COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Jun Liu,Hui Wang,Meng-Jie Chang,Wen-Juan Li,Wen-Yao Zhu,Ge Bai,Liu-Qing Yang,Hui-Ling Du,Zhen-Min Luo,Ting Shang
Metal ion doping is an efficient method to achieve high photocatalytic performance of semiconductors. However, the current synthetic methods by using inorganic salts as doped sources in the precursor reaction system might suffer from ion waste and second pollution. Herein, we developed a novel method by employing electrospun nanofibers as ion reservoir to release metal ions for the synthesis of ion-doped semiconductors with high photocatalytic activity . As demonstrated, Co/Fe co-doped BiOCl photocatalyst (Co/Fe-BOC) was facilely prepared in the presence of CoFe 2 O 4 nanofibers as Co and Fe ion reservoir via a simple solvothermal method . Compared with BiOCl, the resulted Co/Fe-BOC shows increased specific surface area, visible light response as well as separation and transportation efficiencies of photogenerated carriers. Thus, the Co/Fe-BOC exhibits significantly enhanced visible light photocatalytic activity to degrade 99.4% rhodamine B (RhB) within 4 min. This new doping approach not only avoids the ion waste and pollution during the reaction process but also facilitates the separation of the photocatalyst. Moreover, the CoFe 2 O 4 nanofibers could be repeatedly used as ion reservoir to prepare high-performance Co/Fe-BOC. This nanofiber-based ion doping approach provides a novel, universal and promising insight to obtain doped semiconductors with high photocatalytic activity.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
En-Ze Deng,Qijie Mo,Yuying Li,Zongwen Mo,Li Zhang,Jiewei Liu
Although Z-scheme heterojunction composites have been widely studied in photocatalysis, in-depth investigation of oxygen vacancies (Ov) in the Z-scheme photocatalysts is still rare. Herein, an oxygen vacancies modified NU-1000/BiOCl-Ov composite with Z-scheme heterojunction was rationally designed and fabricated. The combination of X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) experiment verified the presence of oxygen vacancies, meanwhile the Z-scheme charge transfer across the heterojunction interface was confirmed in detail by the in situ -XPS, Kelvin probe force microscope (KPFM) studies, ultraviolet photoelectron spectroscopy (UPS), EPR radical capture experiment, as well as density functional theory (DFT) calculation. Importantly, compared to pristine NU-1000 and BiOCl, the optimized NU-1000/BiOCl-Ov composite displayed enhanced photocatalytic performance in the degradation of tetracycline hydrochloride (TCH) under visible light (λ ≥ 400 nm). Theoretical calculations reveal that the oxygen vacancies could induce electron redistribution, facilitating the activation of O 2 and TCH molecules, thereby promoting the photodegradation efficiency. Moreover, mechanism studies suggested that the synergistic effect of oxygen vacancies and Z-scheme heterojunction could facilitate the effective separation of photogenerated carriers. At last, the degradation routes of TCH were proposed and the toxicity of degradation intermediates was assessed. This work underlines the cooperative functions of oxygen vacancies and Z-scheme heterojunction towards improved photocatalytic performance, which offers new perspectives on the design of metal–organic frameworks (MOFs) composites for efficient photocatalysis.
研究领域:
材料科学
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环境科学
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化学
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DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2021
·
IF 6.789
Ying Zhang,Yujie Luo,Shiqi Fu,Xiulong Lv,Qian He,Fangying Ji,Xuan Xu
UVC (wavelength < 280 nm) has a wide range of applications in the field of water disinfection due to its excellent bactericidal performance. In this work, we synthesized an upconversion luminescent material, β-NaYF 4 : Pr 3+ , Li + (NYF), which can generate UVC, and compounded it with a BiOCl photocatalyst to synthesize β-NaYF 4 : Pr 3+ , Li + @BiOCl (NYF-Bi) with a core-shell structure. The NYF-Bi composite material can be driven under visible light and has high photocatalytic activity . The bactericidal performance of NYF and NYF-Bi were evaluated using Escherichia coli , Staphylococcus aureus , Shigella and Salmonella . The NYF-Bi composite material killed 99.99% of E. coli under visible light (λ ≥ 420 nm) within 180 min and maintained high germicidal efficacy after 4 cycles. Finally, we deduced the sterilization mechanism of the NYF-Bi composite material through carrier dynamics studies and catching agent experiments. The death of bacteria was mainly caused by UVC light and active species , including h + , OH, and O- 2. This research provides a new material for water disinfection.
