JOURNAL OF HAZARDOUS MATERIALS
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2019
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IF 7.65
Linlin Zhang,Jianang Sha,Rongrong Chen,Qi Liu,Jingyuan Liu,Jing Yu,Hongsen Zhang,Cunguo Lin,Jun Wang
Herein, several novel composite films consisting of three-dimensional (3D) Bi 5 O 7 I flower-like shaped microsphere and zwitterionic fluorinated polymer (ZFP) were successfully fabricated with the aim of achieving high anti-fouling performance. The prepared Bi 5 O 7 I flower-like shaped microsphere particles with diameters in the range of 2∼3 μm were uniformly distributed on the surface and in the internal of ZFP. Benefiting from the hydration layer formed by the ZFP and the efficient photocatalytic performance of Bi 5 O 7 I flower-like microsphere, the resultant optimized Bi 5 O 7 I/ZFP composite film exhibited an excellent diatom anti-settling performance and a high antibacterial rate of 99.09% and 99.66% towards Escherichia coli and Staphylococcus aureus . In addition, the composite films possessed the strengthened visible light absorption, the effectively separation and transfer of the photo-induced electrons and holes, the large number of hydroxyl (O H) radicals and superoxide radicals (O 2 − ) all in Bi 5 O 7 I/ZFP systems, all of which were beneficial for the photocatalytic antifouling activity. More importantly, the synergistic hydration-photocatalytic effect of the Bi 5 O 7 I/ZFP composite films are answerable for the improvement of the antifouling property compared to the control. Thus, the synergistic hydration-photocatalytic contribution of Bi 5 O 7 I/ZFP composite film will shows promise for potential application in marine antifouling.
研究领域:
材料科学
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海洋生物学
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环境科学
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
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2019
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IF 4.85
Jiannan Lin,Zheng Hu,Hui Li,Jianqiang Qu,Miao Zhang,Wenjie Liang,Shi Hu
Bismuth oxyhalide (Bi-O-X) is a group of layered semiconductors, which are promising candidates for photocatalysis due to their inherent internal electric field and adjustable band gap through composition and morphology control. Bismuth-rich Bi-O-X has improved stability and advantageous band structure compared to those of Bi-O-X and hence has attracted an increasing amount of research interest. In this work, ultrathin nanotubes of Bi5O7I with a 5 nm diameter and a 1 nm wall are obtained through a hydrothermal method while the phase and morphology of the products are regulated by the pH values and polyvinylpyrrolidone (PVP) concentration of the reaction system, of which the products can be tuned from BiOI nanosheets to Bi5O7I nanobelts and ultrathin Bi5O7I nanotubes. PVP and pH control is important to the formation of the nanotubes as formation occurs via a PVP-guided oriented attachment from primary nanoparticles of Bi5O7I. The poorly crystalline and porous structure of the resultant bismuth-rich ultrathin nanotubes not only exposes more surface atoms but also exhibits a highly reduced conduction band minimum. The resultant band gap of 2.39 eV (as compared to 3.20 eV for the nanobelts) arises from the undercoordinated bismuth centers brought about by the rich oxygen vacancies in the nanotubes. The largely reduced band gap effectively enhances visible-light absorption, while the short charge-diffusion length of the nanotubes further reduces the charge-carrier loss in recombination.
