JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 6
·1-14
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IF 2.8
Zhou Xin,Liu Chuang,Zhang Zhi,Chen Piao,Yang Yun,Yang Shuijin
Bi/Bi 4 O 5 Br 2 composite photocatalysts with different loading were prepared by ethylene glycol reduction method. The successful construction of the composite was confirmed by X-ray diffraction, Fourier transform infrared, scanning electron microscope, photoluminescence, UV–Vis diffuse reflection spectroscopy, and X-ray photoelectron spectroscopy. The prepared Bi/Bi 4 O 5 Br 2 composite can degrade the colored dye RhB and the colorless substance BPA under simulated visible light. The catalytic activity of the composite is obviously improved compared with that of the pure substance, and the photocatalytic performance of 5% loading of composite sample is the best. Through the experiments of photoluminescence spectrum and fluorescence decay curve, it is confirmed that the photo-generated carrier separation efficiency of 5% loading of composite sample is the highest. Radical trapping experiments show that h + plays a major role. The improvement of photocatalytic activity of the composite is attributed to the plasmon resonance effect of Bi, which promotes the transfer and separation of semiconductor interface charge. The composite material has good cycle stability, which provides a research idea for the photocatalytic treatment of wastewater.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xiaoli Jin,Jian Cao,Huiqing Wang,Chade Lv,Haiquan Xie,Fengyun Su,Xin Li,Ruixue Sun,Shukui Shi,Mengfei Dang,Liqun Ye
Architecting Z-scheme heterojunction can restrain the recombination of photoinduced carriers to improve the photocatalytic performance. However, it still lacks high-efficiency catalysts for sustainable photoreduction of CO 2 . Herein, an Ag-bridged Z-scheme Bi 4 O 5 Br 2 /AgBr heterostructure is successfully developed, which enables room-temperature CO 2 reduction driven by solar energy. In this catalyst, the Ag mediator acts as a bridge to shuttle electrons between Bi 4 O 5 Br 2 and AgBr, separating the electron-hole pairs efficiently and maintaining the original strong reduction reaction. As a result, Z-scheme Bi 4 O 5 Br 2 /AgBr heterostructures show obviously promoted performance of photocatalytic CO 2 reduction in contrast with pristine Bi 4 O 5 Br 2 , delivering a high CO 2 conversion activity of 6.6 and 1.8 μmol g -1 h −1 for CO and CH 4 products, respectively. This study reports an effective reference of Z-scheme Bi 4 O 5 Br 2 /AgBr heterojunction for satisfactory photocatalytic solar energy conversion and synthesis of high value-added products from CO 2 .
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Dandan Liu,Jinghao Hua,Weijie Zhang,Kai Wei,Shushan Song,Qianyu Wang,Ziheng Song,Huarui Han,Changchang Ma,Sheng Feng
Building efficient catalysts is an urgent issue in the field of photocatalytic CO 2 reduction, and Z-scheme heterojunction structures can availably suppress the recombination of photo generated carriers and improve photocatalytic performance. This study successfully prepared a new type of Bi 4 O 5 Br 2 /Bi-MOF composite photocatalyst through self-assembly method. After 5 h of simulated sunlight exposure, the optimized sample 50-Bi 4 O 5 Br 2 /Bi-MOF photocatalytic reduction of CO 2 to CO efficiency (23.78 μmol·g −1 ·h −1 ) was 5.09 times higher than pure Bi 4 O 5 Br 2 , and the CH 4 yield (5.39 μmol·g −1 ·h −1 ) was 2.52 times that of pure Bi-MOF. In addition, in the cyclic experiment, the catalyst had high stability and reusability. The Z-scheme charge transfer mechanism was confirmed through band structure analysis, Electron spin resonance (ESR), Ultraviolet photoelectron spectroscopy (UPS) and other related characterizations. This work provided an important strategy for designing efficient Z-scheme heterojunction photocatalysts.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
·
IF 3.5
Zheng Nan,Gou Jialin,Lan Meng,Dong Xiaoli,Liu Yujun,Du Jinpeng
