CHEMOSPHERE
·
2022
·
IF 8.943
Bingzhi Yu,Wen Yan,Yunjuan Meng,Yinan Zhang,Xizi Li,Yan Li,Yuchi Zhong,Jiafeng Ding,Hangjun Zhang
Environmental-friendly and efficient strategies for triclosan (TCS) removal have received more attention. Influenced by COVID-19, a large amount of TCS contaminants were accumulated in medical and domestic wastewater discharges. In this study, a unique g-C 3 N 4 /Bi 2 MoO 6 heterostructure was fabricated and optimized by a novel and simple method for superb photocatalytic dechlorination of TCS into 2-phenoxyphenol (2-PP) under visible light irradiation. The as-prepared samples were characterized and analyzed by XRD, BET, SEM, XPS, etc. The rationally designed g-C 3 N 4 /Bi 2 MoO 6 (4:6) catalyst exhibited notably photocatalytic activity in that more than 95.5% of TCS was transformed at 180 min, which was 3.6 times higher than that of pure g-C 3 N 4 powder. This catalyst promotes efficient photocatalytic electron-hole separation for efficient dechlorination by photocatalytic reduction. The samples exhibited high recyclable ability and the dechlorination pathway was clear. The results of Density Functional Theory calculations displayed the TCS dechlorination selectivity has different mechanisms and hydrogen substitution may be more favorable than hydrogen abstraction in the TCS dechlorination hydrogen transfer process. This work will provide an experimental and theoretical basis for designing high-performance photocatalysts to construct the systems of efficient and safe visible photocatalytic reduction of aromatic chlorinated pollutants, such as TCS in dechlorinated waters.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2014
·
IF 6.007
Haiping Li,Jingyi Liu,Wanguo Hou,Na Du,Renjie Zhang,Xutang Tao
Heterojunctions of graphitic carbon nitride (g-C 3 N 4 ) and Bi 2 MoO 6 were solvothermally synthesized and characterized by X-ray diffraction, Fourier transform-infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy (TEM) and high resolution TEM. The photocatalytic degradation activity of the g-C 3 N 4 /Bi 2 MoO 6 composites for Rhodamine B was examined under visible light irradiation. The heterojunction composites exhibited higher photocatalytic activity than pure g-C 3 N 4 or Bi 2 MoO 6 . The photocatalytic activity of the composites increased then decreased with increasing Bi 2 MoO 6 content. The g-C 3 N 4 /Bi 2 MoO 6 heterojunction with a Bi 2 MoO 6 content of 16.1 wt.% exhibited the highest photocatalytic activity, and its photocatalytic efficiency was more than three times those of pure g-C 3 N 4 or Bi 2 MoO 6 . The enhanced photocatalytic activity of the g-C 3 N 4 /Bi 2 MoO 6 heterostructure photocatalyst was attributed predominantly to the efficient separation of photoinduced electrons and holes. The g-C 3 N 4 /Bi 2 MoO 6 heterojunction photocatalyst exhibited excellent stability and reusability. A detailed mechanism for the enhanced photocatalytic activity is discussed. Superoxide radicals were the major active species. This study provides a visible light responsive photocatalyst with potential in environmental remediation applications.
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
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2024
·
IF 8
Xianhua Liu,Miao Liu,Yexin Dai,Jinran Cui,Asad Jamil,Wanxin Liu,Jiaxuan Li,Jiao Wang
Constructing a photocatalytic membrane and photo-Fenton reaction coupling system is a novel strategy to enhance the photocatalytic activity of the membrane and eliminate the problem of membrane contamination. Herein, a g-C 3 N 4 /Bi 2 MoO 6 /PVDF photocatalytic membrane was prepared using a tannic acid-assisted in-situ deposition method. The membrane was characterized by three advantages of photocatalytic, self-cleaning, and antibacterial properties. Under the photo-Fenton-like conditions, the membrane had superior photodegradation efficiency of 90.7% for tetracycline, one of the main antibiotic contaminants in the China's aquatic system. Moreover, the membrane had excellent photo-Fenton self-cleaning ability, its flux recovery rate was up to 96%–98% after the self-cleaning process. Photoluminescence spectra, diffuse UV–visible spectrum, transient photocurrent responses, and electrochemical AC impedance spectrum results show that the heterojunction structure formed by g-C 3 N 4 and Bi 2 MoO 6 could improve the separation efficiency of photogenerated electrons-hole pairs. Electron spin resonance spectroscopy confirmed the photo-electrons facilitated the formation of hydroxyl radical (·OH) in the existence of H 2 O 2 , which enhanced tetracycline degradation. Moreover, the superior photo-Fenton self-cleaning performance, which mainly relied on the active free radicals produced by the photo-Fenton-like membrane to remove dirt on the membrane surface or in the membrane pore channel. Our results may shed new light on the development of promising photocatalytic membrane systems by coupling with photo-Fenton-like processes, and facilitate their applications for wastewater treatment .