研究领域:
环境科学
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材料科学
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微生物学
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 19
·9195-9206
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IF 3.925
Chengming Deng,Haiming Xu,Hailan Qin,Dongsheng Xia,Dongya Li,Qilin Yu,Dahong Chen,Yi Zheng,Yujia Wang
Enhancing the photocatalytic performance via improving the separation efficiency of photo-induced carriers is a promising strategy. Here, a type-II Bi2S3/BiOCl heterostructure was successfully fabricated by an ultrasound method to tackle this issue. The experimental results revealed that BiS/BOC-4 can purified 89% TC-HCl (20 mg L−1, k = 0.0627 min−1) in 30 min, which was 2.6 and 5.5 fold larger than BiOCl (k = 0.0245 min−1) and Bi2S3 (k = 0.0113 min−1), respectively. Moreover, the mechanism behind the improved photocatalytic activity was derived from the good light-utilization efficiency, eminent adsorption ability, and excellent separation efficiency of the carriers induced by the coupling of the oxygen vacancies (OVs) and the interfacial electric field (IEF). Simultaneously, the structure–activity relationship between the photocatalytic performance and the concentration of OVs was established via the response surface methodology. This work not only provides a promising strategy to ameliorate the photocatalytic activity by syngestic vacancy engineering and heterostructure engineering, but also offers a new angle to understand the relationship between defects and the activity.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
CHEMOSPHERE
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2023
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IF 8.8
Yunlei Zhou,Zhuangzhuang Wang,Huanshun Yin,Xiaoting Cui,Ying Tian,Zhen Qiao,Suo Wang,Runye Hu,Wenjing Lv,An Mao,Jun Wang
2D Ag/BiOCl/Bi 2 O 2 CO 3 S-scheme heterojunction was prepared with oxygen vacancy (OVs) via one-pot hydrothermal method. The XRD and XPS analysis indicated the synthesized sample contained Ag nanoparticles (AgNPs) instead of Ag ions. The SEM and HRTEM pictures showed that BiOCl/Bi 2 O 2 CO 3 nanosheets were modified with AgNPs. Compared with AgNPs, BiOCl, and Bi 2 O 2 CO 3 , Ag/BiOCl/Bi 2 O 2 CO 3 exhibited highly photocatalytic inactivation of pathogenic fungi ( Fusarium graminearum ) due to the wide light absorption range and S-scheme heterojunction structure, which improved the production and transfer of photogenerated carrier, and enhanced the separation of photogenerated e − /h + pairs. In addition, the improved photocatalytic disinfection against Fusarium graminearum of Ag/BiOCl/Bi 2 O 2 CO 3 was verified in Sedeveria Letizia plant . Furthermore, active species capture assay and ESR experiments disclosed the involvement of OVs, h + , ∙O 2 − , ∙OH, and – for Fusarium graminearum destruction during photocatalysis process. The S-scheme heterojunction was proved via oxygen vacancy, which was extensively beneficial to increase charge transmission and separation efficiency. Our work proposed Ag/BiOCl/Bi 2 O 2 CO 3 was an efficient and ecological fungicide to inactive Fusarium graminearum in vitro and vivo for crop disease .
研究领域:
材料科学
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化学
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环境科学
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农业科学
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植物病理学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
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2015
·Vol. 5
·期 61
·49598-49605
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IF 3.84
Jianhua Ge,Xuetao Guo,Xin Xu,Pingping Zhang,Jingling Zhu,Jingbo Wang
Flower-like hierarchical BiOCl structures were successfully synthesized in the presence of a eutectic mixture of choline chloride and urea through a solvothermal process. The as-prepared sample was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), N2 adsorption–desorption analysis, photo-electrochemical analysis and UV-vis diffuse reflectance spectroscopy (DRS). During the reaction process, the eutectic mixture of choline chloride and urea acted not only as the solvent and the template, but also as a chlorine source for the fabrication of flower-like BiOCl. In addition, the photocatalytic activity toward the degradation of RhB in aqueous solution was also investigated. The results showed that the flower-like BiOCl exhibited enhanced photocatalytic activity for the degradation of RhB under sunlight illumination. Meanwhile, the flower-like BiOCl catalyst performed without obvious decrease in activity after five cycles. Furthermore, the main reactive species in the catalytic oxidation reaction were detected through radical trapping experiments.
