NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Sujing Zou,Xu Lu,Xiqiang Mao,Lei Wu,Jun Li,Shaoyi Li,Jian Yang,Ximei Fan
In photocatalysis, the construction of double Z-type heterojunction can effectively improve the photogenerated carrier separation efficiency, enhance the light absorption capacity and improve the photocatalytic reaction rate. Herein, a series of TiO2/KWO/BiOBr photocatalysts are successfully synthesized via hydrothermal and electrostatic self-assembly method. All the samples are investigated and characterized by X-ray diffraction, Scanning electron microscopy, Ultraviolet–visible spectroscopy and X-ray photoelectron spectroscopy to insight into the microstructures and optical properties. During the photocatalytic degradation of toluene experiments, the optimized TiO2/KWO/BiOBr sample exhibits the excellent photocatalytic performance. Under the irradiation of xenon lamp for 120 min, degradation rate of toluene reaches 95%, which is 10.75, 7.12 and 7.41 times higher than that of TiO2, KWO and BiOBr, respectively. The UV–vis diffuse reflectance, electrochemical impedance spectroscopy and transient photocurrent response of the TiO2/KWO/BiOBr photocatalyst verify that the enhanced photocatalytic activity is ascribed to its expanded light absorption range and the efficient separation efficiency of photogenerated carriers. In addition, the degradation experiments of toluene are also carried out in different atmospheres which could control the formation of different free radicals. It shows that superoxide anions and hydroxyl radicals play critical roles in the toluene degradation. The corresponding photocatalytic degradation mechanism is proposed that the excellent photocatalytic activity is attributed to providing more active sites and strong oxidation capacity for toluene.
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
Nanomaterials
·
2022
·Vol. 12
·期 8
·1382
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IF 5.719
Qi Zeng,Chu-Ya Wang,Bo-Xing Xu,Jianyu Han,Xin Fang,Guangcan Zhu
Bismuth oxybromide (BiOBr), with its special layered structure, is known to have potential as a visible-light-driven photocatalyst. However, the rapid recombination and short lifetime of the photogenerated carriers of BiOBr restrict its photocatalytic efficiency for the degradation of organic pollutants. Given the similar ionic size of Ce and Bi, Ce atoms might be easily introduced into the crystal of BiOBr to tailor its band structure. In this study, Ce doped BiOBr (Ce-BiOBr) samples with different percentages of Ce contents were prepared via a hydrothermal method. The intrinsic photocatalytic efficiency of Ce0.2-BiOBr for the degradation of bisphenol A (BPA) was 3.66 times higher than that of pristine BiOBr under visible light irradiation. The mechanism of Ce-doping modification for the enhanced photocatalytic performance was demonstrated based on a series of experiments and DFT calculation. The narrowed bandgap, the enhanced charge separation efficiency and Ce-doping energy level contributed to the remarkable photocatalytic performance of Ce-BiOBr.Keywords:bismuth oxybromide (BiOBr);Ce-doping modification;doping energy level;visible light;bisphenol A (BPA)
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
PubMed
高影响因子
CHEMOSPHERE
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2024
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IF 8.1
Le-Xuan Liu,Chang Liu,Bin Li,Ya-Meng Dong,Xin-Hui Wang,Xing Zhang
Oxygen vacancies (OVs) have garnered significant interest for their role as active sites, enhancing the catalytic efficiency of various catalysts. Despite their widespread application in environmental purification processes, the generation of OVs conventionally depends on high-temperature conditions and strong reducing agents for the extraction of surface partial oxygen atoms from catalysts. In this work, bismuth oxybromide (BiOBr) nanosheets with varying levels of OVs were synthesized via a simple and effective solvothermal method. This novel method affords precise control over the conduction band (CB) and valence band (VB) positions of BiOBr. The presence of different OVs exhibited varying photocatalytic efficiencies in the degradation of bisphenol A (BPA) under visible light irradiation, with higher levels of OVs resulting in superior photocatalytic performance. Furthermore, radical scavenger experiments demonstrated that superoxide oxides ( O 2 • − ) and holes (h + ) were the primary reactive oxygen species for BPA degradation. Additionally, BiOBr-OVs exhibited excellent anti-interference and stability in water matrices containing diverse inorganic anions and organic compounds. This work provides a simple and effective approach for the fine-regulating of catalysts through interfacial defect engineering, paving the way for their practical application in environmental decontamination.
