ACS Applied Nano Materials
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2023
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IF 5.9
Rui Liu,Ru Li,Lei Yang,Rong-Xu Wang,Han-Yang Chen,Nan Wang,Zhi Li,You-Qiang Chen,Seeram Ramakrishna,Yun-Ze Long
Herein, FeOOH quantum dots and a Z-scheme BiVO4/g-C3N4 catalyst were coupled to obtain a Z-scheme heterojunction for photo-Fenton reactions to facilitate the transport of electrons and the generation of radicals. The obtained materials exhibited better visible light-driven photo-Fenton degradation of Rhodamine B, which is 22.06 times as high as pure BiVO4, 18.65 times as high as pure g-C3N4, and 3.44 times as high as BiVO4/g-C3N4, showing great potential in photo-Fenton degradation of pollutants. Moreover, the performance tests, radical capture experiments, and time-resolved fluorescence spectroscopy revealed that electron migration exists between the BiVO4/g-C3N4 and FeOOH-QDs. This composite system accelerates the cycling of Fe3+/Fe2+ during the photo-Fenton process, thus continuously generating reactive species (hydroxyl radicals (−OH) and superoxide radicals (−O2–)), leading to the rapid degradation of organic pollutants.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Zihan Yang,Jingkai Yang,Lixia Li,Wanning Cao,Jiao Zhang,Hongli Zhao,Liqin Wang
The challenge of creating effective S-scheme visible-light photocatalysts persists due to the inactive visible-light-driven component and the low band-gap characteristics of semiconductors. In this work, we developed a novel F-BiVO 4 /g-C 3 N 4 /CdS dual S-scheme photocatalyst using a sonochemical method. The removal efficiency of Cr(VI) and ciprofloxacin (CIP) can reach 98 % and 90 % in 5 min and 30 min, respectively, under simulated solar illumination. The excellent photocatalytic activity can be attributed to the efficient carrier separation and transport with the help of internal electric field at the interface. This work also reveals the reduction process of Cr(VI), as well as the intermediates and pathways involved in the CIP degradation, taking into account practical situations and expanding its potential applications. This research presents promising prospects for the design of bismuth-based dual S-scheme heterojunctions in the field of environmental remediation.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Hengxin Ren,Jinghang Li,Yanan Niu,Wu Zhang,Yuguang Lv,Ying Wang,Chaoyu Song
This study presents the synthesis and evaluation of a BiVO4/g-C3N4/PANI ternary heterojunction photocatalyst for the degradation of enrofloxacin (ENR) under visible light irradiation. The results demonstrate that the BiVO4/g-C3N4/PANI (10%) composite achieved a 91% removal efficiency of ENR within 120 min, following first-order kinetic behavior. Moreover, the photocatalyst exhibited stable degradation performance and maintained structural integrity after five consecutive cycles. The photocatalyst was characterized by XRD, SEM, TEM, FT-IR, XPS, and UV–vis DRS. The enhanced photocatalytic performance is attributed to the Z-scheme charge transfer mechanism facilitated by PANI, which enhances the separation of photogenerated carriers and reduces their recombination rate. Radical scavenging experiments and ESR spectroscopy confirmed that superoxide radicals (•O2–) and hydroxyl radicals (•OH) play dominant roles in the degradation process. Additionally, 15 degradation products of ENR were identified, and four major degradation pathways were proposed. The findings provide a theoretical basis for the application of this ternary heterojunction in environmental remediation and highlight its potential for efficient degradation of antibiotics.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Zengyue Chen,Yunfeng Li,Fei Tian,Xin Chen,Zhansheng Wu
In this work, a green reaction route for the preparation of BiVO 4 /g-C 3 N 4 composite is constructed using the acetic acid and reusable ethylene glycol system combined with the microwave method. The rice grain-like BiVO 4 is successfully deposited on the surface of hollow tubular g-C 3 N 4 to form a S-scheme heterojunction within 25 min. The performance of the prepared photocatalysts is evaluated by removing glyphosate, methyl orange and tetracycline hydrochloride from simulated agricultural and urban runoff. The degradation evaluation results show that acetic acid in this route could play a better induction role compared to the conventional inducer nitric acid, while the ethylene glycol in this route can be recycled. The recovery of ethylene glycol could reach more than 85%, and the performance of the produced photocatalyst will not be decreased after the recovery of ethylene glycol reaches 20 times. The BV/CN 60 -R 20 sample has the highest photocatalytic activity for glyphosate removal under simulated sunlight irradiation, which is 14.5 times and 9.7 times higher than that of pure BiVO 4 and g-C 3 N 4 , respectively. In summary, the establishment of the ethylene glycol and acetic acid system not only provides a new perspective for the replacement of strong acids in the preparation of BiVO 4 -based photocatalyst but also provides a reference for the construction of other harmless and recyclable systems.