研究领域:
环境科学
·
材料科学
·
废水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Minjia Meng,Binrong Li,Yu Zhu,Yongsheng Yan,Yonghai Feng
Photocatalytic materials can be used as self-cleaning functional materials to alleviate the irreversible fouling of ultrafiltration membranes. In this work, the small size g-C 3 N 4 /Bi 2 MoO 6 (SCB) blended polysulfone (PSF) ultrafiltration membranes was fabricated by hydrothermal and phase inversion methods. As a functional filler of ultrafiltration membranes, the small size g-C 3 N 4 nanosheet decorated on the surface of Bi 2 MoO 6 can enhance the photocatalytic performance for bovine serum albumin (BSA) degradation, and remove irreversible fouling under visible light irradiation . In addition, the introduction of SCB microspheres into PSF matrix obviously increased the porosity of ultrafiltration membranes. Therefore, the SCB-PSF ultrafiltration membranes displayed excellent antifouling performance (flux recovery ratio is 82.53%) and BSA rejection rates (94.77%). SCB-PSF also had high photocatalytic self-cleaning activity, indicating excellent application prospects in organic wastewater treatment .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
DESALINATION
·
2026
·
IF 9.9
Zhouxiao Zhai,Jingce Bi,Linshan Wang,Ningning Liu,Yi Wang,Xia Zhang,Zhuopeng Wang,Yide Han
A g-C 3 N 4 /Bi 2 MoO 6 /Bi 2 WO 6 ternary heterojunction was constructed via simple mechanical grinding and thermal treatment. • GBMW follows a dual Z -scheme charge-transfer pathway, preserving strong redox capability for enhanced photocatalysis. • U(VI) acts as an electron acceptor to promote charge separation and improve photocatalytic performance. Due to the difficulty of conventional photocatalytic systems in simultaneously achieving strong oxidation and reduction processes, the treatment of wastewater containing coexisting uranium and organic pollutants remains a critical challenge in the field of photocatalysis. Herein, a novel g-C 3 N 4 /Bi 2 MoO 6 /Bi 2 WO 6 (GBMW) ternary photocatalyst with a dual Z -scheme heterojunction architecture was rationally constructed for the removal of U(VI) and tetracycline (TC) under visible-light irradiation. The dual Z-scheme heterojunction extends the visible-light response range and accelerates interfacial charge transfer, while preserving strong redox potentials. Within 100 min, GBMW achieves a U(VI) reduction efficiency of 91.6% and a TC degradation efficiency of 97.6%, with corresponding k obs values of 0.02332 and 0.03664 min −1 , respectively, which are significantly superior to those of BiMO, BiWO, GCN and GBW. Notably, U(VI) can act as an efficient electron acceptor to promote the separation of electrons and holes in GBMW, which significantly facilitates the degradation of TC. Moreover, GBMW demonstrates excellent stability and anti-interference performance in various real water matrices. This work not only provides a feasible strategy for constructing high-efficiency dual Z -scheme heterojunctions photocatalysts, but also offers an effective solution for treating complex wastewater containing coexisting organic pollutants and radioactive contaminants. Download: Download high-res image (264KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Wei Liu,Jiabin Zhou,Ying Zhou,Dan Liu
Non-steroidal anti-inflammatory drugs (NSAIDs) are a kind of emerging pollutants that have caused people's concerns. In this work, the catalytic system with perovskite-like material Bi 2 MoO 6 modified graphitic carbon nitride (g-C 3 N 4 ) combined with peroxymonosulfate (PMS) was constructed to efficiently degrade nimesulide (NIM) in water. After the characterization by various technologies, it was found that the g-C 3 N 4 @ Bi 2 MoO 6 composite possessed an increased specific surface area, enhanced light absorption range, and lower recombination rate of the photogenerated carriers. Thereby the composites displayed stronger photocatalytic activity than pure g-C 3 N 4 and Bi 2 MoO 6 . The introduction of PMS not only provided more reactive oxygen species (ROSs) for the photocatalytic system, such as SO 4 − and 1 O 2 but also further promoted the transfer of photogenerated electrons. The multiple active species that existed in the system were involved in the photocatalytic process so that 97.4% NIM was degraded with 12 min. The degradation path of NIM was analyzed by LC-MS detection, which revealed that the structure of NIM was decomposed by the cleavage of the phenyl ether bond. The detection results of the total organic carbon (TOC) indicated that the proposed method could enhance the mineralization efficiency of NIM. This work could propose a solution for the rapid removal and degradation of NSAIDs in water.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Qin Jiao,Binchuan Gao,Li Zhang,Ruijie Chen,Lei Wang,Qiang Wang,Nengjie Feng,Hui Wan,Guofeng Guan,Mingjuan Han
The photocatalytic performance of graphitic carbon nitride (g-C 3 N 4 ) in the conversion of CO 2 to CH 3 OH is intrinsically constrained by its limited selectivity and activity. Herein, we developed a dual-modification strategy that integrates S doping into the g-C 3 N 4 (CN) skeleton and constructed a 2D/2D S-doped g-C 3 N 4 /Bi 2 MoO 6 Z-scheme heterojunction (SCN/BMO) via microwave-assisted synthesis. This strategy achieved sulfur doping through N-site substitution to modulate the electronic structure of CN, resulting in the formation of a 2D/2D SCN/BMO Z-scheme heterojunction. The optimized 0.3SCN/BMO photocatalyst achieved a methanol production rate of 6.19 μmol·g −1 ·h −1 with 99.15 % selectivity under solar irradiation, showing a 5.16-fold and 2.60-fold enhancement in catalytic activity compared to pristine g-C 3 N 4 and Bi 2 MoO 6 (BMO), respectively. Meanwhile, it demonstrated excellent photocatalytic and structural stability during the cycling tests. Systematic characterization analyses have revealed that the synergistic light-harvesting effect, optimized interfacial coupling, and efficient charge transport pathways within the 2D/2D 0.3SCN/BMO Z-scheme heterostructure collectively contribute to the significant enhancement in photocatalytic performance. Moreover, a feasible photocatalytic mechanism has been put forward by combining the outcomes of in-situ DRIFT spectroscopic analysis with DFT computational modeling. This research finding provides an innovative strategy for the development of highly efficient photocatalysts, which are specifically designed for the selective reduction conversion of CO 2 to CH 3 OH.
