JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Chongshang Guan,Tian Hou,Wuyang Nie,Qian Zhang,Libing Duan,Xiaoru Zhao
In this work, different BiOBr powders (without and with Zn doping) were prepared. Their specific properties and photocatalytic performance were studied. Zn doped BiOBr showed higher carrier transportation ability, beneficial to high performance photocatalysis . Further analysis and theoretical calculations unveiled that Zn doping resulted in more dispersive energy band structure with improved oxygen vacancy (O V ) generation due to lattice distortion. O V acted as trap centers, playing dominant role in carrier transportation enhancement, which also synergized with more dispersive energy band due to Zn doping, improving carrier separation and transfer. Besides, Zn doping would further strengthen trapping effect under O V existence, stimulating synergistic enhancement to spatial charge separation and transfer with O V . With synergy of Zn doping and O V , Zn doped samples produced 1.75 times higher CH 4 generation during gas–solid photocatalytic reduction of CO 2 under visible light , testifying successful conducting of Zn doping improved photocatalytic capacity on BiOBr.
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 ALLOYS AND COMPOUNDS
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2016
·
IF 3.014
Weibing Li,Yaping Zhang,Yuyu Bu,Zhuoyuan Chen
In this work, the BiVO 4 /BiOBr heterojunction composite was successfully prepared by a simple one-pot hydrothermal process. The formation of BiVO 4 and BiOBr and the photocatalytic performance of the prepared BiVO 4 /BiOBr composite were significantly influenced by the addition of cetyltrimethyl ammonium bromide (CTAB) and the concentration of HNO 3 used during the process of preparing BiVO 4 . Rhodamine B (RhB) can be completely degraded in 15 min by the BiVO 4 /BiOBr composite under the illumination of visible light (λ＞420 nm). The degradation efficiency of the BiVO 4 /BiOBr composite is dramatically promoted compared with that of pure BiVO 4 . The significant promotion of the photocatalytic degradation performance can be attributed to the existence of the heterojunction electric field formed on the interface between BiVO 4 and BiOBr, which significantly enhances the separation efficiency of the photogenerated electrons and holes.
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2017
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IF 2.843
Mengqian Yuan,Fan Tian,Guangfang Li,Huiping Zhao,Yunling Liu,Rong Chen
In this work, hierarchical nanostructures Fe(III)-modified BiOBr were successfully prepared via a facile one-step route at room temperature. Compared with pure BiOBr, Fe(III)-modified BiOBr samples possess enhanced photocatalytic abilities for benzyl alcohol oxidation and organic dye degradation in the presence of H2O2 upon light illumination. The improved photocatalytic oxidation and degradation ability of Fe(III)-modified BiOBr is ascribed to the enhanced photogenerated carriers separation efficiency and promoted production of ·OH due to the generation of Fe2+ ions via interfacial charge transfer from Fe3+ ions. This work provides a facial approach to improve photocatalytic efficiency for organic synthesis and environmental remediation.
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
高影响因子
APPLIED SURFACE SCIENCE
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2016
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IF 3.15
Xue Yu,Junjie Shi,Lijuan Feng,Chunhu Li,Liang Wang
A series of BiOBr/reduced graphene oxide (RGO) aerogel was fabricated using a two steps hydrothermal method. Various methods such as SEM, TEM, DRS and Raman spectroscopy were employed to fully characterize the as-obtained BiOBr/RGO. Their photocatalytic degradation of methyl orange (MO) were studied under visible light irradiation. The combination of BiOBr and RGO result in an improved activity. The sample with 10 wt% RGO abbreviated as BiOBr-G10 shows the highest activity. Moreover, this sample exhibits a selective visible-light photocatalytic behavior as the degradation rate over MO (80%) is much higher than that over Rhodamin B (50%) and phenol (35%) in 60 min. The XRD and photoluminescence emission spectroscopy characterization of the BiOBr-G10 samples indicates an increased crystallization of BiOBr and efficient quenching of photo-excited electrons and holes contributes to the improved photocatalytic activities.
