Catalysts
·
2019
·Vol. 9
·期 10
·795
·
IF 3.444
Yuxiang Yan,Hua Yang,Zao Yi,Tao Xian
In this work, we have synthesized BiOCl nanoplates (diameter 140–220 nm, thickness 60–70 nm) via a co-precipitation method, and then created Bi nanoparticles (diameter 35–50 nm) on the surface of BiOCl nanoplates via a NaBH4reduction method. By varying the NaBH4concentration and reaction time, the evolution of Bi nanoparticles was systematically investigated. It is demonstrated that with increasing the NaBH4concentration (at a fixing reaction time of 30 min), BiOCl crystals are gradually reduced into Bi nanoparticles, and pure Bi nanoparticles are formed at 120 mM NaBH4solution treatment. At low-concentration NaBH4solutions (e.g., 10 and 30 mM), with increasing the reaction time, BiOCl crystals are partially reduced into Bi nanoparticles, and then the Bi nanoparticles return to form BiOCl crystals. At high-concentration NaBH4solutions (e.g., 120 mM), BiOCl crystals are reduced to Bi nanoparticles completely with a short reaction time, and further prolong the treatment time leads to the transformation of the Bi nanoparticles into a two-phase mixture of BiOCl and Bi2O3nanowires. The photodegradation performances of the samples were investigated by choosing rhodamine B (RhB) as the model pollutant and using simulated sunlight as the light source. It is demonstrated that an enhanced photodegradation performance can be achieved for the created Bi@BiOCl hybrid composites with appropriate NaBH4treatment. The underlying photocatalytic mechanism was systematically investigated and discussed.Keywords:BiOCl nanoplates;Bi nanoparticles;NaBH4reduction;Bi@BiOCl hybrids;photodegradation 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
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 6
·5740-5745
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IF 1.338
Deng Jiangming,Mo Yunfei,Liu Jianghui,Guo Rui,Zhang Yi,Xue Wei,Zhang Yuanming
Inorganic nanoparticles have been widely used in biomedical field. In this paper, we try to study the use of three types of inorganic nanoparticles (i.e., SnS2, BiOCl and SnS2-incorporated BiOCl (SnS2/BiOCl)) as doxorubicin (DOX) carriers. Firstly, SnS2,
BiOCl and SnS2/BiOCl were synthesised, then were characterized by TEM, nanoparticles size and zeta potential. Next the drug release and cell viability test were carried out. The cell viability test indicated that the drug carriers can effectively kill HeLa cells while maintaining
low cytotoxicity against normal cells-fibroblasts. The results show the potential of SnS2/BiOCl nanoparticles for antitumor applications.
研究领域:
生物医学
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药物递送
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肿瘤学
✓ 已验证
DOI
PubMed
高影响因子
Chemistry-Switzerland
·
2022
·Vol. 4
·期 3
·765-775
·
IF 0
Yi Zheng,Siqi Wang,Min Shu,Yi Wang,Dumeng Cao
Enhancing photocarrier separation is a key step of photocatalysis, and in situ constructed composition interface is an advanced method to achieve this aim. Therefore, we report a face-to-face Bi2WO6/BiOCl (BWOC) which was synthesized via the continuous in situ ion-exchange method. As UV light is harmful to the human body, BWOC exhibits excellent photocatalytic activity only in visible light, and this is an important feature because visible light is a human-friendly operating condition. Under 50 W visible LED lamp illumination, unexcited BiOCl (BOC) only extracts electrons of excited Bi2WO6(BWO), and holes remain on BWO, resulting in excellent photocarrier spatial separation efficiency through the face-to-face interface. This is why BWOC can be safe to use for the removal of hazardous substances. Compared with BWO and BOC, BWOC possesses 2.6 and 5.6 times higher photodegradation activity than RhB. This work provides a novel insight of efficient visible light photocatalytic system for environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
Nanomaterials
·
2023
·Vol. 13
·期 17
·2408
·
IF 5.3
Shijie Wang,Dongxue Song,Lijun Liao,Bo Wang,Zhenzi Li,Mingxia Li,Wei Zhou
