JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Chenglong Liu,Jiacheng Jin,Fan Dong,Zhipeng Zhang,Daolin Zhou,Mingxin Jin,Haohao Wan,Min Shao,Yushan Wan
This article aims at preparing of Z-scheme heterojunction NiCo-LDH/Bi 2 WO 6 (LDH: layered double hydroxides) via a solvothermal technique, addressing the rapid recombination of electron-hole pairs caused by the narrow bandgap of Bi 2 WO 6 . Successful loading of NiCo-LDH onto Bi 2 WO 6 was confirmed through various characterization techniques, assessing the composite's crystal structure, morphological traits, and performance. Notably, the NiCo-LDH/Bi 2 WO 6 composite exhibited excellent photocatalytic performance in the degradation of tetracycline (TC), achieving an optimal reaction rate of 0.03 min −1 , which is 4.8 times faster than that of Bi 2 WO 6 alone. The findings demonstrate that the formation of the heterojunction structure facilitated the separation of photogenerated electron-hole pairs by reducing recombination in monomers. Free radical trapping experiments showcased that the decomposition of TC is primarily driven by h + and ∙O 2 − . Additionally, liquid chromatography-mass spectrometry analysis identified the degradation products of TC and suggested two potential degradation pathways. The present research provides a novel approach for preparing LDH photocatalytic materials using NiCo-LDH/Bi 2 WO 6 .
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
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Wenzhuang Wang,Xinhang Cong,Xuehan Zhang,Wenling Xu,Jianli Diao,Yongming Bao,Feng Guo
A heterojunction of bismuth oxybromide (BiOBr) and graphitic carbon nitride (g-C 3 N 4 ) was synthesized via an in situ deposition method for the selective photocatalytic oxidation of benzyl alcohol to benzaldehyde without the need for additional oxidants. The optimized BiOBr/g-C 3 N 4 (2:1) sample demonstrated a significant enhancement in benzaldehyde production (36.08 %) compared to pure g-C 3 N 4 (15.48 %), with improved selectivity (64.06 % compared to 29.66 % for g-C 3 N 4 ) under mild conditions (atmospheric pressure, 20°C). Structural and photoelectric property analyses, along with DFT calculations, revealed the synergistic interactions between the two components, elucidating the charge transfer mechanism and the role of the S-scheme heterojunction in enhancing photocatalytic performance. Free-radical-capture experiments identified electrons (e-) and holes (h+) generated within the BiOBr/g-C 3 N 4 system as the primary reactive species responsible for the oxidation of benzyl alcohol. This study demonstrates the potential of the BiOBr/g-C 3 N 4 composite as an advanced photocatalyst for chemical transformations, showcasing its effectiveness without the need for additional oxidants.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 11
·6732-6744
·
IF 4.22
You Junhua,Wang Lu,Bao Wanting,Yan Aiguo,Guo Rui
Abstract The visible-light-responsive composite photocatalyst is beneficial to improve the solar energy utilization efficiency through the coupling of narrow bandgap materials. In this work, CdS nanowires were prepared by hydrothermal method, and then BiOBr/CdS composite materials with different mass ratios were successfully prepared by a simple two-step sonography-precipitation method using CdS nanowires as a deposition template. The photocatalysts were characterized by XRD, SEM, XPS, TEM, and other methods. Rhodamine B (RhB) was used as a model pollutant to evaluate the photocatalytic activity of BiOBr/CdS catalysts with different mass ratios. The photocatalytic test results show that the composite photocatalyst containing 60% BiOBr has the highest photocatalytic activity, which indicates that it is related to the decrease in photogenerated charge recombination rate. Subsequently, the electrochemical and physical methods were used to illustrate the electron transfer mechanism and the main active center of the as-prepared samples. Free radical capture experiments reveal that holes are the main active species in the photocatalytic process of composite samples. Graphical abstract BiOBr/CdS composite photocatalyst was prepared by a simple precipitation method using dispersed one-dimensional CdS nanowires as a template. BiOBr/CdS heterostructure combined adsorption and catalysis to degrade RhB molecules more efficiently. Free radical trapping experiments reveal that holes are the main active species in the photocatalytic process of composite samples.
