SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Huan Xia,Hailan Qin,Yushan Zhang,Hang Yin,Qiang Li,Fei Pan,Dongsheng Xia,Dongya Li,Haiming Xu
Enhance the concentration of singlet oxygen ( 1 O 2 ) to ameliorate the photocatalytic performance is a promising strategy. Therefore, Z-scheme Mo 2 S 3 /BiOCl heterostructure with rational oxygen vacancies (OVs) was successfully synthesized by in-situ template method to tackle these issues. Characterization results reveal that the OVs were efficiently passivated by forming Mo–O bond at the interface of Mo 2 S 3 and BiOCl. Moreover, the photocatalytic mechanism research reflects that the interfacial electric field not only enhance the spatial separation and migration efficiency of the photo-induced carriers but also benefit producing abundant 1 O 2 , and thus TC-HCl was purified 90.8% in 90 min. Meanwhile, the contribution of the reactive oxygen species to the photocatalytic activity and the formation path of 1 O 2 were comprehensively studied for the first time. This work provides a new avenue to study the formation path of 1 O 2 and offer a polishing strategy to mend the photocatalytic activity by modulate the concentration of 1 O 2 .
研究领域:
材料科学
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环境科学
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光催化技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Hai Huang,Changchang Ma,Zhi Zhu,Xin Yao,Yang Liu,Zhi Liu,Chunxiang Li,Yongsheng Yan
A novel multidimensional heterojunction, the 1D trigonal Se nanorods (t-Se NRs) dissociated from CdSe QDs germinating on the 2D BiOCl ultrathin nanosheets, was successfully synthesized via a facile hybridization method. Such unique nanocomposite served as an efficient visible-light-driven photocatalyst for the photodegradation of the tetracycline hydrochloride (TC-HCl) solution. The obviously enhanced photocatalytic performance compared with pure BiOCl was mainly attributed to the introduction of Se NRs, which greatly enhanced the optical absorption in visible-light region and suppressed the recombination rate of electron-hole pairs by steering the charges migrating in a special manner. Specially, t-Se NRs in BiOCl system played an integral and important role as holes transfer channels, impelling more photogenerated electrons of BiOCl to participate in the photocatalytic process. Reactive species trapping experiments indicated the main reactive species were O 2 – radicals, which were generated by the collisions of excited electrons and molecular oxygen. Meanwhile, the radically increased ESR peak of O 2 – radicals for the heterogenous materials demonstrated successful release of abundant high-energy electrons. This work could be extended to the design of other robust 1D/2D heterojunction photocatalysts in application to the environmental demands.
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
Nanomaterials
·
2022
·Vol. 12
·期 14
·2423
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IF 5.719
Qian Zhang,Wuyang Nie,Tian Hou,Hao Shen,Qiang Li,Chongshang Guan,Libing Duan,Xiaoru Zhao
Crystal facet engineering and nonmetal doping are regarded as effective strategies for improving the separation of charge carriers and photocatalytic activity of semiconductor photocatalysts. In this paper, we developed a facial method for fabricating oxygen-deficient Br-doped BiOCl nanosheets with dominating {001} facets through a traditional hydrothermal reaction and explored the impact of the Br doping and specific facets on carrier separation and photocatalytic performance. The morphologies, structures, and optical and photocatalytic properties of the obtained products were characterized systematically. The BiOCl samples prepared by the hydrothermal reaction exhibited square-like shapes with dominating {001} facets. Photodeposition results indicated that photoinduced electrons preferred to transfer to {001} facets because of the strong internal static electric fields in BiOCl nanosheets with dominating {001} facets. Br doping not only contributed to the formation of impurity energy levels that could promote light absorption but introduced a large number of surface oxygen vacancies (VO) in BiOCl photocatalysts, which was beneficial for photocatalytic performance. Moreover, the photocatalytic activities of these products under visible light were tested by degradation of rhodamine B (RhB). Because of the synergistic effect of the dominating {001} facets, Br doping, and rich VO, oxygen-deficient Br-doped BiOCl nanosheets exhibited improved carrier separation, visible light absorption, and photocatalytic efficiency.Keywords:BiOCl nanosheets;Br doping;surface facet;oxygen vacancies;photocatalytic performance
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 THE ELECTROCHEMICAL SOCIETY
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2022
·Vol. 169
·期 5
·056520
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IF 4.386
Yarui An,Lin Song,Xiaoyan Chen,Chenming Ni,Kuanzheng Mao,Leijing Zhu,Yingying Gu,Yuqing Miao,Bin Song,Hongyun Ma
This work took advantage of 3D biomimetic hydrangea-like bismuth oxychloride (BiOCl) and PtNi nanocubes to fabricate a facile electrochemical immunosensor for the detection of CA19–9. Herein, APTES functionalized BiOCl (APTES-BiOCl) with large specific surface areas can provide eco-friendly microenvironment for biomolecules. The PtNi nanocubes prepared by the classic hydrothermal method have good conductivity, which can facilitate electron transfer highly efficient. Meanwhile, PtNi nanocubes can immobilize the anti-CA19–9 via covalent Pt-N bonds to anchor a great number of biomolecules more firmly. In addition, reduced graphene oxide (rGO) with excellent conductivity was implemented as a matrix, which greatly promoted electron transfer at the sensing interface. Under the optimal conditions, the proposed immunosensor can detect CA19–9 sensitively, from which a linear range of 0.01–150 U·ml–1 was derived accompanied with a low detection limit of 0.0034 U·ml–1. The results illustrated that the designed immunosensor exhibited excellent specificity, good reproducibility, and satisfactory stability. Moreover, it can be applied in the detection of real samples, which indicated that the immunosensor has great potential for early screening and diagnosis of diseases.
