JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Jiajing Zhang,Suwei Wang,Pin Song,Ang Li,Wei Jiang,Jun Di
The insufficient solar light response ability of the photocatalyst, rapid recombination of interface charges, and lack of active sites significantly inhibit the efficiency of photocatalytic CO 2 reduction. Addressing these challenges simultaneously is a very challenging task. Herein, an interface engineering coupled surface polarization strategy is proposed to optimize the CO 2 photoreduction performance. The copper tetracarboxyphenylporphyrin (CuTCPP) modified BiOBr/Bi 19 S 27 Br 3 (BBS) heterostructure was developed. The built-in electric field formed between BiOBr and Bi 19 S 27 Br 3 interfaces induces the effective interfacial charge separation, while the surface polarization of CuTCPP induces the transfer of electrons from the conduction band (CB) of BBS to the CB of CuTCPP. Benefiting from this unique configuration and abundant active sites in CuTCPP, greatly improved photocatalytic CO 2 reduction performance can be realized. Without adding cocatalysts and sacrificial agents, the optimized CO generation performance of CuTCPP-BiOBr/Bi 19 S 27 Br 3 (BBS-CT) is 3.5 times higher than that of BBS. This work provides valuable insights of interface engineering coupled surface polarization strategy for collaborative improve the photocatalytic CO 2 reduction performance.
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
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Yang Liu,Zhuofeng Hu,Jimmy C. Yu
Doping heterogeneous atoms into BiOX is recognized as an effective method to improve its photocatalytic activity. Here, S-doped BiOBr (S–BiOBr) was synthesized via a solvothermal method in the absence of water, which is supposed to substitute O as S 2− in the lattice. This material is firstly used for the visible-light-driven degradation of ibuprofen, a model anti-inflammatory drug. The degradation efficiency of S–BiOBr is much higher than that of pure BiOBr. The degradation kinetic constant for S–BiOBr (2.48 × 10 −2 min −1 ) is about 3 times as high as that of pure BiOBr (0.83 × 10 −2 min −1 ). It is found that S-doping tunes the band structure of BiOBr, leading to a narrower band gap and thus higher utilization efficiency of visible light. The degradation of ibuprofen on S–BiOBr can be attributed to the generation of H 2 O 2 and OH radicals. OH radical plays a synergistic role along with holes in the photocatalytic degradation process, which is supposed to be better than the reported single hole- or superoxide-dominant reaction. This work reveals a previously unrecognized and more efficient method for the degradation of organic contaminants on BiOBr.
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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DOI
PubMed
高影响因子
Journal of Biomedical Research
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2018
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IF 0
Mei-qing Sun,Zhan-lin Ding,Hong Wang,Guang-ping Yu,Li,Ming-chun Li,Meng-meng Zhen
BiOBr nanosheets are important photocatalytic nanomaterials. However, their biological effects remain to be explored. In this study, we investigated the antifungal effect of BiOBr nanosheets on Candida albicans . Strikingly, the nanosheets strongly inhibited the growth of C. albicans [IC 50 =(96±4.7) mg/L], hyphal development and biofilm formation. Compareed to the antifungal effect of the cationic surfactant cetyltrimethylammonium bromide, the inhibitory effect of the nanosheets on fungal pathogen was attributed to cetyltrimethylammonium bromide adsorbed by the nanosheets. Thermal gravity analysis and cetyltrimethylammonium bromide release experiment indicated that only 0.42% cetyltrimethylammonium bromide on BiOBr nanosheets was released. Taken together, this study uncovers the contribution of surfactant released from the nanosheets to their antifungal activity.