研究领域:
材料科学
·
环境科学
·
光电催化
✓ 已验证
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Benjie Zhu,Guofei Jiang,Yan Lv,Fang Liu,Juan Sun
In oilfield produced water, polyacrylamide (PAM) is a kind of organic polymer , which may gradually degrade to produce a large number of acrylamide (AM) monomer , and cause great damage to the peripheral nervous system of human and animals. In order to improve its removal efficiency, rGO@Fe 3 O 4 /Cu 2 O@ZnO magnetic composites with strong hydrophobicity , high photocatalytic performance and recyclability was prepared. The degradation process of PAM on composites photocatalyst was studied by simulating the sunlight irradiation, and the magnetic recovery performance and photocatalytic stability of composite were explored. Finally, the photocatalytic degradation mechanism of rGO@Fe 3 O 4 /Cu 2 O@ZnO composite was discussed by free radical capture experiment. The results showed that the highest photocatalytic degradation efficiency was 97.3% when the mass ratio of GO@Fe 3 O 4 and Cu 2 O@ZnO was 1:5, the dosage of rGO@Fe 3 O 4 /Cu 2 O@ZnO was 0.6 g L −1 , pH value was 7 and the initial concentration of PAM was 100 g L −1 . After four cycles, the magnetic recovery and degradation efficiency of PAM can still up to 91.3% and 81%, respectively, which both meet the needs of magnetic recovery and photocatalysis . In addition, according to the free radical capture experiment, the main active species was superoxide radical (·O 2− ). This work provides a strategy for designing magnetic composites with hydrophobic and high catalytic for photodegradation of organic pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 18
·8566-8577
·
IF 3.3
Tingting Tang,Bo Jin,Ping Zhao
Aromatic nitro compounds are the main components of explosives. They are not only explosive and dangerous but also have high toxicity and high stability in the human body, soil, and water resources, destroying the ecological environment. Herein, a simple hydrothermal method is used to successfully prepare layered MIL-100 (Fe). A series of aromatic nitro compounds including p-nitrophenol (PNP), nitrobenzene (NB), dinitrotoluene (2,4-DNT), dinitrophenol (2,4-DNP), and 2,4,6-trinitrophenol (2,4,6-TNP) were degraded by the photo-Fenton method. The MIL-100 (Fe) photo-Fenton agent can almost completely degrade PNP within 2 min. Similarly, it has a good degradation effect on other pollutants. Finally, the mechanism of the photo-Fenton reaction was discussed by product analysis and free radical capture experiments after the photochemical reaction. This study demonstrates the potential application value of MIL-100 (Fe) as a photo-Fenton reagent to degrade nitroaromatic explosives.
研究领域:
环境化学
·
材料科学
·
催化化学
·
环境污染与控制
·
应用化学
✓ 已验证
DOI
高影响因子
CHEMISTRY & BIODIVERSITY
·
2024
·
IF 2.3
Jingmei Li,Yuhao Ji,Baitao Xian,Jianlai Liu,Deye Qu,Deming Han
In this experiment, Bi2Sn2O7/ZnO composite photocatalytic materials were synthesized by a hydrothermal method and characterized by XRD, SEM, and EDS, etc. The prepared Bi2Sn2O7/ZnO has a nanorod structure and high phase purity. The photocatalytic antimicrobial performance of Bi2Sn2O7/ZnO against bacteria and fungi under visible light was significantly better than that of single Bi2Sn2O7 and ZnO. In particular, 1000 mg/L 1:3 Bi2Sn2O7/ZnO showed an antimicrobial rate of more than 97% against Escherichia coli, Staphylococcus aureus, and Candida albicans, which are widely present in the nature. The free radical trapping experiments were selected and the antimicrobial mechanism was investigated, and the results showed that the antimicrobial process of the Bi2Sn2O7/ZnO system was regulated by the free radicals such as ·OH, h+, and e-, which were generated by its unique photocatalytic activity. Finally, MTT cytotoxicity experiments demonstrated that the Bi₂Sn₂O₇/ZnO composite was not toxic to cells. In addition, the antimicrobial performance of Bi2Sn2O7/ZnO on real livestock wastewater and the real-life application of the prepared Bi2Sn2O7/ZnO PCL composite antibiotic film for antimicrobial treatment of freshly cut fruits' surfaces under visible light were experimentally investigated. This study provides a new idea for Bi2Sn2O7/ZnO as a photocatalytic antimicrobial agent.