研究领域:
材料科学
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电化学
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生物传感器
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癌症诊断
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DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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2022
·Vol. 97
·期 5
·1280-1292
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IF 3.709
Zhiyang Zhang,Xinyan Xiao,Mingli Lu
BACKGROUND With the rapid development of industry and commerce, organic pollutants such as RhB are detrimental to human health and living environment. As a promising technology for treating the organic pollutants in wastewater, photocatalysis technology has received worldwide attention. For practical application, a novel photocatalyst with superior photocatalytic activity should be developed. RESULTS A novel Bi 4 O 5 Br 2 /BiOCl (BC2) heterojunction photocatalyst with 2D/2D structure was fabricated via a facile one-pot solvothermal method. Compared with pure Bi 4 O 5 Br 2 and BiOCl, the BC2 heterojunction exhibited enhanced photocatalytic performance which reached 91% photodegradation efficiency for RhB under 120 min irradiation of simulated solar-light at pH 7. And 99% RhB was degraded by BC2 under 60 min irradiation at pH 6. CONCLUSION According to experimental and characterization analytical results, the enhanced photocatalytic activity of Bi 4 O 5 Br 2 /BiOCl (BC2) heterojunction could be attributed to the following four points: (i) The BC2 heterojunction with excellent visible light response could effectively utilize the simulated solar-light. (ii) The more negative surface electronegativity of BC2 favored the adsorption of RhB during the photodegradation process. (iii) The 2D/2D BC2 heterojunction had large interface region and internal electric field, thus it displayed superior carriers transfer capability and enhanced charge separation efficiency. (iv) The carriers transfer mechanism of Z-scheme could hinder the recombination of photoinduced charge carriers and endow this photocatalyst with enough redox capacity to degrade RhB. Moreover, slightly acidic condition (pH 6) could promote degradation of RhB, due to the enhanced adsorption capacity of BC2 heterojunction. © 2022 Society of Chemical Industry (SCI).
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Zhou Song,Xuelin Dong,Nan Wang,Lihua Zhu,Zhihong Luo,Jindong Fang,Caihua Xiong
There remains a significant need for developing new photocatalytic system to degrade perfluorooctanoic acid (PFOA), a typical persistent organic pollutant. In this study, highly efficient BiOCl nanosheets were prepared by a simple hydrolytic method and employed to decompose PFOA. The UV irradiation BiOCl system decomposed nearly all the added PFOA after 12 h, yielding a defluorination of 59.3% and a minimization ratio of 52.5%. The photocatalytic defluorination rate constant of PFOA on BiOCl was 16.53 μmol L −1 h −1 , being 1.7 and 14.6 times higher than that on commercial In 2 O 3 and TiO 2 (P25), respectively. It was demonstrated the photocatalytic degradation of PFOA on BiOCl mainly followed the direct hole-induced oxidative pathway, and the PFOA degradation was positively correlated with the amount of oxygen vacancies in BiOCl. The oxygen vacancies not only acted as the electron scavengers to suppress the charge recombination, but also favored to bind PFOA tightly on the BiOCl surface through a special monodentate coordination, which is beneficial for the hole oxidation of PFOA.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
DALTON TRANSACTIONS
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2013
·Vol. 43
·期 2
·479-485
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IF 3.806
Yue Xu,Sichao Xu,Shuan Wang,Yunxia Zhang,Guanghai Li
Well-crystallized BiOCl nanoplates with exposed {001} facets were synthesized by a facile electrochemical anodic oxidation method. The thickness of the nanoplates decreases with increasing citric acid content in the electrolyte. The optical absorption edge of the BiOCl nanoplates shifts to a longer wavelength with citric acid. The BiOCl nanoplates obtained with citric acid show a high photocatalytic activity for degrading rhodamine B (RhB) as compared with that without citric acid. The photocatalytic activity of BiOCl nanoplates is higher in degrading RhB dyes than in degrading rhodamine 6G, methyl orange and methyl blue dyes. The superoxide radical and holes are the two major active species in photocatalytic degradation of RhB by BiOCl nanoplates. Citric acid can decrease the overlap in the layered structure of BiOCl and reduce the nanoplates thickness, leading to the increase in the exposure of {001} facets and the enhanced photocatalytic activity.