Photocatalytic technology has received widespread attention as an effective means of treating organic pollutants in wastewater, but the development of effective and sustainable photocatalysts remains a serious challenge. In this study, a novel Mn 0.2 Cd 0.8 S (MCS)/Bi 4 O 5 Br 2 (BOB) heterojunction photocatalyst was successfully prepared by a two-step solvothermal method. The photocatalytic activity of the MCS/BOB heterojunction photocatalyst for degrading Rhodamine B (RhB) is significantly enhanced relative to Mn 0.2 Cd 0.8 S and Bi 4 O 5 Br 2 . When the molar content of Mn 0.2 Cd 0.8 S was 15% of Bi 4 O 5 Br 2 , the prepared 15% MCS/BOB had the best photocatalytic performance toward RhB with the degradation rate of 91.7% under 60 min of visible light irradiation. The apparent rate constant of 15% MCS/BOB is 10 and 7 times higher than that of Mn 0.2 Cd 0.8 S and Bi 4 O 5 Br 2 , respectively. The excellent photocatalytic performance is associated with the increased specific surface area, extended light absorption range, and proper construction of Z-scheme heterojunction that facilitate effective charge separation and excellent redox capacity. In addition, the heterojunction photocatalyst shows remarkable photocatalytic stability. This study constructs a novel and effective Z-scheme heterojunction photocatalyst and promotes the exploration of photocatalyst in the purification of organic 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
JOURNAL OF SOLID STATE CHEMISTRY
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2020
·
IF 2.726
Qing Xi,Xiuping Yue,Junqiang Feng,Jianxin Liu,Xiaochao Zhang,Changming Zhang,Yawen Wang,Yunfang Wang,Zhiping Lv,Rui Li,Caimei Fan
Photocatalytic hydrogen evolution via water splitting was considered as a promising way of solar energy conversion and storage in the past decades. However, the weak visible-light response and fast recombination of electron-hole pairs are still main obstacles to overcome. Herein, a novel 2D/2D Bi 4 O 5 Br 2 /TL-Ti 3 C 2 (Thin layer-Ti 3 C 2 ) visible-light photocatalyst was successfully prepared by in-situ synthesis of Bi 4 O 5 Br 2 nanosheets on the surface of TL-Ti 3 C 2 at room temperature . The resulting Bi 4 O 5 Br 2 /TL-Ti 3 C 2 exhibits a higher hydrogen evolution activity (83.5 μmol·g −1 ·h −1 ) than that of pristine Bi 4 O 5 Br 2 (44.9 μmol·g −1 ·h −1 ) under visible-light irradiation. The enhanced hydrogen evolution activity of as-prepared photocatalyst mainly attributes to the increased visible light responsiveness and rapid transfer of photo-induced electrons. The strong interaction between TL-Ti 3 C 2 and Bi 3+ in Bi 4 O 5 Br 2 nanosheets establishes a good electron transfer channel and close contact, which accelerates the transfer of photo-induced electrons from Bi 4 O 5 Br 2 to Ti 3 C 2 and promotes the separation of photo-generated charge carriers, thereby increasing the number of effective photo-induced electrons involved in the hydrogen evolution. This work provides a new insight into the construction of Bi x O y Br z /MXene photocatalyst system, and demonstrated that Ti 3 C 2 has excellent application potential in promoting the photocatalytic performance of bismuth-rich bismuth oxyhalides (Bi x O y X z X = Cl, Br, I).
研究领域:
材料科学
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能源化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
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IF 7.4
Kang Deng,Xintong You,Minyi Liu,Yongyi Tan,Yilian Lin,Wei Shu,Feiyan Liu,Shunheng Tu,Yi Yang
Herein, we developed a self-assembly heterostructured BiOI/Bi 4 O 5 Br 2 microcluster with the hydrothermal method . Catalysts were mainly characterized by powder X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscope , energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy and diffuse reflectance spectra. The results showed that due to charge induction, BiOI nanosheets were successfully self-assembled and deposited on Bi 4 O 5 Br 2 , forming a unique heterojunction and achieving strong transient photocurrent response. Performances of catalysts were tested and effects of different initial concentrations of the Methylparaben (MPB), catalyst dosage, initial pH and total organic carbon (TOC) conversion were studied. Results reveal that catalytic activity increased with lower initial concentration of MPB and the best dosage of catalyst is 0.5 g·L -1 . The BiOI/Bi 4 O 5 Br 2 microcluster exhibits excellent photocatalytic activity under visible-light irradiation, which can degrade 97% MPB in 2 h and the TOC value is only 20% of the original. The catalytic degradation process conforms to pseudo-first-order kinetics with a rate constant of 0.030 min -1 . The results of detailed active species detection indicate that the photogenerated holes and •O 2 − radicals play the main role in the photocatalytic system. In addition, photoelectrochemical measurements reveal that the excellent strengthened photocatalytic activity is due to the high separation and transfer efficiency derived from the heterostructure.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Weijie Yang,Kailong Sun,Jun Wan,Yang-Ai Ma,Jiaqing Liu,Bicheng Zhu,Lin Liu,Feng Fu