研究领域:
微生物学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 43
·期 7
·2888-2898
·
IF 3.201
Wei Ma,Na Wang,Yao Lu,Ziyang Lu,Xu Tang,Songtian Li
A novel magnetic double-conductive photocatalyst of Fe3O4@Bi2O3/C was successfully prepared by microwave and deposition technology, and it showed satisfactory photocatalytic activity in the degradation of tetracycline compared with that of pure Bi2O3 under visible light. The improved degradation efficiency of the as-prepared Fe3O4@Bi2O3/C is attributed to the better conductivity of biomass carbon and Fe3O4 quantum dot, which significantly inhibited the recombination of electron–hole pairs and improved the optical absorption. In addition, the mechanism exploration of the radical trapping experiments and ESR measurement indicated that h+, ˙O2− and ˙OH participated in the tetracycline removal procedure. The possible photocatalytic reaction mechanisms including transfer behavior of charge carriers and the intermediate products of tetracycline degradation were also revealed in depth. This work provides a promising approach to construct a biomass carbon-based photocatalyst for the wastewater treatment.
研究领域:
环境科学
·
材料科学
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Pingping Teng,Jiabao Zhu,Zhiang Li,Kang Li,Nigel Copner,Shuai Gao,Enming Zhao,Xiaoliang Zhu,Zhihai Liu,Fengjun Tian,Yu Zhang
In this paper, one-dimensional PAN-Bi 2 O 2 CO 3 –BiOI photocatalytic nanofibers were prepared using flexible PAN nanofibers as carriers. Bi 2 O 2 CO 3 was first grown on the surface of PAN nanofibers, and then BiOI was loaded on Bi 2 O 2 CO 3 by ion exchange method. The characterization results showed that PAN-Bi 2 O 2 CO 3 –BiOI nanofibers have a diameter of about 210 nm and regular fiber morphology. The results of UV–Vis diffuse reflectance spectroscopy, XRD and XPS showed that Bi 2 O 2 CO 3 –BiOI composed of granular semiconductor nano heterostructures with high specific surface area were uniformly loaded on the surface of PAN fiber . The photocatalytic degradation experiment of the material showed high visible light photocatalytic activity . The preparation of Bi 2 O 2 CO 3 –BiOI heterojunction improved the photoelectron hole separation efficiency of BiOI under visible light. PAN-Bi 2 O 2 CO 3 –BiOI fibers showed high photocatalytic degradation efficiency for rhodamine B. The degradation efficiency was more than 95% within 120 min irradiation. Free radical trapping experiments showed photocatalysts mainly produced O 2 − ,·OH and h + , which played a major role in photocatalysis .
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 MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 4
·1-16
·
IF 2.8
Wu Sheng,Wang Tingting,Li Yingwei
A novel 3D octahedral BiOBr/UiO-66 heterostructure photocatalyst was synthesized through the in-situ growth of BiOBr nanosheets on octahedral UiO-66 at ambient temperature. This heterojunction of type II exhibits a substantial specific surface area, promoting intimate interfacial contact which favors carrier transmission and enhances the contact area of the semiconductor surface reaction. The morphology and structure of the catalyst were characterized via SEM and TEM. Transient photocurrent and electrochemical impedance spectroscopy confirm the advantageous nature of the heterojunction for carrier separation. Further investigation delves into the photocatalytic degradation of RhB. After 70 min of light irradiation, the removal rate of RhB reached a remarkable 94.9% using the 60% BiOBr/UiO-66 composition. Furthermore, the apparent kinetic constant of the 60% BiOBr/UiO-66 was measured to be 0.03522 min −1 , surpassing pure BiOBr (0.01238 min −1 ) by a factor of 2.9 and UiO-66 (0.00035 min-1) by a factor of 100. Experiments involving free radical capture provide evidence that superoxide radicals (·O 2− ), electrons(e − ) and holes (h + ) are the principal active species during the photodegradation process. Accordingly, a proposed photocatalytic mechanism for the BiOBr/UiO-66 heterojunction emerges.
