ACS Applied Nano Materials
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2024
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IF 5.3
Yao Liu,Luotian Lv,Han Feng,Hao Liu,Yongqing Wang
Developing highly efficient photocatalysts for CO2 reduction is critical for addressing global warming and energy supply issues. However, both single-component metal-organic frameworks (MOFs) and conventional semiconductor catalysts face significant challenges, such as severe charge recombination, poor CO2 adsorption capacity, and low utilization of solar energy in the photocatalytic reduction of CO2. To address these limitations, the formation of Z-scheme heterojunction photocatalyst has been proved to be an effective way to suppress the recombination of photoinduced carriers. In this work, an indirect Z-scheme heterojunction photocatalytic system, namely, Cu-doped-ZIF-67Co/Bi4O5Br2, is prepared by means of ion-doping and in situ growth strategy. Electrochemical characterization demonstrated the formation of p-type ZIF-67CoCu nanocubes and n-type Bi4O5Br2 nanosheets. The indirect Z-scheme band structure of the heterojunction was well-defined by X-ray photoelectron spectroscopy (XPS), Mott–Schottky test, and ultraviolet photoelectron spectroscopy (UV). The optimal Cu-doping ratio (molar ratio) and composite ratio (mass ratio): 1% ZIF-67CoCu(1:1)/Bi4O5Br2 exhibits excellent photocatalytic CO2 reduction performance, a remarkable rate of 6469.88 μmol·g–1·h–1, and a high CO selectivity of 97%. Compared to individual ZIF-67CoCu and Bi4O5Br2, the performance of reduction of CO2 to CO is improved by 4.19 and 8.64 times, respectively. Density functional theory calculations and in situ diffuse reflectance infrared Fourier transform spectroscopy results had shown that the existence of Cu in ZIF-67 facilitates the desorption of CO and the reduction process features the key CO* intermediate during the photoreduction of CO2 to CO on 1% ZIF-67CoCu/Bi4O5Br2. This study provides an exciting example for the design and understanding of the ion-doped MOFs and the semiconductor construction of indirect Z-scheme photocatalytic system for promoting photocatalytic capacity.
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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光催化
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纳米技术
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Tingting Yu,Qingsong Liu,Guang Chen,Lifen Liu,Jinlong Zhang,Changfei Gao,Tao Yang
A novel heterostructure of g-C 3 N 4 /ZnO/Bi 4 O 5 Br 2 (ZB-3) was designed, and used in the microbial coupled photocatalytic fuel cell (MPFC). It can effectively improve electron utilization efficiency and pollutant degradation using this double Z-scheme heterojunction structure . The current–time ( I – t ) curves demonstrated that the current density of ZB-3 was higher than that of ZnO, ZnO/Bi 4 O 5 Br 2 (ZB-1), g-C 3 N 4 /ZnO (ZB-2). Electrochemical impedance spectroscopy (EIS) indicated ZB-3 possessed the minimum charge-transfer resistance. This MPFC for degrading rhodamine B (RhB) and tetracycline (TC) under different conditions were developed using these materials. Even in the dark condition, MPFC with g-C 3 N 4 /ZnO/Bi 4 O 5 Br 2 demonstrated 93% and 82% degradation efficiency for RhB and TC, respectively. Furthermore, the electron transport mechanism of the MPFC and ZB-3 were proposed. It paves the approach for more efficient pollutant degradation via MFC photocatalysis .
研究领域:
环境科学
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能源材料
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电化学
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光催化
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水处理技术
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Nano Energy
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2019
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IF 15.548
Xiaoli Jin,Chade Lv,Xin Zhou,Haiquan Xie,Shanfu Sun,Yue Liu,Qingqiang Meng,Gang Chen
The insufficient separation of photogenerated charge carriers and faint CO 2 capture remains the major obstacles for photocatalytic conversion of CO 2 into solar fuel. Rational design of semiconductor photocatalysts with unique structures may be promising to break this bottleneck. Herein, bismuth rich Bi 4 O 5 B 2 hollow microspheres are designed as a robust photocatalyst for efficient CO 2 reduction. Thanks to the bismuth rich strategy, the highly dispersed band structure and the elevated conduction band (CB) potential facilitate the charge transfer and photoreduction ability. Meanwhile, hollow structure provides the large specific area and creates a resonance in its interior to enhance the CO 2 adsorption and activation. Benefiting from the collaborative promotion effect, the local charge arrangement and electronic structure are tuned so as to an exceptional efficiency of photocatalytic CO 2 conversion into CO (3.16 μmol g −1 h −1 ) and CH 4 (0.5 μmol g −1 h −1 ) is attained over hollow Bi 4 O 5 Br 2 , which is superior to that of solid Bi 4 O 5 Br 2 and BiOBr, as well as other reported Bi-based photocatalysts. This work paves new opportunities for exploring high-efficiency CO 2 photoreduction catalysts.
