Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2021
·
IF 4.051
Hailin Tian,Yan Gu,Houle Zhou,Yingping Huang,Yanfen Fang,Ruiping Li,Changcun Tang
In this work, bismuth bromideoxide (BiOBr), a typical visible-light photocatalyst , was coated with Zr-based MOFs (UiO-66) to prepare the BiOBr@UiO-66 photocatalysts with different mole ratios by the solvothermal method. The core–shell BiOBr@UiO-66 photocatalysts with abundant activated sites was obtained due to the modification of UiO-66 on the surface of BiOBr. The structure and properties of the BiOBr@UiO-66 photocatalysts were characterized by several methods. The 30% BiOBr@UiO-66 photocatalysts exhibited the biggest photodegradation rate constant (k = 0.0669 min −1 ) for RhB under visible-light irradiation than pure BiOBr (k = 0.0281 min −1 ) and UiO-66 (k = 0.0041 min −1 ). Additionally, the 30% BiOBr@UiO-66 photocatalysts exhibited the enhanced photocatalytic activity and stable recyclability due to the effective electron-hole separation and synergistic effect. The photocatalytic mechanism of the BiOBr@UiO-66 photocatalysts for RhB, which contained a photosensitization process, was discussed with the trapping experiment of active species and the proposed energy band alignments.
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 RESEARCH BULLETIN
·
2019
·
IF 3.355
Miao Hu,Aihua Yan,Xinyang Wang,Fei Huang,Qiaopeng Cui,Fan Li,Ji Huang
Ce-doped bismuth oxybromide (BiOBr) nanoplates were successfully synthesized by a facile hydrothermal method. The phase, composition, chemical state, microstructures, spectrum response, band gap, electron transfer and photocatalytic activity were analyzed in detail by a series of advanced tools. The results indicated that Ce 3+ ions were successfully incorporated into the crystal lattice of BiOBr. With the increase of Ce-doped amounts, the morphology gradually changed from nanowalls to nanoplates. Moreover, introducing Ce 3+ ions into BiOBr crystal not only slightly blue-shifed the adsorption edge, but also slightly widened the band gap. Compared to pure BiOBr, Ce-doped samples exhibited enhanced photocatalytic activity towards Rhodamine B (RhB) degradation under visible-light irradiation. The enhanced performance may result from higher specific surface area, faster charge transfer and lower carrier recombination. This works further reveal the mechanism of enhanced photocatalytic activity about rare-earth doped 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
RSC Advances
·
2015
·Vol. 5
·期 21
·16239-16249
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IF 3.84
Hong-Peng Jiao,Xiang Yu,Zhao-Qing Liu,Pan-Yong Kuang,Yuan-Ming Zhang
To overcome the drawback of low photocatalytic efficiency brought by fast electron–hole recombination and narrow photoresponse range, the heterostructured Bi2S3/BiOBr microspheres were designed and synthesized via a facile one-pot solvothermal method. The as-prepared heterostructured Bi2S3/BiOBr photocatalyst exhibits significantly enhanced photoelectrochemical performance and photocatalytic activity for decomposing rhodamine B (RhB) and Brilliant ponceau 5R (BP) compared with pure BiOBr under visible light irradiation, which could be mainly attributed to the formation of a heterojunction in the Bi2S3/BiOBr interface, which can efficiently facilitate the separation of photogenerated electron–hole pairs. Furthermore, a terephthalic acid photoluminescence (TA-PL) probing test and radical trapping experiments demonstrate that the h+ and ·O2− radicals are the dominant reactive species while ·OH radicals could be neglected. In addition, the possible enhanced photocatalytic mechanism is proposed on the basis of the calculated energy band positions and radical trapping experiments.