研究领域:
材料科学
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纳米技术
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光催化
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半导体物理
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2017
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IF 6.065
Yannan Chen,Gangqiang Zhu,Mirabbos Hojamberdiev,Jianzhi Gao,Runliang Zhu,Chenghui Wang,Xiumei Wei,Peng Liu
Ag 2 O nanoparticles-loaded Bi 5 O 7 I microspheres forming a three dimensional Ag 2 O/Bi 5 O 7 I p – n heterojunction photocatalyst with wide-spectrum response were synthesized in this study. The results of transmission electron microscopy observations revealed that the Ag 2 O nanoparticles with the diameter of ca. 10–20 nm were distributed on the surfaces of Bi 5 O 7 I nanosheets. The as-synthesized Ag 2 O/Bi 5 O 7 I exhibited an excellent wide-spectrum response to wavelengths ranging from ultraviolet (UV) to near-infrared (NIR), indicating its potential for effective utilization of solar energy. Compared with pure Bi 5 O 7 I, the Ag 2 O/Bi 5 O 7 I composite also demonstrated excellent photocatalytic activity for the degradation of Bisphenol A and phenol in aqueous solution under visible LED light irradiation. Among samples, the 20% Ag 2 O/Bi 5 O 7 I composite photocatalyst showed the highest photocatalytic activity for the degradation of Bisphenol A and phenol in aqueous solution. In addition, the 20% Ag 2 O/Bi 5 O 7 I composite also exhibited a photocatalytic activity for the degradation of Bisphenol A under NIR light irradiation. The improved photocatalytic activity is attributed to the formation of a p - n heterojunction between Ag 2 O and Bi 5 O 7 I, allowing the efficient utilization of solar energy (from UV to NIR) and high separation efficiency of photogenerated electron-hole pairs. The present work is desirable to explore a possible avenue for the full utilization of solar energy.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Peng Gao,Shaojiang Huang,Kang Tao,Zexin Li,Li Feng,Yongze Liu,Liqiu Zhang
Multi-wall carbon nanotubes (MWCNTs) with high electrical conductivity are commonly accounted as the ideal additives to enhance the charge surface migration efficiency in photocatalysis . Theoretically, the MWCNTs-modified binary photocatalysts have potential for the change of nanocrystal structure. Herein, we reports an adjustable {312}/{004}facet heterojunction MWCNTs/Bi 5 O 7 I nanocomposite . Interestingly, the synergistic effect of {312}/{004}facet heterojunction and MWCNTs can effectively accelerate the spatial charge carriers transport. A novel {312}/{004}facet “S-scheme” pathway was proven to be the dominated pathway for the enhancement of spatial charge carriers. As a result, the MWCNTs-{312}/{004}Bi 5 O 7 I composites exhibited superior photocatalytic oxidation efficiency for a representative antibiotics ofloxacin photodegradation . Density functional theory (DFT) calculation and LC-MS/MS analysis confirmed that the possible dealkylation and oxidation pathways could be found in OFL degradation. This work provides novel insights for the relationship between charge carrier transport and facet structure-property.
研究领域:
材料科学
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环境科学
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光催化技术
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Guanlong Yu,Xinyu Liao,Xinkui Wang,Jiani zhang,Anni Zheng,Yuxi Cheng,Songcheng He
A Bi 5 O 7 I/Bi 2 WO 6 nanocomposite with hierarchical spherical structure was successfully prepared by co-precipitation and hydrothermal methods. Notably, the composite (denoted as BB-50) exhibited optimal photocatalytic performance when the Bi 5 O 7 I:Bi 2 WO 6 weight ratio was 50%, with the degradation rate of oxytetracycline (OTC) reaching 98.3% within 90 min and the inhibition rate of Escherichia coli ( E. coli ) bacteria reaching 100% within the same time frame. Characterization experiments and theoretical calculations indicated that the formation of the heterojunction induced an internal electric field at the interface, consistent with the transfer mechanism of photogenerated carriers characteristic of type-I heterojunctions. In addition, the formation of the Bi 5 O 7 I/Bi 2 WO 6 heterojunction promoted the generation of reactive oxygen species (ROS), including ·OH, h + , and e − . The formation of the Bi 5 O 7 I/Bi 2 WO 6 composite not only enhanced the light-absorption capacity (with a red-shift to 433 nm), but also greatly strengthened the adsorption ability, as the specific surface area of BB-50 was higher than those of the Bi 5 O 7 I and Bi 2 WO 6 components, respectively. In particular, the specific surface area of BB-50 was found to be 10.2 and 18.7 times higher than those of Bi 5 O 7 I and Bi 2 WO 6 , respectively. This complex effect also improved the separation and transfer efficiency of photogenerated carriers, which significantly enhanced the photocatalytic activity. The present composite exhibited considerable potential for the efficient removal of OTC and E. coli , providing a feasible approach for reducing water environmental pollution.
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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纳米技术
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水处理
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2018
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IF 4.439
Xueqi Geng,Shuai Chen,Xiang Lv,Wei Jiang,Tianhe Wang
Novel g-C 3 N 4 /Bi 5 O 7 I heterojunction microspheres having excellent photocatalytic activity were successfully prepared by a one-pot ethylene glycol (EG)-assisted hydrothermal method followed by calcination in air. Bi 5 O 7 I microspheres grafted with g-C 3 N 4 nano-sheets were formed and studied by electron microscopy. The morphological effects on g-C 3 N 4 /Bi 5 O 7 I photocatalytic capability with varied g-C 3 N 4 contents were investigated and discussed. The g-C 3 N 4 /Bi 5 O 7 I microspheres exhibited much improved photocatalytic degradation performance under visible light irradiation compared with bare Bi 5 O 7 I and g-C 3 N 4 . The preparation conditions of g-C 3 N 4 /Bi 5 O 7 I microspheres with optimal photocatalytic ability for degrading methyl orange (MO) and rhodamine (RhB) were established. Analyses by both photoluminescence (PL) and photocurrent independently confirmed that photo-induced electron-hole pairs in the g-C 3 N 4 /Bi 5 O 7 I composite have been effectively created which was responsible for the observed photocatalysis. Based on the analysis of the experiment results, a Z-Scheme heterojunction photocatalytic mechanism was proposed. The excellent photocatalytic performance could be attributed to the effective charge separation at the interface between g-C 3 N 4 and Bi 5 O 7 I and the enhanced visible light absorption. In addition, the photocatalytic mechanism was discussed on the basis of the relative band positions of these two semiconductor materials.