The insufficient generation of oxidative active species severely limits the activity of photocatalytic aerobic oxidation for organic pollutants degradation in wastewater. Herein, transition metal phosphides (TMPs) cocatalysts, including Ni 2 P, Co 2 P, and NiCoP, were loaded on Bi 4 O 5 Br 2 nanosheets by a simple liquid assembly method. Among which, 15% NiCoP/Bi 4 O 5 Br 2 heterojunction exhibits the optimal photocatalytic activity for degrading phenolic pollutants owing to the high concentration of h + and •O 2 − active species, and it displays excellent tolerance for the inorganic ions, pH value, water matrix, and outdoor sunlight. The S-scheme charge transfer mechanism was revealed for NiCoP/Bi 4 O 5 Br 2 heterojunction, which significantly improves the separation efficiency of photogenerated charge carriers and facilitates the accumulation of active h + . Furthermore, NiCoP with high reduction potential and outstanding O 2 activation ability is served as the active site for producing •O 2 − . This work can inspire the further design of bifunctional photocatalysts for efficient photocatalytic aerobic oxidation applications.
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
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Zhixiong Yang,Bo Hu,Xiaotian Wang,Dmitry Selishchev,Gaoke Zhang
The development of high-performance photocatalysts is crucial for enabling efficient CO2 conversion in photocatalytic systems. Here, we developed a novel heterojunction (N-BON) composed of Ni-doped Bi4O5Br2 and NiCo2O4 for CO2 photoreduction with the help of simulated sunlight. The optimized 21N-BON composite exhibited the highest activity, producing 18.66 μmol·g–1·h–1 of CO with a selectivity of 95.7%, which represents a remarkable 2.15-fold and 4.75-fold increase in CO yield compared to the Bi4O5Br2/NiCo2O4 heterojunction and Ni-doped Bi4O5Br2, respectively. Photoelectrochemical testing, photoluminescence analysis, and theoretical calculations demonstrated that the enhanced performance of the 21N-BON composite is attributed to improved photogenerated carrier separation, driven by the synergistic effects of Ni-doping-induced spin polarization and the built-in electric field from heterojunction construction. Additionally, theoretical calculations and in situ DRIFTS analyses was used to clarify the CO2 reaction mechanisms on the photocatalyst surface, showing that Ni doping improved CO2 adsorption and promoted the formation of key reaction intermediates. This study offers important guidance for developing advanced photocatalysts for solar-driven CO2 reduction, contributing to sustainable energy solutions.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Wang Cao,Caiyun Jiang,Chen Chen,HaiFei Zhou,Yuping Wang
The novel Z-scheme CdS/Bi 4 O 5 Br 2 heterostructure was successfully synthesized by a simple mixed-solvent thermal method. It proved that the Z-scheme CdS/Bi 4 O 5 Br 2 heterojunction was constructed by XRD , SEM, TEM and XPS. The synthesis of CdS nanospheres on ultra-thin Bi 4 O 5 Br 2 nanosheets to form a heterojunction interface was beneficial to the dispersion and transfer of the photogenerated electron–hole pairs, which was demonstrated by PL , i-t and EIS. UV-Vis diffuse reflectance spectra attested CdS/Bi 4 O 5 Br 2 heterojunction enhanced utilization of visible light. The Z-scheme 0.5-CdS/Bi 4 O 5 Br 2 heterojunction exhibited the highest photocatalytic performance for degradation process of CIP and TC than that of pure CdS and Bi 4 O 5 Br 2 . In addition, recycling tests declared that the Z-scheme 0.5-CdS/Bi 4 O 5 Br 2 heterojunction compared with single CdS had higher stability and durability, attributing to effectively alleviating photocorrosion of CdS. It could be seen from the trapping agent experiment that superoxide free radicals and hydroxyl free radicals were the main active substances. The possible photocatalytic mechanism of the Z-scheme 0.5-CdS/Bi 4 O 5 Br 2 heterojunction under visible light irradiation was proposed.