Doping engineering of metallic elements is of significant importance in photocatalysis, especially in the transition element range where metals possess empty ‘d’ orbitals that readily absorb electrons and increase carrier concentration. The doping of Mn ions produces dipole interactions that change the local structure of BiOCl, thus increasing the specific surface area of BiOCl and the number of mesoporous distributions, and providing a broader platform and richer surface active sites for catalytic reactions. The combination of Mn doping and metal Bi reduces the forbidden bandwidth of BiOCl, thereby increasing the absorption in the light region and strengthening the photocatalytic ability of BiOCl. The degradation of norfloxacin by Bi/Mn-doped BiOCl can reach 86.5% within 10 min. The synergistic effect of Mn doping and Bi metal can change the internal energy level and increase light absorption simultaneously. The photocatalytic system created by such a dual-technology combination has promising applications in environmental remediation.Keywords:photocatalysis;BiOCl;manganese doping;self-assembly
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wei Chen,Yiran Liang,Zhili Chen,Yunxiang Zhang,Jian Wang,Xin Chen,Chenliang Zhou,Keshun Nie,Zhongjie Wang,Qinfang Zhang
Designing of an efficient heterojunction for the practical application of photocatalysis has been considered as the promising topic for the settle of the energy crisis and environmental pollution. Herein, a dual Bi 2 O 3 /BiOCl/Bi 24 O 31 Cl 10 ternary heterojunction has been constructed by the in-situ photoreduction technique for the photocatalytic degradation of rhodamine B (RhB) and tetracycline hydrochloride (TCH). The significant difference in the work function ( W f ) among Bi 2 O 3 , BiOCl, and Bi 24 O 31 Cl 10 leads to the formation of the space charge region (built-in electric field) around the heterojunction interface along with band bending, which facilitates the directional migration and spatial separation of photogenerated carriers and offers the strong redox capacity of photogenerated electrons and holes. This process is beneficial for the generation of active species of superoxide free radical ( ∙ O 2 − ) and the photo-generated hole (h + ). The optimized removal efficiencies of RhB and TCH for the ternary heterojunction were nearly 7.19 and 1.28 times higher than these for the pure Bi 24 O 31 Cl 10 , respectively. Furthermore, the involved vital reactive radicals, potential degradation pathway, and the eco-toxicity of intermediates over Bi 2 O 3 /BiOCl/Bi 24 O 31 Cl 10 are evaluated through the trapping experiment, LC-MS calculation, and toxicity analysis. This work demonstrates a new heterojunction photocatalyst for the elucidation of pollutant degradation mechanism.
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
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Xiaoya Gao,Guangbei Tang,Wen Peng,Qian Guo,Yongming Luo
Phosphate modification is a general strategy for improving the photocatalytic activities of semiconductors. Ion exchange can be occurred during the phosphate modification process. This would give a surprise for a new phase formed on the surface of the parent photocatalyst. More importantly, this is conductive to form close contact and continuous interface favoring the charge transfer between two phases. Here, a novel BiOCl-OV-BiPO 4 photocatalyst was fabricated using a facile in situ phosphate modification method. BiOCl-OV-BiPO 4 displayed a maximum carbamazepine (CBZ) degradation efficiency of 81.70% after 30 min Xe lamp irradiation, with a reaction kinetics rate constant ( k ) of 5.75 times higher than ordinary BiOCl samples. Oxygen vacancy (OV) is important for the construction of Z-scheme BiOCl-OV-BiPO 4 : OV benefits the generation of BiPO 4 on the surface of BiOCl; furthermore, OV acting as electron mediator, promotes the separation of photogenerated charge carriers between BiOCl and BiPO 4. Based on the results from PL tests, photocurrent density, EIS Nyquist plots, and cyclic voltammetry, it can be demonstrated that Z-scheme structure of BiOCl-OV-BiPO 4 not only increases the photogenerated electrons-holes separation rate but also retains their strong redox ability. This significantly facilitates the production of superoxide radical (O 2 − ) and holes ( h + ), which dominates the CBZ photodegradation. This work provides a new sight for the fabrication of Z-scheme photocatalysts to improve the photocatalytic performance.