研究领域:
微生物学
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纳米医学
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药物递送
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DOI
PubMed
ACS Applied Nano Materials
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2024
·
IF 5.3
Xia Cheng,Xinyan Xiao,Fei Wang,Ting Lu,Yu Zhang
Photocatalysis is extensively implemented in organic pollutant degradation, and the critical point is to develop outstanding and stable photocatalysts. Herein, the synthesis of coral reef-like α-Bi2O3/BiOBr heterostructure photocatalysts involves the in situ growth of BiOBr nanosheets onto α-Bi2O3, with the latter derived through calcination utilizing a bismuth-based metal–organic framework (CAU-17) as the precursor. Under simulated sunlight, the 20% α-Bi2O3/BiOBr heterojunction degraded nearly 97.7% of RhB in 60 min, while pure α-Bi2O3 and BiOBr nanosheets degraded only 7.8 and 65.3%, respectively. Furthermore, the 20% α-Bi2O3/BiOBr nanocomposite exhibited superior recycling stability, degrading 86.6% RhB after four cyclic experiments. This is attributed to the fact that the nanoscale α-Bi2O3 material obtained by calcination can retain the exoteric diffusion channels of CAU-17, making α-Bi2O3/BiOBr heterojunctions have an enormous specific surface area, providing more adsorption sites and promoting their photocatalytic capacity. Free radical capture tests and electron paramagnetic resonance measurements indicated that h+ and •O2– were the primary active substances during photodegradation. On the basis of that, a feasible photodegradation mechanism of type II α-Bi2O3/BiOBr heterojunctions was proposed. This study opens up the possibility of designing type II heterojunctions with MOFs as precursors for dye degradation.
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
ChemistrySelect
·
2025
·Vol. 10
·期 8
·e202405123
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IF 2
Qing Zhang,Yan Xie,Hanping Fu,Shufen Ren,Jiayun Cheng,Qingshuang Liang,Xiufeng Xiao
Graphical BiOCl/BiOBr Z-type heterojunction plays a crucial role in promoting charge transfer and separation during the photocatalytic hydrogen peroxide production, and retaining the strong redox ability of electrons/holes on different active sites. The photocatalytic pathway of the BiOCl/BiOBr Z-type heterojunction is in the dual-channel route. Photocatalytic hydrogen peroxide production is considered an important technology for alleviating environmental problems and energy scarcity at present. In this work, a series of BiOCl/BiOBr Z-type heterojunctions were successfully synthesized by a facile one-step method. The successful formation of the heterostructure was confirmed through techniques such as XRD, SEM, HRTEM, FTIR, and XPS. Notably, the heterojunction exhibited significantly enhanced photocatalytic performance in hydrogen peroxide production. The best performing sample (BiOCl/BiOBr 2:8) showed the highest hydrogen peroxide concentration of 10.8 mmol/L. PL and EIS results demonstrated the crucial role of the heterojunction in promoting charge transfer and separation during the photocatalytic process, and retaining the strong redox ability of electrons/holes on different active sites. The free radical trapping experiments results and electron spin resonance spectra demonstrated that photocatalytic pathway of the as-prepared heterojunctions was in the dual-channel route, from both oxygen reduction and water oxidation. This work might provide a reliable strategy for photocatalytic hydrogen peroxide production via photocatalysis.
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 Catalysis
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2022
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IF 13.7
Yan Shi,Jingzhi Li,Di Huang,Xiawei Wang,Yingping Huang,Chuncheng Chen,Ruiping Li
The oxygen-vacancy (OV)-rich BiOBr exhibits higher photocatalytic activity than that of the OV-deficient one. The interaction of the target substrate with the surface OV sites should be essential for the high activity, but it is not well understood so far. Here, we used a cyanotoxin cylindrospermopsin (CYN) as a model substrate to investigate the specific adsorption of pollutants with highly hydrophilic groups on OV sites of BiOBr. We found that the adsorption of CYN on BiOBr with rich OVs is much stronger than the adsorption on BiOBr with poor OVs, and the BiOBr with rich OVs also exhibits a higher degradation rate of CYN. Various experiments indicated that the strong adsorption of CYN on OV-rich BiOBr originates from the strong interaction between the highly hydrophilic sulfate group of CYN and OV sites. Density functional theory calculations suggest that, on OV sites, Brönsted acid sites (OHB) are formed through the dissociative adsorption of water molecules. The combining effect of the hydrogen bonding with these OHB and the coordination with the Lewis acid Bi sites make the adsorption of the sulfate group quite strong. Such a strong interaction can well explain the rapid degradation of CYN, which proceeds through direct oxidation by h+ or by the OHB-derived •OH. Based on ultra-performance liquid chromatography–tandem mass spectrometry analysis, the CYN degradation begins via hydroxylation at the C5–C6 double bond in the uracil ring by •OH, which is further degraded by two pathways. This work provides a deeper understanding of the critical roles of OVs in the processes of adsorption and photocatalysis for organic pollutant removal.