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
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Guanshu Zhao,Jing Ding,Fanyang Zhou,Xueqi Chen,Liangliang Wei,Qingwei Gao,Kun Wang,Qingliang Zhao
Inefficient utilization of photo-induced charge carriers and low recyclability are limitations for photocatalyst to get access to the practical application. A novel ternary BiVO 4 /g-C 3 N 4 /NiFe 2 O 4 composite with dual Z-scheme heterojunction was successfully developed and constructed to enhance the separation of photo-induced charge carriers and the absorption range of visible light. The structure, composition, morphology, magnetic, and optical properties of this photocatalyst were investigated comprehensively. The photocatalytic performance, mechanism, and pathway of ofloxacin degradation under visible light were studied. Results indicated that the internal interaction between different semiconductors presented the successful fabrication of ternary composite, and its red shift of adsorption range of visible light contributed to an enhancement of photocatalytic ability. The as-prepared ternary composite exhibited highest photocatalytic removal rate constant for ofloxacin, which was 3.8, 16.3 and 71.2 times as much as that of the pure BiVO 4 , pure g-C 3 N 4 and pure NiFe 2 O 4 , respectively. The five successive recycling experiments exhibited the high photocatalytic stability of the as-prepared catalyst, with simple recovery operation due to its magnetic property. The holes and superoxide radicals dominated the photocatalytic degradation process of pollutants. A dual Z-scheme heterojunction other than conventional heterojunction was responsible for the enhancement on redox capacity and the separation of charge carriers. Different transformation products during ofloxacin photocatalytic degradation were identified and transformation pathway was put forward. This study provides a promising strategy on the application of visible-light-driven photocatalysts in water treatment.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2020
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IF 7.1
Yunlei Zhou,Yue Wang,Shurong Li,Xi Fang,Huanshun Yin,Po Wang,Shiyun Ai
Photoelectrochemical (PEC) immunosensor was designed to detect N 1 -methyladenosine (m 1 A), where BiVO 4 /g-C 3 N 4 heterojunction was employed as photoactive material, polyamidoamine (PAMAM) and 4-carboxyphenylboronic acid (CPBA) were used as m 1 A antibody immobilization matrix, and Ti-based metal-organic framework encapsulated heterostructure of TiO 2 @NH 2 -MIL-125(Ti) was adopted as signal amplification. Due to the interaction between TiO 2 and phosphate, TiO 2 @NH 2 -MIL-125(Ti) was captured after immunoreaction between m 1 A and its antibody, which can further improve the detection sensitivity with increased PEC response. Under optimal experimental conditions, this method presented wide dynamic range (0.05–35 nM) with the low determination limit (16.7 pM, S/N = 3). This detection strategy showed good detection reproducibility, stability and selectivity. This method was applied to assess the effect of antibiotics on m 1 A content in the leaves, stems and roots of rice seedlings.
研究领域:
分析化学
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环境科学
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材料科学
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生物化学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2018
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IF 3.057
Yang Li,Xinyan Xiao,Zhihao Ye
A novel ellipsoidal (t-s) BiVO 4 modified g-C 3 N 4 composite photocatalyst was fabricated via a facile two-step synthesis strategy in the assistance of ultrasonic and magnetic stirring method. In this typical process, (t-s) BiVO 4 was prepared by using a modified polyol method, and the coupling process of (t-s) BiVO 4 with g-C 3 N 4 was executed after ultrasonic treatment in the ethanol system. The photocatalytic activity of the as-obtained composites was evaluated by monitoring the degradation process of Rhodamine B (RhB) under the simulated sunlight irradiation. The results revealed that the highest degradation efficiency can reach up to 97.7% in 120 min when the mass ratio of (t-s) BiVO 4 and g-C 3 N 4 came to be 1:16. And the optimum degradation rate was 0.03088 min −1 , which was 4.6 and 47.5 times faster than that of the bare g-C 3 N 4 and (t-s) BiVO 4 , respectively. The trapping experiments were conducted to verify that h + and secondary·O 2 - radicals were the main active species in the photocatalytic process. The enhanced photocatalytic performance can be attributed to the synergetic effect of the heterojunction formed at the interface of g-C 3 N 4 and (t-s) BiVO 4 , which resulted in the enlarged optical absorption range and improved separation ability of photo-induced carriers.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
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IF 5.7
Feihu Mu,Shengpan Xu,Meixin Li,Yuqiu Yang,Xiaozhong Chu,Zhipeng Cheng,Xujing Guo,Jiming Xu,Benlin Dai,Chang-Ha Lee
Large amounts of carbon are stored primarily in dissolved organic matter (DOM), which plays an important indicator of lake eutrophication. However, removing DOM from eutrophic lakes remains a major challenge. Herein, a novel S-scheme flower-like microsphere BiVO 4 /nanosheet g-C 3 N 4 3D/2D heterojunction was successfully constructed using a two-step method for DOM degradation of real eutrophic lake water in the presence of peroxydisulfate (PDS). 1.0-BiVO 4 /g-C 3 N 4 /PDS exhibited highly efficient photocatalytic performance with an 87.8 % removal rate of DOM for 60 min, which was 5.3 and 8.9 times higher than BiVO 4 /PDS and g-C 3 N 4 /PDS, respectively. Sulfate radical (·SO 4 − ), hydroxyl radical (·OH) and singlet oxygen ( 1 O 2 ) were mainly responsible for DOM degradation in the 1.0-BiVO 4 /g-C 3 N 4 /PDS system, and the transformation pathway of 1 O 2 was emphatically analyzed. In addition, the changes of fluorescence components in DOM were detected using synchronous fluorescence spectra, second derivative spectra, and two-dimensional correlated spectroscopy analysis. Humic-like fluorescence, fulvic-like fluorescence, and protein-like substances were removed higher than 85.30 %, 73.02 %, and 67.23 % by the 1.0-BiVO 4 /g-C 3 N 4 catalyst activating the PDS under visible light (VL), respectively. When the toxicity of catalytically treated eutrophic lake water was estimated by growth inhibition of Escherichia coli , the biotoxicity of DOM decreased continuously in the BiVO 4 /g-C 3 N 4 /PDS/VL coupling process. Theoretical calculations and photoelectrochemical tests suggested that the BiVO 4 /g-C 3 N 4 /PDS catalytic activity enhancement was attributed to the S-scheme mechanism and hybrid advanced oxidation process. It is expected that this work can provide new insight into DOM degradation in eutrophic lake water by the heterogeneous photocatalysis combined with the PDS activation system.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
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