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
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2021
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IF 3.927
Zhaohui Wu,Zhongfu Li,Min Wu,Jie Shen,Wenhui Feng,Xue Li,Difa Xu,Shiying Zhang,Nan Ma
It is inevitable to form invalid Type I heterostructure of BiOCl/bismuth-based photocatalysts due to the wide bandgap of BiOCl , which could only transfer the charge carriers efficiently, rather than separate. Herein, two-dimensional (2D) Type I van der Waals heterostructure of BiO 2-x /BiOCl nanosheets were prepared through a solvothermal route, and massive defects and multiple pores were in-situ constructed on the BiO 2-x /BiOCl nanosheets simultaneously. The defective and porous van der Waals structure of BiO 2-x /BiOCl ultrathin nanosheets possessing enhanced internal electric field , induced defect level, and reduced interfacial barriers, promoting both efficient transfer and separation of charge carriers. Furthermore, the massive defects of BiO 2-x /BiOCl porous nanosheets provided higher reactivity owing to its more hydrophilic surface . As a result, the BiO 2-x /BiOCl nanosheets boosted the photocatalytic performance of Cr (VI) reduction and Rhodamine B (RhB) degradation when employing LED as simulated solar light. Based on the results, a plausible photocatalytic mechanism of Cr (VI) removal and RhB photodegradation was illustrated. We expected that this work could provide a feasible route to design distinctive heterostructure photocatalysts for improved photocatalytic performances under simulated solar light.
研究领域:
材料科学
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纳米技术
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环境科学
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光催化
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Tong Sun,Kuan Wang,Yuan-Xiao Du,Jian-Gang Chen,Xin-Peng Li,Zhen-Hong He,Xiaodong Hao,Weitao Wang,Huan Wang,Zhao-Tie Liu
The photocatalytic conversion of CO₂ into value-added chemicals using solar energy is a crucial strategy for achieving carbon neutrality. However, existing semiconductor catalyst systems suffer from suboptimal conversion efficiencies due to inefficient charge separation and transfer. The precise modulating surface microenvironment of semiconductor catalyst contributes an effective approach to address these limitations in photocatalytic applications. This study proposes a precise dual-modification strategy to modulate the surface microenvironment by incorporating Co 2+ incorporation and in situ generating Bi sub-nanoclusters in ultrathin BiOCl nanosheets. This approach synergistically establishes spin-polarization effects and interfacial ohmic contacts, while enhancing the intrinsic built-in electric field. Consequently, it drives efficient charge separation and transfer. Mechanistic analyses via theoretical simulations and in situ experiments reveal that the engineered spin polarization facilitates electron transfer through aligned magnetic moments, while the formed ohmic contact eliminates interfacial potential barriers, collectively lowering the energy barrier for CO 2 * and COOH* formation. The optimized 3 %Co-BBOC catalyst demonstrates exceptional CO₂-to-CO conversion performance with a production rate of 58.25 μmol·g −1 ·h −1 , representing a 6.6-fold enhancement over pristine BiOCl. The present work elucidates a dual-functional synergistic mechanism of modulating the surface microenvironment by integrating spin manipulation and interfacial engineering, providing fundamental insights for designing advanced photocatalytic systems with optimized charge transport and surface reaction dynamics.
研究领域:
光催化
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材料科学
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环境科学
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纳米技术
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物理化学
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产品关联
DOI
高影响因子
ChemCatChem
·
2021
·Vol. 13
·期 9
·2293-2302
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IF 5.686
Shouning Yang,Xiaoyang Liu,Sijia Lu,Zhuo Li,Yanmin Zhang,Shaoning Yu,Jian Song,Chuanfan Ding,Huayan Yang
Graphical Environmentally friendly oxidations of aromatic alcohols to aldehydes: ultrathin 2D Bi 2 S 3 −BiOCl heterojunction catalyst with molecule oxygen as oxidant. Novel facile one-pot synthesis of Bi2S3−BiOCl ultrathin hetero-nanosheets for selective alcohol oxidation (Song, Yang and co-workers from Ningbo University Henan Normal University) The development of eco-friendly and low cost catalysts is challenging. Here, heterostructures of Bi 2 S 3 quantum dots (QDs) doped onto ultrathin BiOCl nanosheets were synthesized by a facile hydrothermal method to exploit efficient photosensitizers with appropriate electronic states to enhance the transfer of electrons. The obtained Bi 2 S 3 −BiOCl showed highly efficient photocatalytic ability for selective oxidation of aromatic alcohols to aldehydes. More oxygen vacancies are formed on the exposed 001 facet of the ultrathin BiOCl, which can effectively trap electrons and form .O 2 − radicals. The cooperation between the BiOCl and the Bi 2 S 3 QDs effectively separates photogenerated electron-hole pairs at the heterointerface and facilitates the cooperative actions of .O 2 − radicals and holes, which brings about a desirable photocatalytic efficiency for the selective oxidation of aromatic alcohols. This work highlights the synergistic effect of semiconductor QDs and two-dimensional materials on selective conversion processes and provides a new design paradigm using noble metal-free heteromaterials with high photocatalytic activity. This opens new possibilities for photocatalyst design using heteromaterials with high photocatalytic activity.