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
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2016
·Vol. 6
·期 10
·7772-7779
·
IF 3.289
Huiping Zhao,Yafang Zhang,Guangfang Li,Fan Tian,Han Tang,Rong Chen
Loose-packed flower-like BiOCl hierarchical nanostructures (HNs) assembled by thin nanosheets were successfully synthesized via a facile solvothermal method. Based on the matchability analysis of band structure of BiOCl and the molecular orbitals of the dyes, the RhB dye-sensitized heterogeneous BiOCl HNs system was established for MO degradation under visible light irradiation. The mechanism of MO degradation over RhB-sensitized BiOCl was also discussed according to the photocurrent and photoluminescence results. It was found that MO degradation efficiency over RhB-sensitized BiOCl HNs was obviously improved due to the generation of superoxide radicals (˙O2−) through the reduction of surface-adsorbed O2 molecules by the injected electrons on the conduction band of BiOCl HNs from the excited RhB molecules. This work may provide insight on better understanding the organic dye photodegradation process in RhB dye-sensitized BiOCl heterogeneous systems and explore a dye-sensitized semiconductor photocatalyst strategy for environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 18
·23189-23205
·
IF 2.478
Chen Piao,Zhang Zhi,Yang Shuijin,Yang Yun,Sun Yong
In this study, a novel oxygen vacancy-rich BiOCl/ZnMoO 4 composites were successfully prepared by a simple two-step method. Experimental results indicated that the content of BiOCl with oxygen vacancies played an important role in photocatalytic performance of OBZM heterostructures. OBZM-5 exhibited a highly enhanced photocatalytic activity under visible light irradiation compared to pure BiOCl, Ov-BiOCl, ZnMoO 4 and other OBZM composites, which can be attributed to the efficient separation and transfer of photogenerated charge carrier. The photocatalytic degradation efficiency of rhodamine B (RhB) can reach 99% within 40 min and almost all of norfloxacin (NOR) can be degradated after 100 min by OBZM-5. In addition, OBZM-5 displayed a good stability during the photocatalytic process, which favored a long-term use. Moreover, a possible photocatalytic mechanism was proposed based on the active species trapping experiments and electron spin resonance (ESR) tests, verifying that the photogenerated holes (h + ) and · O 2 − radicals were the dominating active species.
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
ENVIRONMENTAL RESEARCH
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2023
·
IF 8.3
Xiaofan Yang,Yutao Xu,Saraschandra Naraginti,Xueyu Wei
The emerging contaminants removal from the environment has recently been raised concerns due to their presence in higher concentrations. Over usage of emerging contaminant such as sulfamethazine poses serious threat to the aquatic and human health as well. This study deals with rationally structured a novel BiOCl (110)/NrGO/BiVO 4 heterojunction which is used to detoxify sulfamethazine (SMZ) antibiotic efficiently. The synthesised composite was well characterized and the morphological analysis evidenced the formation of heterojunction consisted of nanoplates BiOCl with dominant exposed (110) facets and leaf like BiVO 4 on NrGO layers. Further results revealed that the addition of BiVO 4 and NrGO tremendously increased the photocatalytic degradation efficiency of BiOCl with the rate of 96.9% (k = 0.01783 min −1 ) towards SMZ within 60 min of visible light irradiation. Furthermore, heterojunction energy-band theory was employed to determine the degradation mechanism of SMX in this study. The larger surface area of BiOCl and NrGO layers are believed to be the reason for higher activity which facilitates the excellent charge transfer and improved light absorption . In addition, SMZ degradation products identification was carried out by LC-ESI/MS/MS to determine the pathway of degradation. The toxicity assessment was studied using E. coli as a model microorganism through colony forming unit assay (CFU), and the results indicated a significant reduction in biotoxicity was observed in 60 min of degradation process. Thus, our work gives new methods in developing various materials that effectively treat emerging contaminants from the aqueous environment.
研究领域:
环境科学
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材料科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 8
·e202405123
·
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2016
·
IF 3.299
Meichao Gao,Dafeng Zhang,Xipeng Pu,Hong Li,Wenzhi Li,Xin Shao,Dongdong Lv,Bingbing Zhang,Jianmin Dou
Fe-doped BiOCl photocatalysts were synthesized by a simple combustion method. The as-synthesized catalysts were characterized by X-ray diffraction, scanning electron microscope, transmission electron microscope, X-ray photoelectron spectroscopy and UV–Vis diffuse reflectance spectroscopy. Fe 3+ doping leads to red-shift in the absorption band and increased visible light absorption. The photocatalytic reaction tests in the degradation of the dyes of rhodamine showed that the doping of Fe 3+ could bring about a big increase in the photocatalytic activity under visible light irradiation. The main reactive oxygen species and photocatalytic mechanism of Fe-doped BiOCl under visible light irradiation were discussed in detail.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Mingming Du,Anxian Peng,Hongyue Liu,Huimei Chen,Qiyun Li,Zheng Fang,Ganning Zeng,Rongjun Yan
The well-designed internal electric field (IEF) with band bending effects will effectively accelerate the separation and transfer of photogenerated charges to foster a photocatalytic performance. Hence, in this work, the IEF-induced BiOCl/TiO2 p-n heterojunctions are prepared through the hydrothermal method for photocatalytic H2O2 production. The BiOCl/2TiO2 composite performed a superior H2O2 yield of 4.75 mM h–1, which is 4 times higher than that of pristine BiOCl. The p-n heterojunction mechanism was investigated via XPS and photoelectrochemical property tests, in which BiOCl/2TiO2 showed the highest photogenerated charge separation efficiency for boosting photocatalytic activity. This work provided an effective strategy for the design of p-n heterojunction photocatalysts to enhance photocatalytic performance.
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
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