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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纳米技术
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2023
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IF 5.4
Menghan Pang,Dongbo Wang,Donghuan Meng,Rongjian Qiu,Chenghua Fan,Yuyan Feng,Juncheng Han
In the present work, the flower spherical Bi 2 WO 6 /Bi 5 O 7 I S-scheme heterojunction was constructed by solution precipitation under room-temperature for photocatalytic degradation of organic pollutants and the working mechanism was investigated. As a special feature, 0.05 BWBOI performed the best photocatalytic capacity under visible light irradiation and was significantly able to degrade 98% of rhodamine B and 92% of bisphenol A in 90 min, whereas ciprofloxacin was degraded to 67% in 120 min. The composite structure was determined by XRD, FT-IR, XPS, and BET characterization, while the electron migration direction and heterojunction scheme were determined by electrochemical and ESR characterization. Eventually, addition of Bi 2 WO 6 not only broadened the light absorption range of the composites, but also achieved the successful construction with Bi 2 WO 6 /Bi 5 O 7 I of S-scheme heterojunctions to accelerate the transport rate of photogenerated carriers. Finally, the current work presents a novel bismuth-based photocatalyst and offers new ideas for the facile preparation of semiconductor heterojunctions.
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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纳米技术
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Qinghan Chen,Li Wang,Dehui He,Bo Xiao,Xia Ran,Rong Li,Hong Xu,Jian Feng
A novel [email protected] 5 O 7 I/Bi(OH) 3 (AB) heterojunction was prepared and the enhanced photocatalytic antibacterial activity against Escherichia coli ( E. coli ) under visible light excitation was exhibited. 3 %AB (containing 3 wt% of Ag) presented best photocatalytic performance, and all of E. coli cells were inactivated within 5 min under natural solar light irradiation. The photocatalytic antibacterial mechanism of AB heterojunction was corroborated by SEM, live/dead cell staining and SDS-PAGE assay. The destruction of the cell membrane, the leakage of the intracellular protein and the decomposition of the protein were considered as the events occurred in the antibacterial process. The radical capture experiment confirmed that •O 2 – and e – played the dominant role in the destruction of the cell membrane and the decomposition of the protein. The improvement of the photocatalytic activity can be mainly ascribe to the construction of heterojunction, SPR effect resulted from Ag deposition, enhanced visible light absorption and more surface oxygen vacancies. These factors are advantageous to the generation of the photogenerated electrons and holes, and improve the spatial separation efficiency of the photogenerated charge. This study presented a promising [email protected] 5 O 7 I/Bi(OH) 3 heterojunction as the photocatalyst for the potential application in the treatment of the bacterial contamination.
研究领域:
材料科学
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环境科学
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纳米技术
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微生物学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Jiahao Lai,Peng Xiao,Yafei Li,Shihai Cui,Jing Yang,Hongzhen Lian
Broadening the light absorption and inhibiting carrier's recombination are vital to the improvement of photocatalytic performance. Herein, self-assembly 3D hierarchical microsphere BiOIO 3 /Bi 5 O 7 I Z-scheme heterojunction with carrier transfer channel was firstly fabricated by in-situ solvothermal method. The degradation efficiency for bisphenol A (BPA) reached 98.9 % within 60 min visible light irradiation. The enhanced photocatalytic activity was benefited from the Z-scheme system assisted by iodate/iodide (IO 3 - /I - ) as carrier transfer channel that not only accelerated the interfacial charge separation, but also provided massive reactive centers for obtaining high redox capacity. The vulnerable sites and the degradation pathways of BPA were identified by density functional theory calculations and liquid chromatography-mass spectrometry analyses. The toxicity of BPA and its intermediates were predicted by ECOlogical Structure Activity Relationship (ECOSAR) and the results demonstrated that BPA was eventually mineralized to harmless products. The Z-scheme charge transfer mechanism was deeply elucidated based on the role of active species (·O 2 - , ·OH and h + ), band structure and carrier separation efficiency. This study provides a promising strategy for the photoactivity enhancement of bismuth based heterojunction in environment purification.