研究领域:
催化
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材料科学
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环境科学
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纳米技术
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化学
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2023
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IF 9.8
Jianqiao Zhang,Zhiyang Li,Qian Lei,Dan Zhong,YiXin Ke,WenJie Liu,Lei Yang
The practical application of bismuth-based photocatalysts in the field of micropollutant photodegradation is limited due to their weak light absorption and rapid charge recombination. Herein, we have developed a novel carbon quantum dots-modified N-BiOCl (CDs-N-BiOCl) photocatalyst to activate persulfate (PS) for the complete elimination of endocrine-disruptor bisphenol A (BPA) under visible light irradiation. The photoelectric properties characterization shows that N atoms could replace Cl atoms or adsorb on Bi atoms to form local N 1s states in the BiOCl lattice, accompanied by the introduction of doping energy levels that shorten the electron migration distance. Meanwhile, the decorated CDs could effectively accept the photoinduced electrons from N-BiOCl conduction band to facilitate the charge separation. Thus, the 7%CDs-N-BiOCl (7CNB) nanocomposite synergistically activated PS realized rapid and effective degradation of BPA within 20 min (degradation efficiency and mineralization reached 100 % and 66.4 % respectively). Moreover, the 7CNB/PS system displayed favorable adaptability, durability, and interference resistance. Furthermore, the biotoxicity experiments demonstrated that the photodegradation intermediates promoted the growth of Escherichia coli which indicates its eco-friendliness for practical application. Finally, the electron transfer mechanism and the formation of reactive oxygen species in the photodegradation process were interpreted. In short, this work will present a promising strategy for bismuth-based photocatalysts to be used for the efficient treatment of real water bodies under visible light irradiation.
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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光催化
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水处理
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产品关联
DOI
PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2017
·
IF 3.101
Chengqun Xu,Feng Long Gu,Honghai Wu
A BiOCl-Mt material assembled from BiOCl and Na-montmorillonite (Na-Mt) was characterized by XRD , FT-IR, TEM, XPS and UV–vis DRS . Na-Mt was clearly demonstrated to be capable of improving BiOCl's photocatalytic performance. The focus was placed on the evaluation of BiOCl-Mt in the terms of photocatalytic activity for cationic Rhodamine B (RhB) and anionic Orange G (OG). Both can be removed more efficiently using BiOCl-Mt compared with pure BiOCl under ultraviolet light irradiation. Although h v b + and O 2 − are the two primary reactive species, the improved photocatalytic degradation performance is primarily attributed to the enhanced separation of photogenerated charge carriers in the catalyst. The Bronsted acidity derived from montmorillonite acid sites and the dissolved oxygen in the solution are capable of promoting dye photocatalysis because they effectively capture the photogenerated electrons. Under optimized conditions, TOC mineralization with rates of 82.3% for RhB and 85.9% for OG was obtained in a BiOCl-Mt catalysed photocatalysis process. The mechanism responsible for the oxidative decomposition of the two different dyes is primarily hole-driven. BiOCl-Mt was stable during the process, with its structures remaining almost unchanged after it was recycled three times. Therefore, BiOCl-Mt will have a promising worldwide application in dye-containing wastewater 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 ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Fangfang Duo,Mingliang Zhang,Xiaoting Feng,Chubei Wang,Liangliang Chu,Xi Chen,Jianwei Zhou
Constructing Z-scheme heterojunction has been regarded as a fascinating method to enhance the charge carrier separation rate and retain the high photoredox ability. In this paper, a novel 0D/2D MoS 2 QDs/BiOCl Z-scheme heterojunction with outstanding visible-light photocatalytic performance has been successfully prepared by a facile one-step strategy. The MoS 2 QDs with a diameter of 5 nm were uniformly distributed on the surface of BiOCl nanosheets . The optimized MoS 2 QDs/BiOCl heterojunction showed the most robust CIP and RhB degradation efficiency, which was approximately 32.2 and 44.7 times higher than that of pure BiOCl under visible light irradiation, respectively. This result can be attributed to the synergetic effects of up-conversion and direct Z-scheme heterojunction of the MoS 2 QDs. The optical property , morphology and surface feature of the catalyst were analyzed through the UV–vis DRS, PL , XRD , Raman, FT-IR, XPS, SEM and TEM. The study of ESR characterization and free radical capture experiments confirmed the Z-scheme heterojunction electron transfer route. Finally, a rational photocatalytic mechanism for pollutants degradation over the MoS 2 QDs/BiOCl heterojunctions were proposed. This study may provide a reliable strategy for the construction of Z-scheme bismuth-based heterojunction and its potential application in photocatalytic organic pollutants degradation.
研究领域:
材料科学
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光催化
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环境科学
·
纳米技术
✓ 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）