INORGANIC CHEMISTRY COMMUNICATIONS
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2022
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IF 3.428
Rui Zhang,Jiacheng Jiang,Kunlin Zeng
Photocatalysts usually exist in powder form, which limits their practical application in photocatalytic degradation of antibiotics in wastewater. To solve this problem. Here, we report the construction of Z-scheme Bi 2 WO 6 /g-C 3 N 4 on activated carbon fiber membrane (ACF) as a thin-film photocatalyst. The catalyst was characterized by XRD , SEM, XPS and other means. Chlortetracycline was used as a model pollutant to study the photocatalytic activity of the sample. According to the results of XPS and XRD, the composite material was successfully prepared. Ultraviolet diffuse reflectance characterization showed that the edge and intensity of the absorption band of the composite material were enhanced. The photodegradation experiment of chlortetracycline shows that 10% Bi 2 WO 6 /g-C 3 N 4 /ACF (area: 4 × 4 cm 2 ) has the best photocatalytic activity. Cycling experiments have proved that the 10% Bi 2 WO 6 /g-C 3 N 4 /ACF composite material has a stable degradation ability during the photodegradation process. Therefore, Bi 2 WO 6 /g-C 3 N 4 /ACF can be used as a recyclable, large surface area photocatalyst to eliminate water Antibiotics in the environment.
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
Journal of Environmental Sciences
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2022
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IF 6.796
Fuyou Du,Zhan Lai,Huiyang Tang,Haiyan Wang,Chenxi Zhao
In this work, a novel dual Z-scheme Bi 2 WO 6 /g-C 3 N 4 /black phosphorus quantum dots (Bi 2 WO 6 /g-C 3 N 4 /BPQDs) composites were fabricated and utilized towards photocatalytic degradation of bisphenol A (BPA) under visible-light irradiation. Optimizing the content of g-C 3 N 4 and BPQDs in Bi 2 WO 6 /g-C 3 N 4 /BPQDs composites to a suitable mass ratio can enhance the visible-light harvesting capacity and increase the charge separation efficiency and the transfer rate of excited-state electrons and holes, resulting in much higher photocatalytic activity for BPA degradation (95.6%, at 20 mg/L in 120 min) than that of Bi 2 WO 6 (63.7%), g-C 3 N 4 (25.0%), BPQDs (8.5%), and Bi 2 WO 6 /g-C 3 N 4 (79.6%), respectively. Radical trapping experiments indicated that photogenerated holes (h + ) and superoxide radicals (•O 2 − ) played crucial roles in photocatalytic BPA degradation. Further, the possible degradation pathway and photocatalytic mechanism was proposed by analyzing the BPA intermediates. This work also demonstrated that the Bi 2 WO 6 /g-C 3 N 4 /BPQDs as effective photocatalysts was stable and have promising potential to remove environmental contaminants from real water samples.
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
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Chunyan Yang,Hua Chai,Peng Xu,Peng Wang,Xiaojing Wang,Tianyao Shen,Qingzhu Zheng,Guangshan Zhang
Atrazine (ATZ), as a widely used s-triazine herbicide, has persistence and biological toxicity in the environment. Photocatalytic technique is considered as sustainable and promising strategy for the degradation of emerging organic pollutants. Thus, 3D/2D Bi 2 WO 6 /g-C 3 N 4 heterojunction photocatalysts were synthesized via one-step hydrothermal method for ATZ degradation. The Bi 2 WO 6 /g-C 3 N 4 -0.15 exhibited 99.96% removal efficiency for ATZ and the rate constant was approximately 25, 4.8 and 10 times greater than the rate constants of Bi 2 WO 6 , g-C 3 N 4 and “Bi 2 WO 6 + g-C 3 N 4 ”, respectively. The influence of synthesis reaction factors of Bi 2 WO 6 /g-C 3 N 4 and various environmental factors including catalyst dosage, ATZ concentration, pH, common anions and HA on photocatalytic property of Bi 2 WO 6 /g-C 3 N 4 were also investigated. The radical-quenching experiments proved that holes (h + ), 1 O 2 and O 2 – played pivotal roles in ATZ degradation in Bi 2 WO 6 /g-C 3 N 4 photocatalytic system. The ATZ degradation pathway involved dealkylation, alkyl hydroxylation, alkyl oxidation, dechlorination-hydroxylation and deamination-hydroxylation reactions, which was proposed by HPLC–MS/MS results and density functional theory (DFT) analysis. Moreover, quantitative structure–activity relationship (QSAR) evaluation showed that the ecotoxicity of many intermediates declined compared with ATZ. The 3D/2D Bi 2 WO 6 /g-C 3 N 4 heterojunction exhibited excellent photostability and pH adaptability, showing efficient practicality in the removal of refractory organic pollutants in wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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分析化学
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产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
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2021
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IF 3.315
Rui Zhang,Kunlin Zeng