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
Catalysts
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2025
·Vol. 15
·期 8
·771
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IF 4
Yufeng Qin,Xinyu Peng,Tong Wu,Yi Zhong,Hong Xu,Zhiping Mao,Linping Zhang
As a common semiconductor material, BiOBr has a unique layered structure and a suitable bandgap. However, the slow electron–hole separation efficiency leads to poor photocatalytic performance. To solve this problem, BiOBr/BNQDs heterojunctions were constructed. BiOBr/BNQDs composite photocatalysts were prepared by the solvothermal method, and the cocatalyst BNQDs were loaded onto BiOBr via electrostatic adsorption to enhance the photocatalytic degradation activity towards Rhodamine B (RhB). The photocatalysts were characterized by FT-IR, XRD, XPS, SEM-EDS, UV-Vis, PL, EIS, etc. Compared with pure BiOBr, the construction of heterojunctions BiOBr/BNQDs realized the rapid elimination of weak carriers and the effective separation and enrichment of high-energy carriers, which improved the efficiency of photocatalytic degradation of RhB. Among them, BiOBr/BNQDs-8.3% demonstrated the highest photocatalytic activity. The degradation rate of RhB under visible light irradiation for 60 min was up to 98.56%, and the reaction rate constant was 0.0696 min−1, which was 2.80 times that of pure BiOBr. Moreover, after five photocatalytic cycles, the degradation rate was still 87.58%, demonstrating good cycling stability.
研究领域:
材料科学
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化学工程
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环境科学
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纳米技术
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Zeqing Long,Guangming Zhang,Hongbiao Du,Jia Zhu,Jinwei Li
Recently, the photocatalytic reduction of Cr(VI) has been extensively studied. Herein, we successfully prepared the BiOBr-Bi 2 S 3 heterojunctions with high photocatalytic Cr(VI) reduction performance using an ion exchange method. The optimal BiOBr-Bi 2 S 3 heterojunction (prepared with BiOBr, pH of 6.0, 2 mmol Na 2 S 2 O 3 ·5H 2 O,) achieved 100% removal of Cr(VI) within 12 min. The performance of photo-reduced Cr(VI) was about 28.9 and 184.6 times higher than that of pure Bi 2 S 3 and BiOBr, respectively. Besides, BiOBr-Bi 2 S 3 heterojunctions had a good adsorption efficiency for Cr(III), suggesting that they could be applied as bifunctional photocatalyst. The formation process and photoelectric properties of the BiOBr-Bi 2 S 3 heterojunctions were revealed by a series of characterizations. In conclusion, this work reported the synergistic effect of adsorption and photocatalysis of the BiOBr-Bi 2 S 3 heterojunctions for Cr removal for the first time, suggesting that the BiOBr-Bi 2 S 3 heterojunctions could act as a novel photocatalytic adsorbent to treat the Cr(VI)-containing wastewater.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
RSC Advances
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2022
·Vol. 12
·期 32
·20628-20639
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IF 4.036
Jianhong Lu,Junhong Bie,Shuai Fu,Jiaqi Wu,Qiang Huang,Pengli He,Zhe Yang,Xiuji Zhang,Huijie Zhu,Peiyuan Deng
Efficient S-scheme heterojunction photocatalysts were prepared through in situ growth of AgBiO3 on BiOBr. The self-assembled hierarchical structure of AgBiO3/BiOBr was formed from flower-like AgBiO3 and plate-like BiOBr. The optimized AgBiO3/BiOBr heterojunction possessed excellent visible-light photocatalytic degradation efficiency (83%) for ciprofloxacin (CIP) after 120 min, with 1.46- and 4.15-times higher activity than pure AgBiO3 and BiOBr, respectively. Furthermore, the removal ratio of multiple organic pollutants including tetracycline, Rhodamine B, Lanasol Red 5B and methyl orange was also investigated. Environmental interference experiments demonstrated that high pollutant concentrations, low photocatalyst dose and the addition of ions (SO42−, PO43−, HPO42−, H2PO4−) inhibited the photocatalytic activities. Subsequently, a simultaneous degradation experiment showed the competitive actions between CIP and RhB for radicals, decreasing the photocatalytic activity of CIP. Furthermore, trapping and electron spin resonance experiments showed that h+ and ˙O2− played a certain role in the degradation process and that ˙OH acted as assistant.