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
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Xuesong Zhao,Yingying You,Shaobin Huang,Yixiao Wu,Yiyang Ma,Guan Zhang,Zhenghua Zhang
Photocatalytic production of hydrogen peroxide from water and oxygen is a promising technique due to the green and sustainable solar-to-chemical energy conversion. However, in the absence of organic sacrificial agents as electron donors, the relatively low photocatalytic H 2 O 2 productivity is still far from satisfactory. Herein, we present a Z‐scheme photocatalytic production of hydrogen peroxide over Bi 4 O 5 Br 2 /g-C 3 N 4 heterostructure under visible light without additive organics. The obtained Bi 4 O 5 Br 2 /g-C 3 N 4 heterostructure exhibited a highest H 2 O 2 production of 124 μM in 60 min by a Z-scheme photocatalytic mechanism. The photoinduced electrons of Bi 4 O 5 Br 2 combine with the holes of g-C 3 N 4 at the contact interface, and the e − and h + of the heterostructure are mainly derived from the conduction band of g-C 3 N 4 and valence band of Bi 4 O 5 Br 2 , respectively. As such, more e − and h + of Bi 4 O 5 Br 2 /g-C 3 N 4 heterostructure are available to reduce oxygen and oxidize water, respectively, with more ·O 2 − and ·OH generated and thus more H 2 O 2 produced.
研究领域:
材料科学
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环境科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2025
·
IF 3.9
Jingwen Meng,Xiaoli Jin,Mengyuan Zhao,Zhuohua Chen,Weixi Hao,Shilong Lin,Xin Li,Fengyun Su,Fei Li,Kaiting Yang,Xiongtao Lv,Xuhan Zhang,Haiquan Xie
Limited light absorption and low carrier separation efficiency remain major obstacles to converting CO 2 into solar fuel. Rational design of semiconductor photocatalysts with unique structures holds promise for overcoming these challenges. In this study, Bi 4 O 5 Br 2 photocatalyst with a hollow core-shell architecture is synthesized via a one-step solvothermal method. This innovative structure facilitates efficient reflection and absorption of incident light within its internal cavity, while also minimizing the charge transfer path. Consequently, it significantly improves both light harvesting capabilities and charge carrier separation efficiency. Compared to the solid Bi 4 O 5 Br 2 (CO, 0.21 μmol g −1 h −1 ; CH 4 , 0.78 μmol g −1 h −1 ) and hollow Bi 4 O 5 Br 2 (CO, 0.25 μmol g −1 h −1 ; CH 4 , 0.99 μmol g −1 h −1 ) counterparts, the hollow core-shell Bi 4 O 5 Br 2 exhibits superior CO 2 photoreduction performance, achieving production rates of 3.61 and 2.40 μmol g −1 h −1 for CO and CH 4 , respectively. Notably, it also enhances C 2 H 4 production during the CO 2 reduction process, with a yield of 0.17 μmol g −1 h −1 , whereas no detectable C 2 H 4 is produced by either the solid or hollow Bi 4 O 5 Br 2 structures. This research provides fresh insights into the structural design of advanced photocatalysts and holds significant implications for converting CO 2 into high-value chemicals.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2024
·
IF 3.8
Kaiting Yang,Xiongtao Lv,Jingwen Meng,Huiqing Wang,Lin Guo,Xin Li,Fengyun Su,Qing Lan,Zhengdao Li,Wei Wang,Yuwei Guo,Xiaoli Jin,Haiquan Xie
Photothermal catalytic reduction of CO 2 into high value-added C 2 hydrocarbon products is a promising method for efficient CO 2 conversion. However, current photocatalysts still encounter obstacles including limited photoabsorption range, rapid recombination of photogenerated carriers , and inadequate surface active sites. Herein, Bi 4 O 5 Br 2 co-modified with oxygen vacancy (OV) and metal bismuth (Bi) (Bi 4 O 5 Br 2 -OV@Bi) has been prepared to optimize these crucial issues. Bi 4 O 5 Br 2 -OV@Bi delivers a remarkably improvement in CO 2 photothermal conversion, reflecting by the notable increase in C 1 (CO and CH 4 ) and newly generated C 2 (C 2 H 4 and C 2 H 6 ) products compared to pristine Bi 4 O 5 Br 2 . In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) spectrometry reveals that OC−COH* intermediate promotes the C–C coupling for produce C 2 hydrocarbons. This study strengthens the understanding of metal modification and defect engineering for forming C 2 hydrocarbons on bismuth-based photocatalysts .
研究领域:
材料科学
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环境科学
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催化化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）