研究领域:
环境科学
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材料科学
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毒理学
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DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
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2024
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IF 4.2
Min Qiu,Xue-Li Yang,Zi-Xuan Zhao,Qiu-Ping Luo,Ling Chen,Jun Du,Xing Fan,Bing-Xin Lei
The separation and transfer of photogenerated charges are limited by the deep energy defects and high exciton binding energy of Cs 2 AgBiBr 6 (CABB). The creation of heterostructure is a great promising path to solve this obstacle. In this paper, BiOBr (BOB) nanosheets epitaxially grew on the surface of CABB octahedrons through immersing CABB into in water-solution with the assistance of ethanol, thereby creating an interesting CABB/BOB heterojunction. The CABB/BOB heterostructure markedly enhances water stability, preserving its structure and morphology even after being submerged in a mixture of ethanol and water for 100 h. The CABB/BOB photocatalyst exhibited significantly enhanced photocatalytic activity towards the degradation of Rhodamine B in comparison to its individual pristine components, namely CABB and BOB. Specifically, the advanced CABB/BOB−90 photocatalyst attains a degradation efficiency of 98 % within 40 min, significantly surpassing the initial CABB and BOB photocatalysts by approximately 1.3 and 4.1 times, respectively. The heightened photocatalytic activity is attributable to the formation of a tightly integrated heterojunction interface, which promotes the efficient separation of charge carriers.
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
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
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IF 10.9
Haozhen Zhang,Jingjing Liu,Yong Zhang,Bei Cheng,Bicheng Zhu,Linxi Wang
Constructing step-scheme (S-scheme) heterojunctions has become a popular strategy for efficient photocatalytic H 2 O 2 generation. Herein, we in situ grew BiOBr nanosheets (NSs) on a Schiff-base covalent organic framework (COF) with large π-conjugated structures to prepare S-scheme BiOBr/COF photocatalysts for H 2 O 2 synthesis. The highest photocatalytic H 2 O 2 production performance of the composite sample constituting the S-scheme heterojunction is 3749 µmol g −1 h −1 , which was 1.85 and 27 times the rates of COF and BiOBr, respectively. The construction of S-scheme heterojunction contributed to efficient carrier transfer and separation in space and enhanced redox power. Moreover, the lying-down O 2 -adsorption configuration on the COF surface favors the concerted two-electron O 2 reduction process, which greatly reduced the reduction potential requirement for O 2 -to-H 2 O 2 conversion. The synergy between the S-scheme heterojunction and the unique O 2 –COF interaction boosted photocatalytic H 2 O 2 production 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
ACS Applied Nano Materials
·
2024
·
IF 5.3
Amin Jv,Lina Wu,Jiale Lu,Bo Feng,Guangbo Che,Renquan Guan,Yufei Zhang,Chunbo Liu,Jiankang Yu,Tiantian Sun
In the past few decades, photocatalytic technology has made significant contributions to addressing the environmental pollution and energy crisis faced by the human society in the 21st century. The key to photocatalytic technology lies in the development of efficient photocatalysts, with the short lifetime of photogenerated charge carriers posing a major bottleneck to photocatalytic efficiency. This work presents the fabrication of a BiOBr/Bi2O2CO3 heterojunction photocatalyst with an efficient charge transfer interface through the incorporation of surfactants and calcination treatment during the BiOBr synthesis process. The in situ construction strategy enables efficient charge transfer between BiOBr and Bi2O2CO3, thereby prolonging the lifetime of photogenerated carriers. By incorporating surfactants alone, the degradation rate of tetracycline by the BiOBr/Bi2O2CO3 heterojunction photocatalyst with optimal activity is increased by over two times compared with that by BiOBr alone. Furthermore, LC–MS and quantitative structure–activity relationship analysis confirmed a significant reduction in the toxicity of intermediates generated during the photocatalytic process in the environment. Detailed analysis of the mechanism behind the enhanced photocatalytic activity is provided in this study. This research offers a novel approach for the in situ construction of heterojunction interfaces with efficient charge transfer capabilities.