研究领域:
材料科学
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环境科学
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LANGMUIR
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2025
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IF 3.9
Qintian Peng,Na Wen,Xinqiang Cao,Dianjia Zhao
Using bismuth oxyhalides (BiOX) for the peroxymonosulfate (PMS)-assisted visible-light photocatalytic degradation of organic pollutants is a promising and environmentally friendly approach. However, pristine BiOBr suffers from limited visible-light absorption and low charge carrier mobility. In this study, Bi4O5Br2 microspheres were successfully synthesized and employed as a photocatalyst to activate PMS under visible light for the degradation of the herbicide atrazine (ATZ). Experimental results demonstrated that Bi4O5Br2 displayed markedly enhanced photocatalytic activation performance relative to pristine BiOBr, exhibiting a 9.15-fold increase in the apparent reaction rate constant for ATZ degradation. In addition, radical quenching experiments confirmed that singlet oxygen (1O2) and sulfate radicals (•SO4–) served as the primary reactive species. Furthermore, assessment using the Toxicity Estimation Software Tool (T.E.S.T) confirmed a significant reduction in the ecological toxicity of the degraded ATZ solution. This work not only presents an efficient photocatalytic-PMS synergistic degradation system but also offers a promising solution for the efficient removal of recalcitrant organic pollutants.
研究领域:
环境科学
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光催化
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高级氧化技术
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材料化学
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水处理
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PubMed
高影响因子
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
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2026
·Vol. 103
·期 6
·102668
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IF 3.4
Ailin Luo,Shipeng Ye,Yingge Zhao,Qing Wang,Yu Song,Limei Zhou,Yafen Zhou
A variety of Bi 4 O 5 Br 2 photocatalysts were synthesized by different methods. • The microsphere-like Bi 4 O 5 Br 2 showed the best light absorption and charge transfer. • A remarkable enhanced activity for the photocatalytic oxidation of benzylamine. • The microsphere-like Bi 4 O 5 Br 2 manifested its excellent stability and versatility. A variety of bismuth-rich Bi 4 O 5 Br 2 (BOB) photocatalysts were synthesized by different methods. The impacts of synthesis approaches on the morphology, structure, composition, textural and optical-electronic properties of the as-fabricated Bi 4 O 5 Br 2 samples were systematically surveyed using various characterization techniques. The photocatalytic performance of the resulting Bi 4 O 5 Br 2 samples toward the oxidative coupling of benzylamine under simulated solar light illumination and air atmosphere was evaluated. It was found that the microsphere-like Bi 4 O 5 Br 2 (BOB-MS) showed the best photocatalytic property, with nearly complete conversion of benzylamine (BA) and 99.1% selectivity to N-benzylidene benzylamine (N-BDBA) after 2.5 h of light exposure. Besides, BOB-MS maintained high activity and excellent N-BDBA selectivity (>99.0%) during five consecutive cycles, demonstrating its brilliant stability and recyclability. In addition, for some benzylamine derivatives and heterocyclic amines, BOB-MS can also photocatalyze their transformation to the corresponding imines, manifesting the universal applicability of the catalyst. The results not only confirm the important influence of morphological modulation on the photocatalytic performance but also provide novel insights for the design of efficient and stable bismuth oxyhalide photocatalysts. Download: Download high-res image (362KB) Download: Download full-size image
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INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Ying Shao,Mingtao Chen,Zhu Chen,Tongxin Liu,Gengyang Chen,Jiao He,Liang Jiang,Yongjuan Chen,Jiaqiang Wang
The photocatalytic oxidative coupling of amines is an economically efficient and environmentally friendly method for imine synthesis. However, the application of traditional photocatalytic materials is limited by their low visible-light utilization efficiency, poor stability, and harsh reaction conditions. Herein, Bi 4 O 5 Br 2 nanoflowers were prepared using N , N -dimethylformamide as the solvent without the use of surfactants. Waste biomass derived from cyanobacterial blooms was then subjected to hydrothermal treatment to obtain hydrothermal carbonization carbon (Cya-HTCC) and used for the modification of Bi 4 O 5 Br 2 . The resulting composite photocatalyst exhibits excellent photocatalytic oxidative coupling performance for amines. Results of characterization shows that there is a significant interaction between Cya-HTCC and Bi 4 O 5 Br 2 , forming a heterostructure, which improves the separation efficiency of photogenerated carriers. Experimental results indicate that under the optimal ratio, Bi 4 O 5 Br 2 /HTCC(5) achieves a conversion rate of 97.52 % for benzylamine within 4 h under visible-light irradiation using oxygen in the air as the oxidant, with the selectivity of the main product N-benzylidenebenzylamine reaching 97.94 %. The conversion rate is 2.1 times and 1.5 times those of bare Bi 4 O 5 Br 2 and Cya-HTCC, respectively. This work provides a new idea for the economical, sustainable, and green conversion of benzylamine.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2026