研究领域:
材料科学
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环境科学
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Huiming Shi,Quanquan Shi,Xinrui Gu,Binli Wang,Brock Lumbers,Gao Li
The highly efficient photo-oxidation of alcohols has sparked significant potential to cope with environmental pollution and the ever-increasing energy crisis. This study reports a unique Ti 3 C 2 /BiOBr (TB) heterojunction with a rich inter-face based on in situ exfoliation of MXene and subsequently anchored onto BiOBr sheets. The TB nano-composites exhibited substantially improved photo-catalytic activity towards the photo-oxidation of benzyl alcohol (BA) to benzaldehyde and achieved a formation rate of 1.73 mmol g −1 h −1 , greater than pristine BiOBr. The ultra-thin inter-facial contact boosted the oxygen vacancies (O v ) and Ti 3+ and possessed the most negative adsorption energy, which boosted the transfer and separation of inter-facial charge carriers and the adsorption and dissociation of BA. Overall, the successful synthesis of TB composite, along with its exceptional photo-catalytic performance, offers valuable insights for applications in green chemistry and environmental remediation.
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
RSC Advances
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2019
·Vol. 9
·期 25
·14391-14399
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IF 3.049
Kangli Liu,Xiaochao Zhang,Changming Zhang,Guangmin Ren,Zhanfeng Zheng,Zhiping Lv,Caimei Fan
Photocatalytic reduction of CO2 using solar energy to decrease CO2 emission is a promising clean renewable fuel production technology. Recently, Bi-based semiconductors with excellent photocatalytic activity and carbon-based carriers with large specific surface areas and strong CO2 adsorption capacity have attracted extensive attention. In this study, activated carbon spheres (ACSs) were obtained via carbonization and steam activation of phenolic resin-based carbon spheres at 850 °C synthesized by suspension polymerization. Then, the BiOBr/ACSs sample was successfully prepared via a simple impregnation method. The as-prepared samples were characterized by XRD, SEM, EDX, DRS, PL, EIS, XPS, BET, CO2 adsorption isotherm and CO2-TPD. The BiOBr and BiOBr/ACSs samples exhibited high CO selectivity for photocatalytic CO2 reduction, and BiOBr/ACSs achieved a rather higher photocatalytic activity (23.74 μmol g−1 h−1) than BiOBr (2.39 μmol g−1 h−1) under simulated sunlight irradiation. Moreover, the analysis of the obtained results indicates that in this photocatalyst system, due to their higher micropore surface area and larger micropore volume, ACSs provide enough physical adsorption sites for CO2 adsorption, and the intrinsic structure of ACSs can offer effective electron transfer ability for a fast and efficient separation of photo-induced electron–hole pairs. Finally, a possible enhanced photocatalytic mechanism of BiOBr/ACSs was investigated and proposed. Our findings should provide new and important research ideas for the construction of highly efficient photocatalyst systems for the reduction of CO2 to solar fuels and chemicals.
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
INORGANIC CHEMISTRY COMMUNICATIONS
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2020
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IF 1.943
Tongtong Liu,Yawen Wang
Platinum loaded BiOBr with iodine doping photocatalyst (Pt/I-BiOBr) was synthesized to further improve the photocatalytic activity of BiOBr. The photocatalytic test showed the bisphenol A degradation efficiency of Pt/I-BiOBr under visible light was about 93% within 20 min, about 5.8, 1.5 and 1.3 times that of BiOBr, iodine doped BiOBr and platinum loaded BiOBr, respectively. The composition, morphology, optical property and dominant active radical were investigated. Based on the results, a possible mechanism was proposed. Iodine doping and platinum loading played a synergetic effect on broadening the visible light absorption range and increasing the photo-induced carrier separation efficiency of BiOBr.