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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2024
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IF 5.8
Xiaohua Zheng,Mengnan Xu,Chenbin Cai,Yanhaohan Yuan,Feng Lin,Wei Chen,Fanger Yang
Photocatalysis is a green approach to solving energy and environmental problems, and researchers are still pursuing high-performance photocatalysts . Although BiOX (X = Cl or Br) has a suitable bandgap and good stability, its photoresponse is mostly concentrated in the UV region. Conversely, SnS 2 has a wide photoresponse range but exhibits perceptible photocorrosion and poor stability. To exploit the advantages of both BiOX and SnS 2 , this study hydrothermally synthesized and introduced superfine SnS 2 (∼30 nm in size) into a BiOCl/BiOBr binary system to fabricate BiOCl/BiOBr/SnS 2 composites. Subsequently, the degradation performance of these composites in a Rhodamine B solution under visible light was investigated. Results show that the BiOCl/BiOBr/SnS 2 heterojunctions were successfully prepared and the composites exhibited the best photocatalytic performance with 6% mass fraction of SnS 2 (BiOCl-to-BiOBr mol ratio = 1:1). The formation of a double S-schedule heterojunction between BiOCl/BiOBr and SnS 2 not only accelerated charge separation and transfer but also broadened the photoresponse range and reduced photoelectron–hole recombination under full-spectrum irradiation. Loading a small narrow-bandgap photocatalyst onto a large photocatalyst provides an effective way to construct heterojunctions with excellent photocatalytic performance. The ternary photocatalyst presents a favorable photocatalytic stability, and its photodegradation rate is 4.6, 4.5 and 220.5 times that of BiOCl, BiOBr and SnS 2 , respectively.
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
Catalysts
·
2022
·Vol. 12
·期 7
·719
·
IF 4.501
Hong-Juan Qin,Yu-Hang Zhang,Zhen Wang,Gui-Hua Yang
Photocatalysis provides a prospective approach for achieving high-value products under mild conditions. To realize this, constructing a selective, low-cost and environmentally friendly photocatalyst is the most critical factor. In this study, BiOBr/Zn@SnO2is fabricated by a one-pot hydrothermal synthesis method and BiOBr: SnO2ratio is 3:1; this material is applied as photocatalyst in fructose selective conversion to lactic acid. The bandgap structure can be regulated via two-step modification, which includes Zn doping SnO2and Zn@SnO2coupling BiOBr. The photocatalyst shows excellent conversion efficiency in fructose and high selectivity in lactic acid generation under alkaline conditions. The conversion rate is almost 100%, and the lactic acid yield is 79.6% under optimal reaction conditions. The catalyst is highly sustainable in reusability; the lactic acid yield can reach 67.4% after five runs. The possible reaction mechanism is also proposed to disclose the photocatalysis processes.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 47
·6729-6738
·
IF 2.6
Yeheng Zhang,Junnan Chen,Wensong Lin,Ran Gao,Xin Mai,Huanxia Lin,Yong He
In this work, BiOBr photocatalysts doped with zinc ions were manufactured to improve their photocatalytic degradation of methyl blue (MB). Among them, Zn2+/BiOBr-8 exhibited the highest photodegradation efficiency of MB after 100 min of illumination. After six-cycle experiments, it was found that its photocatalytic performance remained at a high level. The composition and microstructure of the materials were characterized by techniques such as XRD, FTIR, XPS, SEM, and TEM. The optical properties and the photodegradation performance of the materials were investigated by DRS, PL, photocurrent, and active species trapping experiments. The reasonable mechanism for photocatalytic degradation of MB was proposed.
研究领域:
材料科学
·
环境科学
·
光学
✓ 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）