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 HAZARDOUS MATERIALS
·
2014
·
IF 4.331
Chengqun Xu,Honghai Wu,Feng Long Gu
BiOBr/Na–montmorillonite composites (BiOBr–Mt) were prepared under laboratory ambient conditions by using the surfactant cetyltrimethylammonium bromide (CTAB) as the Br source and template, and the as-synthesized samples were characterized by XRD, FT-IR, FESEM, TEM equipped with EDS, BET and UV–vis DRS techniques. Interestingly, the particle size of BiOBr can be controlled by CTAB modified Na-montmorillonite. The photocatalytic activity of the as-prepared was further evaluated by decomposition of Rhodamine B (RhB) under visible light irradiation; the obtained results revealed that the BiOBr–Mt sample had strong photoabsorption in the visible light region. It has higher photocatalytic activity than pure BiOBr alone. There exists an efficient adsorption for RhB onto BiOBr–Mt contrast to that onto the pure BiOBr. The adsorption processes can be well described by pseudo-second-order kinetic model; meanwhile, the adsorption behaviors can be described by both Freundlich and Langmuir equations but the former was better. Additionally, the relevant adsorption and degradation mechanisms were explored and the possible mechanisms were presented. The photocatalytic activity has high effect both in acidic and basic conditions on the degradation reaction but in acidic condition is more favorable. After three recycles, BiOBr–Mt did not exhibit any significant loss of photocatalytic activity, confirming the photocatalyst was essentially stable.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
·
IF 10.588
Yingying Chen,Hailin Tian,Wenxue Zhu,Xin Zhang,Ruiping Li,Chuncheng Chen,Yingping Huang
Cefazolin (CFZ) is widely present in the wastewater treatment effluents and in receiving waters and has caused severe impacts to the ecosystem. CFZ degradation by photocatalysis has attracted increasing attention due to its eco-friendly features. Herein, we presented a green synthesis strategy for a highly active BiOBr photocatalyst for CFZ removal with L -cysteine as a directing agent, and the role of thiol in cysteine for facets control and morphology regulation was discussed. We found that the photoactivity of cysteine-induced BiOBr nanosheet was much higher than those prepared by using arginine and glycine as directing agent. Further experiments showed that the cysteine preferentially coordinated Bi 3+ with thiol rather than carboxyl. The strong interactions of thiol group with the external surface of the BiOBr crystals stabilize the small crystals that have high surface energy without the cysteine. Such a chemical environment favors forming BiOBr crystalline with small size of high surface area and oriented growth in [110] direction, which facilitates the photogenerated electron-hole separation to achieve significantly promoted photocatalytic activity. Moreover, the cysteine-directed BiOBr nanosheets displayed good photoreactivity to more pollutants (i.e. rhodamine B, cefradine and cefoperazone sodium) and excellent reusability as verified via seven consecutive recycle experiments. The proper photocatalyst dosage (0.4 g/L), relatively acidic water environment (pH 3.4) and high temperature (35 °C) would be beneficial to CFZ photodegrdation by BiOBr. Also, the CFZ photodegradation mechanism and degradation pathway were also proposed by combining radical trapping experiments and electron spin resonance (ESR) test with LC-MS analysis in the photocatalytic process.
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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haifeng Yang,Zhiqiang Qiao,Weimiao Wang,Pengfei Tang,Shuaishuai Man,Xiaodong Li,YuTing Xie,Deyun Tang,Xueming Li,Guangcheng Yang
Private information protection of electronic chips which store large amounts of sensitive data, is a crucial issue in electromechanical systems nowadays. Here, a self-destructive microchip based on an instantaneous thermite reaction is designed to prevent the leakage of electronic information. The device is consisted of a silicon test wafer and an upper energetic film coated by a simple drop-casting technique. A series of Al/BiOX-based nanothermites have been prepared for decreasing the reaction sensitivity, meanwhile optimizing the destruction efficiency of the energetic film system. Among them, Al/Bi 2 O 3 nanothermite containing 30 wt% BiOBr possesses a low sensitivity (45 J), the maximum pressure peak (1.93 MPa) and pressure effect duration due to multiple interactions of the three nano-scale energetic components. Besides, the energetic film prepared by this nanothermite fomula also exhibits a more effective destruction of the device. The high-speed photography results demonstrate that the violent reaction shatters the thick energetic microchip (∼1 mm) within merely 0.5 ms. Importantly, the efficient destruction of energetic microchips shows excellent reproducibility in different working scenes, including Air or Ar atmosphere. It is believed that this self-destructive device with environmentally friendly components and simple but adaptive design can be extensively used in various electric microcomponents.