研究领域:
材料科学
·
纳米技术
·
环境科学
·
光催化
·
无机化学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2022
·
IF 6.137
Xiaoxuan Kang,Xigai Jia,Ziyang Kang,Yuchen Zhang,Dongbin Zhang,Jilun Wei,Aihong Guo,Ming Ge,Zhangxing He
N-doped biochar (N-BC) was prepared from black fungus by coupling a hydrothermal method with thermal pyrolysis , and the physicochemical properties of N-BC were characterized in detail by various techniques. As-synthesized N-BC exhibited a better catalytic performance to activate peroxydisulfate (PDS) for tetracycline (TC) degradation compared with as-obtained N-doped hydrochar (N-HC), N-doped calcined carbon (N CC) and most of the reported carbon catalysts. After reaction of 60 min, 89.8% of TC (20 mg/L) was degraded by N-BC/PDS oxidation system, and TC degradation obeyed the pseudo-second-order kinetic with a reaction rate constant at 0.843 L⋅mg −1 ⋅min −1 . The effect of some important parameters (N-BC dosage, PDS dose, initial TC concentration, solution pH, reaction temperature and inorganic anions) on TC degradation was also investigated and analyzed. The radical trapping experiments, EPR test, and electrochemical analysis confirmed that TC degradation in N-BC/PDS system was achieved via the radical (SO 4 •− , ‧ OH) and non-radical ( 1 O 2 , electron transfer) pathways, and the later played the dominant role. Finally, the performance of N-BC/PDS oxidation system for the removal of TC from the different real water matrices was studied. This study provided a new material for the preparation of highly active PDS catalyst for the treatment of antibiotic wastewater.
研究领域:
环境科学
·
化学工程
·
水处理
·
催化
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Wen Lu,Chen Wang,Yanan Han,Yuxuan Bai,Siyi Wang,Wenke Xi,Jianjun Wang
Covalent organic frameworks (COFs) have been widely used based on their ordered pore structure, inherent porosity, high specific surface area and excellent stability. Herein, the active two-dimensional COF (named HDU-25) photocatalyst was preformed by the solvothermal method, and the structure and morphology were characterized and analyzed. The effects of key factors on rhodamine B (RhB) degradation by HDU-25 were evaluated. The results showed that under suitable conditions, HDU-25 exhibited an excellent photocatalytic degradation rate of 99.9% for persulfate-assisted photocatalytic degradation of RhB, and HDU-25 also had superior stability and reusability. In addition, the mechanism of RhB degradation was investigated using free radical capture experiments and electron spin resonance (ESR) experimental analysis. The intermediates were detected by high performance liquid chromatography-mass spectrometry (HPLC-MS), and possible degradation pathways were suggested. The results of this research highlight the potential of HDU-25 photocatalysts to degrade organic dyes in wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Jiabao Gu,Qianwen Li,Xuanyu Long,Xiaohan Zhou,Nan Liu,Zequan Li
In this study, we synthesized the MBSr (MIL-88A(Fe)/BiOBr/SrFe 12 O 19 ) dual Z-scheme heterojunction via an accessible hydrothermal method and investigated the photocatalytic performance of MBSr composites for Rhodamine B (RhB) and Methylene blue (MB). The MBSr-1% photocatalyst exhibited excellent photocatalytic performance, resulting the degradation rate of RhB reached approximately 96.2% within 60 min, which was higher than that of M88 (34%), BiOBr (89%) and M88/BiOBr-7% (93.7%) composites. And the MBSr-1% could eliminate 90.1% of MB within 90 min, which displayed the best photodegradation efficiency of prepared photocatalysts. The enhanced photocatalytic performance can be ascribed to the formation of dual Z-scheme heterojunction, which enhanced visible-light absorption and facilitated the transfer of photoinduced carriers. The MBSr-1% was proved to have excellent stability and reusability after six-recycling run. Furthermore, the major reactive species were h + , •O 2 − and •OH by radical trapping experiments. Finally, a possible photocatalytic pathway and mechanism of MBSr photocatalysts was proposed.
研究领域:
材料科学
·
环境科学
·
化学
·
纳米技术
·
光催化
✓ 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）