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
Hua Lei,Huanhuan Zhang,Yan Zou,Xiaoping Dong,Yanmin Jia,Feifei Wang
Bismuth oxybromide (BiOBr) has been proved to be a potential photocatalyst for removal of organic pollutants, but the insufficient separation of photo-generated electrons and holes results in its low photocatalytic activity. In this work, we utilized the piezoelectric-like behavior of BiOBr to suppress the recombination of photo-excited charges. Under the excitation of the piezo-vibration and the irradiation using a 9 W white LED, the BiOBr catalyst shows a high reaction rate for catalytically decomposing organic dyes, which is 5.62 and 11.0 times of those from the individual photocatalysis and piezocatalysis, respectively. This catalyst has high structural stability and can be recycled for reuse, as well as presents good activity for degrading different organic pollutants via the synergetic photocatalysis/piezocatalysis process. On the basis of the piezoelectric-like effect and our experimental results, a possible catalytic mechanism has been proposed considering the separation of photo-induced charges and the formation of highly active radicals. This work associates photocatalysis with piezoelectric-like effect for improving the catalytic performance of BiOBr, hopefully providing a new and efficient approach not only for wastewater treatment, but also for other catalytic 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
LANGMUIR
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2020
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IF 3.557
Jie Yue,Guochang Wen,Guina Ren,Shaowang Tang,Bo Ge,Limin Zhao,Xin Shao
This research was focused on the raw material level construction of bismuth oxybromide (BiOBr) catalysis-loaded 3D cross-linked network polyurethane (PU) foam via the in situ polymerization method. After modification of superhydrophobic polydivinylbenzene nanoparticles, the PU foam possessed excellent superhydrophobic stability. The larger selective absorption oil phase capacity depended on its macroporous structure, and the existence of catalyst BiOBr (the band gap energy was about 2.57 eV) among the PU foam played a crucial role in degrading water-soluble contaminants under visible light irradiation. In this article, the photocatalytic experiment results verify that it has remarkable recycle degradation ability (the degradation efficiency can reach ∼97%) and the capture experiments indicate that the uppermost active species is h+.
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
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2013
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IF 5.825
Shulian Wang,Wanhong Ma,Yanfen Fang,Manke Jia,Yingping Huang
Bismuth oxybromide (BiOBr) was prepared and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectroscopy (DRS). The BiOBr promoted detoxification of cylindrospermopsin (CYN) under UV ( λ < 350 nm) and visible light ( λ > 420 nm) illumination was studied. The results revealed that the toxic uracil unit of CYN was removed, and the carboxylic group of the degraded product was also decomposed, to give the innoxious tricyclic guanidine product under the title conditions. In contrast, the traditional Fenton reagents (Fe 2+ and H 2 O 2 ) limited to remove the uracil moiety of CYN with the carboxylic group intact. Presumably, the decarboxylation ability of BiOBr was induced by Br 4 p valence band hole ( h Br 4 p + ), and the degradation mechanism was also proposed based on the experimental results and theoretical calculation.
研究领域:
环境科学
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毒理学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Liang Zhang,Zhen Ma,Haidong Sun,Rongzi Zhang,Zilong Zhao,Jie Wang,Zhonglin Zhang,Zhong Liu,Jun Li,Xiao Du,Xiaogang Hao
Based on the superior selectivity of bismuth oxybromide (BiOBr) for Br - , the excellent electrical conductivity of carbon nanotubes (CNTs), and the ion exchange capacity of quaternized chitosan (QCS), a three-dimensional network composite membrane electrode CNTs/QCS/BiOBr was constructed, in which BiOBr served as the storage space for Br - , CNTs provided the electron transfer pathway, and QCS cross-linked by glutaraldehyde (GA) was used for ion transfer. The CNTs/QCS/BiOBr composite membrane exhibits superior conductivity after the introduction of the polymer electrolyte, which is seven orders of magnitude higher than that of conventional ion-exchange membranes. Furthermore, the addition of the electroactive material BiOBr improved the adsorption capacity for Br - by a factor of 2.7 in electrochemically switched ion exchange (ESIX) system. Meanwhile, the CNTs/QCS/BiOBr composite membrane displays excellent Br - selectivity in mixed solutions of Br - , Cl - , SO 4 2- and NO 3 – . Therein, the covalent bond cross-linking within the CNTs/QCS/BiOBr composite membrane endows it great electrochemical stability. The synergistic adsorption mechanism of the CNTs/QCS/BiOBr composite membrane provides a new direction for achieving more efficient ion separation.