研究领域:
材料科学
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电子工程
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安全技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Chu-Ya Wang,Qi Zeng,Guangcan Zhu
Bisphenol A (BPA), a typical endocrine disrupting chemical, is widespread in aqueous environment and cannot be efficiently treated by traditional water treatment technologies . Bismuth oxybromide (BiOBr) is a promising photocatalyst with a special layered structure. However, its band gap (2.8 eV) is not narrow enough for the efficient harvesting of visible light, severely restricting its practical use. Given that the band gap of Bi 2 S 3 is only 1.3 eV, S-doping modification could be used to tailor the band structure of BiOBr. Here, series of S-doped BiOBr nanosheets was prepared through a facile hydrothermal procedure. The as-prepared S 0.2 -BiOBr nanosheets showed a narrower band gap of 2.33 eV. The intrinsic photocatalytic activity of S 0.2 -BiOBr sample for the degradation of BPA was 2.78 times higher than that of BiOBr under visible light degradation. Moreover, the mechanism of BPA degradation over the S-doped BiOBr under visible light irradiation was elucidated based on the experimental results and density functional theoretical calculations. Overall, a feasible and effective doping method was proposed to improve the utilization efficiency of visible light.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2025
·
IF 3.5
Zhang Yu,Xiao Xinyan,Wang Fei,Lu Ting,Cheng Xia
Photocatalytic degradation of dye wastewater has great potential due to its eco-friendly, simple, and solar energy-based characteristics. In this work, an energy-saving and convenient precipitation method was explored to compound two classical photocatalyst materials BiOBr and CAU-17. The Z-scheme heterojunction decreases the agglomeration of the BiOBr nanosheets and addresses the issue of the low photogenerated carrier participation rate of CAU-17. The solvothermal method was used to prepare CAU-17 nanorods, and then BiOBr nanosheets were grown on them at room temperature to fabricate BiOBr/CAU-17 composites. The samples were characterized by XRD, SEM, TEM, XPS, DRS, PL, EIS, and other techniques. The photodegradation performance was tested using Rhodamine B (RhB) as the model pollutant. The 80% BiOBr/CAU-17 composite (0.1 g/L) exhibited a degradation rate of 99.41% for RhB under simulated sunlight in 60 min, with an apparent rate constant of 0.0631 min⁻ 1 , which is 3.45 times faster than pure BiOBr and 315.5 times faster than CAU-17. Free radical capture and EPR tests confirmed that · O 2 ⁻ and h⁺ were the main active species in the process, and a reasonable photocatalytic mechanism is proposed. Additionally, cyclic tests are conducted to confirm the stability and durability of the composite, proving the potential of BiOBr/CAU-17 composites for efficient and sustainable photocatalytic applications.
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
LANGMUIR
·
2022
·
IF 4.331
Peng Du,Laihui Luo,Di Wang,Weiping Li,Dandan Wang,Zhihong Mai,Ye Wang,Weiguang Ran,Guozhong Xing
To settle the unsatisfying efficiency and insufficient light harvesting ability of photocatalysts, we report on the development of Er3+/Yb3+-codoped BiOBr (BiOBr:Er3+/xYb3+) microparticles that were synthesized by a rational high-temperature solid-state reaction method. The prepared microcrystals exhibit high visible upconversion (UC) emissions with maximum intensities at x = 0.01 when excited by a 980 nm laser. Remarkably, the corresponding UC emission process is attributed to a two-photon absorption route. Furthermore, the photocatalytic activities of as-synthesized compounds were further evaluated through analyzing the visible–near-infrared light-triggered tetracycline degradation. Compared with BiOBr:Er3+ microparticles, BiOBr:Er3+/xYb3+ microparticles present superior photocatalytic properties and the optimal status is achieved when x = 0.05, in which h+, ·O2–, and ·OH active species contribute to the photocatalytic mechanism. Additionally, the designed microparticles exhibit better photocatalytic abilities than previously reported photocatalysts (i.e., TiO2, SnO2) upon full-spectrum light irradiation. These results reveal that Yb3+ codoping is able to not only enhance the UC emission properties of BiOBr:Er3+ microparticles but also reinforce their photocatalytic activities. Our findings may put forward a facile strategy to regulate the photodegradation capacity of photcatalysts.