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IF 5.2
Wenzhi Zhou,Mingkun Wu,Yuelong Liang,Zhenghai Yang,Jindong Yang,Mengkui Tian
Constructing heterojunctions is an effective strategy to enhance charge carrier separation and photocatalytic performance. In this study, a Bi 4 O 5 Br 2 /InVO 4 S-scheme heterojunction composite was prepared by a solvothermal method. The physicochemical properties were thoroughly investigated using various characterization techniques. Visible-light degradation experiments of ciprofloxacin (CIP) showed that the optimal sample, 5% Bi 4 O 5 Br 2 /InVO 4 (BI-5), exhibited the highest degradation activity (92.77%) along with excellent cycling stability. The effects of different environmental factors on the degradation performance were also systematically studied. The enhanced activity is attributed to the synergistic effect of the S-scheme heterojunction and increased oxygen vacancies. The S-scheme charge transfer, driven by the IEF at the heterointerface, enables spatial separation of photogenerated electrons and holes while preserving strong redox potentials, with reductive electrons accumulating in Bi 4 O 5 Br 2 and oxidative holes remaining in InVO 4 . Meanwhile, the introduction of InVO 4 creates abundant oxygen vacancies. These vacancies act as electron capture centers to suppress bulk recombination, introduce in-gap states that facilitate interfacial charge transfer, and provide additional active sites for surface reactions. Consequently, the S-scheme junction and oxygen vacancies jointly promote the separation, migration, and surface utilization of charge carriers, leading to significantly improved photocatalytic performance.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Jinmiao Sun,Xiaoli Li,Jiamin Li,Manman Mu,Xiaohong Yin
Bi-based semiconductors have been regarded to be an ideal platform in photocatalytic CO 2 reduction to fuels. However, the insufficient charge transfer efficiency greatly restricts their practical application. Herein, we fabricated 1D/2D hierarchical heterostructures by the hybridization of Bi 4 O 5 Br 2 and rod-like MOF-derived MoS 2 anchored in nitrogen-doped porous carbon (NPC-MoS 2 ) using Mo-MOF as a precursor followed by sulfidation and typical solvothermal process. Compared to pristine Bi 4 O 5 Br 2 nanosheet and NPC-MoS 2 nanorod , the 5 wt% NPC-MoS 2 @Bi 4 O 5 Br 2 p-n heterojunction exhibits distinctly enhanced photocatalytic activity under light illumination due to the increased light absorption capability and more effective charge transfer efficiency. X-ray photoelectron spectroscopy and photoelectrochemical analysis imply that a built-in electric field on interfaces is created to form p-n heterojunctions which drive the photoinduced electrons transferred from NPC-MoS 2 to Bi 4 O 5 Br 2 . Finally, the type-II charge transfer mechanism is proposed which promotes separation of the charges and provides suitable conduction band to reduce CO 2 much efficiently. In a word, this work provides a new insight into the establishment of hierarchical p-n heterostructures for photocatalysis .
研究领域:
材料科学
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环境科学
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ChemCatChem
·
2019
·Vol. 11
·期 15
·3490-3504
·
IF 4.495
Shanshan Ding,Mengshu Han,Yuxuan Dai,Shaogui Yang,Danjun Mao,Huan He,Cheng Sun
Graphical Next level silver : The novel plasmonic heterojunction photocatalysts of Ag/AgBr/Bi 4 O 5 Br 2 layered microspheres (AAB-LMs) were successfully synthesized by the in-situ deposition and visible-light photoreduction approach. They performed elevated photocatalytic activities towards the degradation of acid orange II and aniline under visible-light irradiation than Bi-O-Br and Ag/AgBr, which was mainly credited to the surface plasmon resonance (SPR) effect of Ag nanoparticles and the synthetic interaction among Ag, AgBr and Bi 4 O 5 Br 2 The novel photocatalysts of Ag/AgBr/Bi 4 O 5 Br 2 layered microspheres (AAB-LMs) were firstly constructed via the in-situ deposition and visible-light photoreduction approach. Their compositions, structures, morphologies and optical properties were characterized by various techniques. The photocatalytic efficiencies of AAB-LMs-10 were 28 and 3.4 times higher than those of Bi 4 O 5 Br 2 -LMs towards degrading acid orange II and aniline, respectively. The superior photocatalytic behavior of AAB-LMs benefited from efficient separation and transfer of photo-generated charges, which was mainly credited to the surface plasmon resonance effect of Ag nanoparticles and the synthetic interaction among Ag, AgBr and Bi 4 O 5 Br 2 . O 2 − and h + were characterized as the predominant photoactive species in this AAB-LMs-photocatalysis system. Moreover, due to the presence of radical species Br 0 , which was verified by the detection of bromoaniline and dibromoaniline during the photocatalytic degradation process of aniline, Z-scheme mechanism rather than the conventional heterojunction mode was more suitable to explain the enhanced photocatalytic performance of AAB-LMs.