研究领域:
材料科学
·
环境科学
·
催化
·
纳米技术
·
物理化学
·
能量转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.4
Hongxia Zhang,Junxin Huang,Ming Zhong,Fangzhen He,Na Dong,Bitao Su,Ziqiang Lei
To address the remediation needs of antibiotic-contaminated water, this study developed a highly efficient and stable novel photocatalyst. A 2D/3D S-scheme g-C 3 N 4 /Bi 2 MoO 6 (CN/BMO) heterojunction was synthesized via a simple preparation method, with its core mechanism relying on the internal electric field (IEF) formed at the semiconductor interface. This field actively regulates the S-scheme charge transfer pathway, a process directly validated through a series of photoelectrochemical analyses: significantly quenched photoluminescence signals and shortened carrier lifetimes confirmed efficient interfacial recombination, while enhanced photocurrent responses and reduced electrochemical impedance indicated effective spatial separation of electron-hole pairs. The optimized carrier separation efficiency significantly improved the photocatalytic performance of the material. Under visible light irradiation, the degradation efficiency of tetracycline (TC) reached 85%, with degradation rates exceeding 80% for multiple antibiotic pollutants. Additionally, the material exhibited excellent stability in five consecutive cycling experiments. Mechanistic studies revealed that the synergistic effect of superoxide radicals ( · O 2 − ) and photogenerated holes (h + ) dominated the reaction process, as conclusively verified by electron paramagnetic resonance (EPR) spectroscopy. Degradation pathway analysis via mass spectrometry (MC-LS) demonstrated that TC primarily undergoes cleavage through demethylation, hydroxylation, and ring-opening reactions, with simultaneous assessment of the toxicity and ecological risks of reaction intermediates. This work provides new theoretical foundations and practical solutions for the photocatalytic removal of antibiotics in real water bodies.
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2026
·
IF 9.2
Lin-Yu Jiao,Ze-Long Sun,Wen-Yu Luo,Ying-Ying Xu,Fei Wen,Yanfei Xu,Zhuo Li,Wei Zhao,Shanshan Liu,Mingyue Ding
Sustainable green energy has emerged as critically important topics, with catalytic valorization and utilization of biomass receiving considerable attentions in recent years. This study investigates the photocatalytic selective oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF) using sonochemically synthesized g-C3N4/Bi2MoO6 heterostructured catalyst. A series of composites with varying mass ratios were fabricated, with the 1:1 (w/w) g-C3N4/Bi2MoO6 demonstrating the optimal catalytic performance. Systematic investigations were conducted to elucidate the effects of reaction conditions including irradiation wavelength, solvent polarity, reaction atmosphere, and substrate concentration on photocatalytic efficiency. The system achieved exceptional DFF selectivity of 90.8% with 92.2% HMF conversion under very mild conditions (air atmosphere and 10 W blue LED, 455 nm) with the generation of H2O2 as co-product, demonstrated the extremely high catalytic activity of the catalyst. The catalyst exhibited remarkable stability, as confirmed by recycling tests and post-reaction X-ray diffraction (XRD) characterization. Mechanistic studies through radical quenching experiments and electron paramagnetic resonance (EPR) spectroscopy identified superoxide radicals (·O2−) and photogenerated holes (h+) as the dominant reactive species, propose a dual-pathway oxidation mechanism. In this study, the S-scheme heterojunction charge transfer mechanism was comprehensively validated through systematic characterization and theoretical calculations, highlighting the pivotal role of S-scheme heterojunctions in selective oxidation reactions.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）