研究领域:
材料科学
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环境科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Hanlu Zeng,Yunlan Xu,Dengjie Zhong,Qingmei Qiao,Yuqin Yang,Jitai Li
Photocatalytic fuel cell (PFC) is a new device that can efficiently degrade organic pollutants and recover their energy. This paper used solvothermal method to prepare a flower-like copper bismuth oxide/bismuth oxy bromide/Chitosan/Titanium (CuBi 2 O 4 /BiOBr/CS/Ti) photoanode. It was then assembled with a Cu cathode to produce a PFC for reducing rhodamine B (RhB) and generating power. Different analytical methods were utilized to analyze the photoanode's chemical composition, crystal structure, and electrochemical properties. CuBi 2 O 4 /BiOBr/CS/Ti had higher photocatalytic activity than single and binary composite photoanodes, which had good stability. The RhB degradation rate, maximum power density ( P max ), maximum photocurrent density ( J sc ) and the fill factor ( FF ) of the PFC were 90.98 %, 30.80 μW·cm −2 , 0.283 mA·cm −2 and 0.22, respectively. The results of transient photocurrent (i-t), electrochemical impedance spectra (EIS) and Mott-Schottky (M-S) spectra, and free-radical capture experiments indicated that the enhancement of the photocatalytic performance of the CuBi 2 O 4 /BiOBr/CS/Ti photoanode was due to the formation of the Z -scheme heterojunction between CuBi 2 O 4 and BiOBr and the electron mobility of CS. This achieved the rapid separation and transfer of electron (e − )-hole (h + ) pairs and maintained the strong oxidation of holes in the valence band (VB) of BiOBr and the strong reduction of electrons in the conduction band (CB) of CuBi 2 O 4 . This research introduces a novel approach to design and establish excellent performance photoanode of PFC system.
研究领域:
环境科学
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材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 55
·期 10
·4265-4278
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IF 3.442
Hu Miao,Yan Aihua,Cui Qiaopeng,Huang Fei,Li Dengke,Li Fan,Huang Ji,Qiang Yinghuai
In this work, nickel sulfide (NiS)/bismuth oxybromide (BiOBr) hybrids were synthesized by a two-step hydrothermal method. Some advanced tools were employed to characterize the crystal phase, morphological evolution, light absorption and photocatalytic performance. Significantly, NiS/BiOBr hybrids exhibited enhanced photocatalytic activity toward rhodamine B (RhB) degradation under visible light irradiation. Comparatively, NS/BOB-3.0 showed the highest degradation rate, over 2.5 times higher than that of pure BiOBr. Furthermore, the retarded recombination rate of photogenerated carriers contributed to the improved photocatalytic performance. The results indicate that hybrids may be a promising method for enhancing the photocatalytic ability of BiOX-based semiconductor.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 21
·19137-19146
·
IF 2.195
Xiang Ye,Zou Hao,Xu Yifeng,Deng Yuehong,Zhu Jie,Wu Wan,Zhou Yi
In this article, the novel direct Z-scheme ZnIn 2 S 4 @BiOBr-(110) heterojunction structure was firstly synthesized via simple two-step hydrothermal method. The results of XRD and HRTEM indicated that as-prepared BiOBr mainly exposed high energy (110) facet. Simultaneously, the photoelectrochemical measurement was performed to further investigate the photo-induced carrier separation efficiency. The results indicated that Z-scheme heterojunction structure formed by the loading of ZnIn 2 S 4 nanosheets not only promoted the separation of photogenerated carriers and inhibited fast recombination rate of photogenerated electron–hole pairs of pure BiOBr, but also endowed the composite with better redox activity. The degradation efficiency of RhB by BiOBr loaded with 10 mol% ZnIn 2 S 4 has achieved 98% within 18 min under the irradiation of Xe lamp, which demonstrated that the unique direct Z-scheme ZnIn 2 S 4 @BiOBr-(110) composite photocatalytic materials has the potential application in environmental pollution control and energy conversion.
研究领域:
材料科学
·
环境科学
✓ 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）