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
Journal of Science-Advanced Materials and Devices
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2023
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IF 8
Shuai Fu,Yanqiang Du,Junhong Bie,Zhiquan Huang,Hai Hu,Qiang Huang,Huijie Zhu,Wei Yuan,Leicheng Li,Bo Liu
Z-scheme Ag 2 WO 4 /BiOBr heterojunction with rich oxygen vacancies was successfully synthesized by the simplest hydrothermal method, which was systematically characterized in the structural, optical and electronic properties. The photocatalytic applications of Z-scheme Ag 2 WO 4 /BiOBr heterostructure with different weight percentages of Ag 2 WO 4 were studied. The optimized Ag 2 WO 4 (20%)/BiOBr heterostructure exhibited superior photodegradation efficiencies (98%) towards Lanasol Red 5 B (LR5B), which was 4.67- and 3.38-fold higher than pristine BiOBr and Ag 2 WO 4 , respectively. The principal reason for the elevated photocatalytic property of Ag 2 WO 4 /BiOBr was ascribed to the formation of oxygen vacancies and intimate Z-scheme heterostructure between Ag 2 WO 4 and BiOBr, improving the light trapping capability and facilitating separation of photo-induced charge. Moreover, the removal efficiencies of Ag 2 WO 4 /BiOBr heterostructure towards TC (tetracycline), CIP (ciprofloxacin) and RhB (rhodamine B) were 74%, 23%, and 13%, respectively. The simultaneous degradation experiment confirmed the competitiveness between LR5B and CIP for active species, leading to the inferior degradation efficiency for LR5B, along with the experimental factor towards LR5B was researched. The probable Z-scheme mechanism and the significant role of hydroxyl radical and superoxide radicals were demonstrated by the radical capture experiment and electron spin resonance (ESR). The Z-scheme mechanism has resulted in prominent improvement in charge separation, along with higher redox properties, which were responsible for the excellent photocatalytic activity.
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
Surfaces and Interfaces
·
2023
·
IF 6.2
Hongjie Liu,Minchen Hou,Hao Fu,Anjie Hu,Yanliang Zhai,Liwei Wang,Dong Zhai,Shaolong Zhang,Shaopeng Wang
Semiconductor photocatalysis is an ideal and sustainable solution to effectively remove Tetracycline (TC). Herein, a hierarchical flexible nanofibrous film (NF) heterojunction photocatalyst of BiOBr/TiO 2 was fabricated via a combination of electrospinning and solvothermal method, obtaining the two-dimensional (2D) BiOBr nanosheets uniformly anchored on the surface of one-dimensional (1D) TiO 2 nanofiber, and the amount of BiOBr significantly influences the physicochemical properties of the heterojunction photocatalyst, the optimal sample of BT-2 manifests large pore size and high surface area, prominent visible light response ability and narrow band gap as well as outstanding charge separation efficiency, thus achieves significantly enhanced photocatalysis activity for TC degradation, which is about twice higher than that of the pristine TiO 2 NF. More importantly, the BT-2 sample also displays high reusability and stability over a 10-cycle period and can be easy to recover. Meanwhile, the radical scavenging experiments and electron spin resonance characterization reveal that ·O 2 – and h + occupy an irreplaceable role in degrading TC. Moreover, regarding the analysis of intermediates and density functional theory calculations, the TC photodegradation mechanism and pathways are proposed. Our finding offers a prospective solution for designing BiOBr/TiO 2 heterojunction recyclable photocatalysts for efficient TC photodegradation.
研究领域:
环境科学
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材料科学
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光催化技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）