研究领域:
材料科学
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环境科学
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Bin Wang,Hailong Chen,Fangcheng Huang,Jinyuan Liu,Gaopeng Liu,Yu-Xiang Weng,Yuanbin She,Xingwang Zhu,Huaming Li,Jiexiang Xia,Paul K. Chu
In order to enhance the efficiency of artificial photosynthesis, it is imperative to improve the hysteretic migration and separation efficiency of photogenerated charge carriers. Herein, ultrathin Bi 4 O 5 Br 2 (BOB) nanosheets are prepared vertically and uniformly on the surface of hollow N-doped carbon spheres (NC) to produce a hollow confined nanoreactor (BOB@NC). The graphite layer and N in NC act as a tandem electron pump for the rapid transfer of photogenerated electrons from BOB to the NC surface via the Bi-C bridging bond between BOB and NC, and the electrons on the NC surface continue to move to the N-induced defect energy levels. This NC electron pump facilitates the transfer of the photogenerated electrons in a directional, rapid, and efficient manner. Meanwhile, the adsorption of CO 2 molecules and hydrogenation of *CO to *CHO at the N site on NC are kinetically spontaneous, thereby significantly reducing the CO 2 reduction reaction energy barrier of BOB. As a result, the efficiency of CO 2 hydrogenation reduction to CO and CH 4 by BOB@NC is 3.31 and 11.15 times higher than that by the BOB monomer, respectively. The hollow confined electron pump reactor reveals a novel strategy for the design and fabrication of catalysts for high-performance artificial photosynthesis.
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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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2026
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IF 3.3
Zhou Xueqin,Zhang Fengjun
Given the increasing interest in converting CO 2 into clean energy through photocatalytic processes, a Bi 4 O 5 Br 2 /Bi 2 WO 6 heterojunction photocatalyst was successfully constructed via a hydrothermal process combined with an in situ growth technique for efficient CO 2 photoreduction. Without sacrificial agents, the composite material 20Bi 4 O 5 Br 2 /Bi 2 WO 6 (20BOB/BWO) demonstrated superior photocatalytic activity. The generation rates of CO and CH 4 reached 25 µmol·g −1 ·h −1 and 4.6 µmol·g −1 ·h −1 , respectively; notably, the CO yield was significantly higher than that of pure Bi 4 O 5 Br 2 and Bi 2 WO 6 . Such enhancement originated from the type-II interfacial charge transfer mechanism, which facilitated efficient spatial charge separation and consequently led to a remarkable improvement in the composite’s catalytic efficiency.
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CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Xiaoyi Dong,Zhaoyi Yin,Liang Xu,Junhao Ma,Haomiao Cao,Yongjin Li,Qi Wang,Jin Han,Jianbei Qiu,Zhengwen Yang,Zhiguo Song
To achieve efficient degradation of organic pollutants, two critical objectives are enhancing photogenerated carrier separation and expanding the spectral response range. In this study, we synthesized atom-sharing Bi/Bi 4 O 5 Br 2 :Yb 3+ ,Tm 3+ (Bi/BYT) heterojunctions with surface plasmon resonance (SPR) effects and upconversion (UC) by employing self-sacrificial Bi 4 O 5 Br 2 :Yb 3+ ,Tm 3+ (BYT) fractions as a source of metallic Bi. Results revealed that the optimal Bi/BYT-2 catalyst exhibited the highest BPA degradation efficiency within 120 min, representing a significant 1.3-fold improvement over BYT alone. This outstanding catalytic performance can be attributed to the synergistic interplay between UC fluorescence, the unique SPR effect of Bi metal, and the atom-sharing heterojunction. These factors effectively broaden the spectral absorption range and significantly enhance the separation and utilization efficiency of photoinduced carriers. This study lays the groundwork for the development and design of novel atomic-level contact heterojunctions, offering insights into enhancing photocatalytic efficiency through plasmon resonance and UC fluorescence on non-precious metal surfaces.
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