研究领域:
环境科学
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材料科学
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化学
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光催化
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毒理学
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DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2023
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IF 4.3
Salima Ghali,Lamia Mammeri,Hadjira Boucheloukh,Tahar Sehili
A bismuth oxyiodide photocatalytic material was synthesized using a simple solvothermal method, followed by calcination at temperatures ranging from 340 °C to 500 °C. The multiform bismuth oxyiodides obtained via in situ phase transformation using BiOI as precursors were evaluated by the catalytic degradation of paracetamol under simulated sunlight irradiation in an aqueous solution. Several characterization tools were employed to study the phase structures, morphologies, and optical properties of the samples. The results showed that BiOI was completely transformed into Bi 4 O 5 I 2 at 410 °C, which was further decomposed into Bi 5 O 7 I when the temperature was raised to 500 °C. These bismuth oxyiodides exhibited a distinct band structure that allowed for the adjustment of oxidation and reduction abilities of the band energy levels. The highest photocatalytic activity was achieved by Bi 5 O 7 I, which completely degraded paracetamol after 45 min of irradiation. The improvement in catalytic performance activity was attributed to the high ability of holes to oxidize bismuth-rich Bi 5 O 7 I, its specific surface area, and the introduction of I vacancies effectively lowers the recombination of photocarrier and changed the band structure of Bi 5 O 7 I. Moreover, the Bi 5 O 7 I catalyst showed excellent photostability in a five cycle photocatalytic experiment. This study provides a strategy for the development of highly efficient bismuth oxyhalides for the construction of a high performance photocatalyst material for environmental applications.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Huiyun Xia,Zeliang Wu,Wenshuo Zhang,Lifang Song,Xu Li,Liying Cui,Yanhui Niu
In this study, a BiOI/Bi 5 O 7 I photocatalyst is synthesized using a co-precipitation method. The degradation efficiency of NO can reach 70 % under visible light. Subsequently, water-based polyurethane is used as the film-forming matrix, and fluorinated silane is used as low surface energy components, a BiOI/Bi 5 O 7 I water-based polyurethane photocatalytic superhydrophobic coating (FBIU) is prepared by a layer-by-layer spraying technique. The high catalytic activity of BiOI/Bi 5 O 7 I comes from the heterojunction effect of the two semiconductors and the improved interface, which enables the degradation rate of NO to reach 76.9 %, accompanied by extremely low NO 2 conversion rate (<1 %). The wettability, chemical stability and mechanical stability of the FBIU coating are studied to investigate its impact on the long-term oxidative degradation performance of NO. And the self-cleaning characteristics and specific micro-nano structure of FBIU improve the wear resistance of the coating, manifested as a contact angle of 157.8° to water after 320 times of sandpaper polishing. Finally, based on the photocatalytic mechanism of BiOI/Bi 5 O 7 I semiconductor materials, a green long-term purification and degradation mechanism of NO by coatings is proposed. This can provide some insights into the design of air purification coatings for building exterior walls.
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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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yang Wang,Yuzhen Zhang,Huan Li,Yajie Feng,Jiangping Ma,Chaogang Ban,Andrejs Cesnokovs,Xiaoxing Wang,Lujie Ruan,Shaojie Jing,Linyu Cao,Yisen Niu,Yimin Chen,Chonggeng Ma
Contact-electro-catalysis (CEC) offers a promising mechanochemical pathway for harvesting ubiquitous mechanical energy to drive hydrogen evolution. Bismuth oxyhalides are attractive CEC candidates owing to their layered polar structures and strong internal electric fields, yet their performance is limited by weak interactions between surface sites and adsorbates. Here, we combine density functional theory screening with experimental validation to investigate transition-metal-doped Bi 5 O 7 I as vibration-driven hydrogen evolution catalysts. Ten dopants ( M = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn) were systematically evaluated with respect to doping feasibility, water adsorption, and electronic characteristics. Among them, Fe-doped Bi 5 O 7 I was identified as a representative system offering a favorable balance of activity, abundance, and cost. Guided by theoretical insights, Fe/Bi 5 O 7 I nanorods were synthesized and demonstrated a hydrogen evolution rate of 2004.11 μmol·g −1 ·h −1 under ultrasonic stimuli. Mechanistic analyses further revealed that Fe doping enriches the electronic states near the Fermi level, enhances water adsorption, and reduces reaction barriers, while strain introduced by mechanical stimulation provides additional electronic modulation. This work establishes a theory-assisted framework for designing transition-metal-doped Bi 5 O 7 I catalysts and highlights the potential of CEC as a sustainable approach to hydrogen production.
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高影响因子
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