研究领域:
材料科学
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环境工程
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
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2022
·Vol. 12
·期 11
·1909
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IF 5.719
Chu-Ya Wang,Qi Zeng,Li-Xia Wang,Xin Fang,Guangcan Zhu
Based on the low utilization rate of visible light and the high-charge carriers-recombination efficiency of bismuth oxybromide (BiOBr), in this work, noble metal Ag was used to modify BiOBr, and Ag-doped BiOBr nanoplates (Ag-BiOBr) were obtained through a one-step hydrothermal method. Compared with BiOBr, the absorption edge of Ag-BiOBr showed a redshift from 453 nm to 510 nm, and the absorption efficiency of visible light was, obviously, improved. Bisphenol A (BPA) was chosen as the target pollutant, to evaluate the photocatalytic performance of the samples. Ag0.1-BiOBr showed the highest degradation efficiency. The intrinsic photocatalytic activity of Ag0.1-BiOBr, under visible light, was approximately twice as high as that of BiOBr. In this way, a new visible-light-driven photocatalyst was proposed, to fight against organic pollution, which provides a promising strategy for water and wastewater treatment.Keywords:bismuth oxybromide (BiOBr);Ag-doping modification;visible light;charge separation;bisphenol A (BPA)
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
Science China-Technological Sciences
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2021
·Vol. 64
·期 10
·2292-2299
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IF 3.572
Miao Xiao,Liu Shuai,Wang Min,Ge Bo,Zhu ChangQing
It is an ideal way to produce clean water after sewage treatment, during which two problems need to be solved: (1) how to deal with water soluble pollutants and surface oil slick; (2) photothermal devices should float on water. This paper presents a multifunctional water treatment device that can produce clean water vapor under light after sewage treatment. The bismuth oxybromide catalyst degrades water-soluble pollutants under light irradiation. Superhydrophobic (SH) melamine sponge has two functions: selectively adsorb surface oil slick and ensure that photothermal devices float. The hydrophilic layer provides water for local heating of the photothermal layer to produce water vapor. The SH sponge remains stable and is easy to operate during wastewater treatment, and the efficiency of water vapor production through the photothermal device is increased by 7.2 times compared with that of pure water.
研究领域:
环境科学
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材料科学
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污水处理
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产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2019
·Vol. 46
·期 1
·509-520
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IF 2.064
Tang Chang-cun,Fang Yan-fen,Cao Xin-qiang,Tian Hai-lin,Huang Ying-ping
In this paper, bismuth oxybromide (BiOBr) photocatalysts were synthesized in the presence of tetrabutylammonium bromide (TBAB) at the different volume fractions of ethanol/water and named as BiOBr 0 , BiOBr 20 , BiOBr 50 , BiOBr 80 and BiOBr 100 , respectively. The samples were characterized and applied to the degradation of Rhodamine B (RhB) under visible-light irradiation ( λ ≥ 420 nm). The results indicated that both TBAB and ethanol significantly affected the crystal phase, morphology and surface charge distribution of BiOBr. The exposed (110) faces of BiOBr with Bi 3+ sites contributed to its photocatalytic activity via the enhanced separation of electrons and photogenerated holes as well as the better photo-stability. BiOBr 50 showed the optimal activity for the photodegradation of RhB. Superoxide radical (O ·− 2 ) as the dominant active species was responsible for the degradation of RhB.
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
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2015
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IF 7.435
Haiping Li,Tingxia Hu,Jianqiang Liu,Shue Song,Na Du,Renjie Zhang,Wanguo Hou
A series of BiOBr nanosheets was hydrothermally synthesized through pH adjustment of precursor suspensions. X-ray diffraction, X-ray photoelectron spectroscopy, electronic microscopy and UV–vis diffuse reflectance spectroscopy analyses indicate that these nanosheets possess similar crystallinity, surficial composition, structures, band gaps and highly exposed (0 1 0) facets, but different lateral sizes and thicknesses. The visible-light photoactivity of these nanosheets in photodegradation of salicylic acid increases with reduced nanosheet thickness. An inversely linear relationship was obtained between the pseudo-first-order rate constant ( k ) and the nanosheet thickness. The photoactivity enhancement of the samples with reduced nanosheet thickness is ascribed to the decreasing recombination efficiency of photogenerated charge carriers. This study indicates that the photoactivity of the BiOBr nanosheets with dominant exposed (0 1 0) facets decisively depend on the nanosheet thickness, rather than the percentage of exposed active facets ((0 0 1) facets), which may be universal for other two-dimensional photocatalysts.
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
Materials Today Chemistry
·
2025
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IF 6.7
Rui Chen,Pengcheng Yu,Biao Zhang,Zhiqi Yang,Jinjie Wang,Yuhang Wang,Lili Wang,Chunnuan Yu,YuanQiang Li,Yan Cheng
The healing of wounds at movable part remains a significant challenge due to bacterial infections and mechanical external forces induced by unavoidable movements. Herein, bismuth oxybromide nanosheets (BiOBr NSs) with piezoelectric properties were developed to promote wound healing in such regions by converting repetitive mechanical motion into a driving force that activates BiOBr generating an electric field at the wound site. Additionally, oxygen vacancies were also introduced into BiOBr NSs to impart near infrared (NIR)-triggered photothermal and photodynamic antibacterial activity. Two types of BiOBr NSs were synthesized, differing in oxygen vacancy density: BiOBr-L with a lower density and BiOBr–H with a higher density. BiOBr–H NSs exhibited enhanced electron-hole separation ability, resulting in superior antibacterial efficacy with NIR irradiation compared to BiOBr-L NSs. Furthermore, both BiOBr NSs promoted cell migration and proliferation due to their piezoelectric properties. In vivo assessments demonstrated that BiOBr NSs significantly accelerated the healing of neck wounds. This study not only presents an effective strategy for designing wound dressings for wounds at movable parts but also broadens the biomedical applications of nanomaterials with piezoelectric and photoelectric properties.
研究领域:
生物医学工程
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材料科学
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纳米医学
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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）