Preparation of Z-scheme composite photocatalyst to degrade organic matter in water is the most popular research trend. However, due to the strict requirements of band edge energy level arrangement and interface contact, it is a great challenge to explore suitable photocatalytic materials to form Z-scheme photocatalytic system. In our work, a novel visible light driven double Z-scheme photocatalyst BiSI/Bi 2 WO 6 /g-C 3 N 4 was successfully prepared by hydrothermal synthesis . The physicochemical properties of the materials were characterized by XRD , XPS, SEM, BET, UV–vis, PL , EIS and LC-MS. The photocatalytic degradation of tetracycline (TC), chlortetracycline (CTC) and rhodamine B (RhB) showed that BiSI/Bi 2 WO 6 /(20%) g-C 3 N 4 had the best photocatalytic activity . The results free radical trap experiments demonstrate that h + and O 2 − are the main free radicals in the photocatalytic process. Because of the heterojunction formed between BiSI, Bi 2 WO 6 and g-C 3 N 4 , the electron conduction was accelerated, the photogenerated electrons and holes were separated effectively, and the photocatalytic performance of the composite was improved. Additionally, cycle test showed that BiSI/Bi 2 WO 6 /g-C 3 N 4 hybrid material had stable degradation ability in the process of photodegradation . This unique heterojunction photocatalysis material has broad application prospects in the removal of organic pollutants and environmental treatment.
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
Journal of Water Process Engineering
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2024
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IF 6.3
Yukun Li,Haiyang Zhang,Sen Yao,Cong Chao,Qishi Chen,Junhua Chen,Fengjuan Fan,Hongyuan Jia,Mingjia Dong
Bi 2 WO 6 /g-C 3 N 4 (BC) Z -scheme heterojunction assembled with graphene aerogel (GA) was successfully prepared by a simple hydrothermal associated with natural seasoning method. The physico-chemical, morphological and photoelectric properties of the Bi 2 WO 6 /g-C 3 N 4 /GA (BCGA) composite was characterized by various instruments, and its photocatalysis performance for persulfate (PDS) activation was explored in the removal of ciprofloxacin (CIP) under simulated sunlight (SSL) irradiation. The optimal mass ratio of BC was 30 % (abbreviated as BCGA-30) in BCGA. Under the optimal conditions (10 mg/L CIP, 50 mg/L PDS, pH = 6.66 and 0.2 g/L BCGA-30), the degradation rate of CIP was 94.3 %, which was 4.18 times that of BC. As the carrier of BC, GA could promote the light absorption and the photo-induced electron transfer of BCGA-30. The removal efficiency of CIP was remained at 80.2 % after five cycles, illustrating that BCGA-30 had an excellent repeatability. Based on the results of the energy band structures , HR-TEM, XPS and free radical quenching experiments, the heterojunction type of composites and possible photocatalytic activation mechanism during CIP degradation were confirmed over BCGA-30/PDS/SSL system. The BCGA-30/PDS/SSL system might be a potential treatment process for the removal of antibiotics wastewater.
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
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Ying Du,Linfei Li,Yanting Tang,Juan Li,Quanhui Guo,Guikuan Yue
With the production and application of antibiotics, the generated substandard antibiotic wastewater has brought unprecedented damage to the environment and finally the health of human beings. To alleviate this problem, photocatalytic degradation was proposed, and various catalysts have been developed with high efficiency and low cost. Herein, a novel 0D/3D/2D dual Z-heterojunction photocatalyst CdS QDs/Bi 2 WO 6 /g-C 3 N 4 was constructed by in-situ growth method in order to efficiently degrade multiple antibiotic pollutants. The combination of multi-dimensional materials is more conducive to the close contact between materials and the effective transport of photogenerated carriers. Results reveal that the sample of 75 %CdS QDs/Bi 2 WO 6 /g-C 3 N 4 (denoted as 0.75CSBC) showed the best degradation activity and stability for tetracycline (TC), and the degradation rate could reach 80.83 % within 12 min under visible light irradiation. Based on the detailed analysis of the results from free radical trapping experiment, Mott-Schottky test and liquid chromatography-mass spectrometry (LC-MS) test, the photocatalytic degradation mechanism and pathway were proposed. Besides, 0.75CSBC showed excellent degradation activity for levofloxacin (LVFX), oxytetracycline hydrochloride (OTC) and norfloxacin (NFLX), confirming its good universality. The multi-dimensional dual Z-heterojunction photocatalyst not only provides more active sites but also promotes the efficient migration of photogenerated charge, together with an excellent stability, indicating its wide practical application in the field of photocatalytic wastewater treatment. This work also provides an interesting method for the preparation of multi-dimensional heterogeneous catalysts.
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
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