes possess multienzyme activities and follow the “on-to-off” sensing mode, limiting sensitivity and accuracy in complex matrices. Herein, a flower-like α-Ag3VO4 nanozyme was synthesized via a Tollens reagent-mediated method. Distinct from conventional vanadate-based materials, it activates O2 molecules adsorbed on its oxygen-defective (010) surface through 0.86 eV energy transfer, thereby exerting exclusive oxidase-like activity with O2•– and 1O2 as electron acceptors. EGCG accelerates charge transfer and boosts catalytic activity by over 6-fold within 1 min, allowing for an “off-to-on” colorimetric sensor. This unique phenomenon enables the construction of a rapid colorimetric sensor based on an “off-to-on” signal model, which differs fundamentally from reported nanozyme-based colorimetric systems for reducing targets. Compared with the widely used aluminum chloride method (detection limit, LOD = 3.54 μM), the proposed sensor exhibits excellent specificity, superior sensitivity (LOD = 0.16 μM) for EGCG, and comparable accuracy in real sample analysis. This work not only provides a synthetic chemistry approach to tailor the enzyme-like activity of inorganic materials but also offers a promising platform for the sensitive detection of reducing polyphenols.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2023
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IF 5.7
Zhixin Chen,Boyuan Ning,Yanqing Cai,Minghua Liu,Pingfan Xu,Peikun Zhang,Guangcan Xiao,Yunhui He
Background The accumulation of antibiotics in water systems has received considerable global attention due to its detrimental effects. There is an urgent need to develop rapid and efficient methods for the degradation of antibiotics. Methods In this work, a highly efficient AgFeO 2 /Ag 3 VO 4 photocatalyst was successfully fabricated by a hydrothermal method and analyzed using different techniques. Under visible light irradiation, photocatalytic behavior of AgFeO 2 /Ag 3 VO 4 heterojunctions in the degradation of levofloxacin is investigated. Significant findings The results showed that p-n heterojunction was formed between AgFeO 2 and Ag 3 VO 4 , which improved the separation and transfer of photogenerated charge carrier under the action of the internal electric field. The apparent reaction rate of AgFeO 2 /Ag 3 VO 4 heterostructure toward degradation of levofloxacin reached to 0.2770 min −1 , which was about 2.15 times and 36.73 times larger than those of Ag 3 VO 4 and AgFeO 2 , respectively, and much larger than other counterparts. Furthermore, possible photocatalytic degradation pathway of levofloxacin was comprehensively determined by LC-MS analysis. This work would provide in-depth understanding on the efficient photocatalytic removal of antibiotics for sustainable environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
FUEL
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2024
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IF 6.7
Ali Junaid,Faiqa Noreen,Abdus Sami,Karam Jabbour,Khadija Bibi,Muhammad Ammar Hassan Shah,Nigarish Bano,Muhammad Shuaib Khan,Asma A. Alothman,Syed Imran Abbas Shah
Pursuit of green hydrogen production is paramount, given escalating energy demands, resulting in quest for electrodes capable of water electrolysis, yielding green H 2 devoid of carbon dioxide, has posed a formidable challenge. Anodes and cathodes crafted from transition metal oxides (TMOs) reign supreme in water splitting due to their robust supporting capacity, potent redox capabilities, facile alteration of valence states, and superior electrical conductivity. In this study, a cutting-edge transition metal oxide nano-composite catalyst, comprised of Ag 3 VO 4 @ZnO, is synthesized via a facile hydrothermal method. Ag 3 VO 4 @ZnO catalyst showcases remarkable electrocatalytic prowess in both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) when deployed in a 1.0 M potassium hydroxide (KOH) electrolyte, having active surface area of 140 cm 2 . Operating at a current density of 10 mA cm −2 , Ag 3 VO 4 @ZnO exhibits diminished overpotentials of 142 mV and 248 mV for HER and OER, respectively. Furthermore, it demonstrates lower Tafel slopes of 92 mV dec −1 and 46 mV dec −1 , alongside reduced charge-transfer resistances of 153 Ω.cm 2 and 2.60 Ω.cm 2 for HER and OER, respectively. Ag 3 VO 4 @ZnO showcases largest active surface area, minimal Tafel slope, and lower charge transfer resistance. Practical two electrode configuration exhibited exceptional 50-hour stability, along with Tafel slope values of 73 and 98 mV dec −1 for OER and HER, respectively. The reliable performance of electrode material in practical device configuration, makes it a practically viable alternative for current state-of-the-art catalysts.
研究领域:
材料科学
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可再生能源
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电化学
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高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2021
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IF 3.927
Hongjun Fang,Yusong Pan,Haixian Yan,Linfeng Xu,Chengling Pan
Novel plasmonic photocatalysts have been extensively investigated because of their advantages in efficient light absorption and surface plasmon resonance effect (SPR). Herein, plasmon-induced BiPO 4 /Ag/Ag 3 VO 4 heterostructures were constructed by in-situ partially reduction along with hydrothermal approach. Photo-degradation results revealed that BiPO 4 /Ag/Ag 3 VO 4 -1.2 (abbreviation as Bi/Ag-1.2) product presented a significant enhancement of photoactivity for Methyl orange-MO, Congo red-CR and tetracycline-TC degradation under visible light irradiation, which was higher than that of pristine BiPO 4 and Ag/Ag 3 VO 4 , respectively. Moreover, this excellent performance of Bi/Ag-1.2 was mainly ascribed to the synergistic effect consisting of intimate heterostructure between BiPO 4 and Ag/Ag 3 VO 4 and SPR effect of Ag, thus ensuring an accelerated separation and transfer of photo-generated carriers and promoting the absorbance of visible light. The trapping test and electron spin resonance further demonstrated that h + and ·O 2 − species are the vital active species in the photocatalytic reaction. Meanwhile, a plausible photocatalytic mechanism induced by plasmon-based heterojunctions was systematically proposed.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Hao Du,Ningyi Li,Lingxuan Yang,Qiang Li,Guoxiang Yang,Qi Wang
Environmental crisis caused by Cr(VI) pollution has gained remarkable attention. Developing efficient photocatalysts for Cr(VI) remediation remains a great challenge. Herein, the Ag@Ag 3 VO 4 /Ag 3 PMo 12 O 40 (Ag@Ag 3 VO 4 /AgPMo) S-scheme heterojunctions were prepared via the combination of hydrothermal and photodeposition methods for Cr(VI) reduction. The resultant S-scheme heterojunctions were characterized to investigate their morphological, structural, photoelectrochemical and optical properties. The synergy of surface plasmon resonance (SPR) effect of Ag and S-scheme hetero-structure improved their photo(electro)chemical performance. Upon visible light irradiation, the optimized Ag@Ag 3 VO 4 /AgPMo delivered superior photoreduction efficiency (94.8%) of Cr(VI) and stability with a slight loss of the performance (92.8% after 6 cycles). The enhancement of Cr(VI) reduction performance may be ascribed to the extended light absorption range and separation and migration pathway of photo-induced electron-hole pairs confirmed by the proposed photoreduction mechanism. This work not only confirms a highly active catalytic system for the light-driven environmental application, but pave a way for the construction of S-scheme heterojunction photocatalysts.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）