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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2022
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IF 3.428
Jianyin Zhang,Xiuxia Lu,Xiaoxiao Shi,Haohao Liu,Limin Zhang,Xingwei Shi
Using (BiO) 2 CO 3 as the raw material and a simple molten salt process followed by ball-milling, mass manufacturing of 2D layered BiOCl nanoplates and carbon composites can be produced. XRD, XPS, SEM, and TEM were used to characterize the as-synthesised materials in great detail. Eletrochemical experiments demonstrate that after 100 cycles at a current density of 100 mA g −1 , the discharge capacity of the BiOCl@C composite electrode remains at 410 mAh/g, and average coulombic efficiencies can remain as high as 99 % after the first cycle. This work would establish a novel method for producing high-volumetric-energy–density BiOCl@C anode materials, which are likely to be viable candidates for application in lithium-ion batteries.
研究领域:
材料科学
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电化学
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DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2022
·Vol. 29
·期 1
·e202202658
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IF 5.02
Maruf Ahmed,Ruihua Zhao,Tian Xing,Jianping Du
Graphical ZnO/BiOCl heterojunction material is fabricated by constructing netlike ZnO and BiOCl nanosheets. It exhibits high selectivity to ammonia and detection limit is 0.25 μM, which is suitable to detect volatile amines quantitatively. The synergetic effects of the heterojunction and netlike structures contribute to boosting electrochemical activity. The ZnO/BiOCl hybrid could be an promising candidate for detection and analysis. The electrochemical sensing is a potential method for detection of trace toxic substance. Herein, the heterojunction of netlike ZnO/BiOCl nanosheets was constructed for the enhanced electrochemical detection of ammonia. Cyclic voltammetry and linear sweep voltammetry were used to investigate the electrochemical performance. The results show that the ZnO/BiOCl-modified electrode exhibits higher sensitivity towards ammonia compared with the ZnO and BiOCl-based electrodes, which is ascribed to band structure and fast electron transfer. The high response of 11.8 μA mM −1 and a low detection limit (LOD) of 0.25 μM are achieved. In addition, the ZnO/BiOCl material exhibits high selectivity, repeatability and stability. The better linear relationship between concentration and current ( R 2 =0.99) is significant for quantitative detection of ammonia, implying that netlike ZnO/BiOCl nanosheets can serve as electrochemical sensing platform for detecting toxic substance. This research provides a strategy for fabricating two-dimensional netlike materials and regulating heterojunctions used for electrochemical application.
研究领域:
材料科学
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分析化学
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DOI
PubMed
高影响因子
Journal of Water Process Engineering
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2024
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IF 6.3
Dandi Cai,Yang Sun,Yuzhi Liu,Donglei Zou,Shuang Zhong
Singlet oxygen ( 1 O 2 ) exhibits superior effectiveness in degrading electron-rich organic pollutants. Herein, we propose a method to modulate 1 O 2 generation by solvothermal construction of bismuth oxychloride/zinc phthalocyanine (BiOCl/ZnPc) heterojunction system. This approach broadens the photoresponse range of BiOCl, strengthens the internal electric field (IEF) between the interfaces, and significantly enhanced the photocatalytic activity of the heterojunction system. The efficiency of the photocatalytic degradation process was evaluated using chlortetracycline hydrochloride (CTC) as a model emerging contaminant. The CTC removal rate using BiOCl/ZnPc (97.94 % in 120 min) was 1.33 times and 17.53 times those of BiOCl (73.47 % in 120 min) and ZnPc, respectively. Electron spin resonance and radical quenching tests revealed that singlet oxygen ( 1 O 2 ) and superoxide radicals (·O 2 − ) played a role in photocatalytic oxidation. The presence of 1 O 2 in the BiOCl/ZnPc heterojunction system enhanced the photocatalytic efficiency of the electron-rich organic compounds such as CTC. This study provides new ideas for heterojunction enhancement to strengthen the efficiency of charge transfer-enhanced generation of 1 O 2 and efficient degradation of electron-rich organic pollutants in water.
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
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 16
·2102522
·
IF 6.389
Li-Jiao Ma,Hui-Qin Wu,Bi-Yu Chen,Gang Wang,Bing-Xin Lei,Ding Zhang,Dai-Bin Kuang
0D-2D p–n type CsPbBr 3 /BiOCl heterojunction photocatalyst is successfully fabricated via the electrostatic self-assembly process. On the basis of the photoluminescence and photocurrent density results, the CsPbBr 3 /BiOCl composite exhibits a higher charge separation rate than pure BiOCl and CsPbBr 3 . The degradation of Rhodamine B (RhB) result shows that the CsPbBr 3 /BiOCl composite obtains the highest degradation rate of close to 100% within 60 min, which is significantly higher than those of pure CsPbBr 3 (84.21%) and BiOCl (73.57%) because the p–n type heterojunction photocatalyst can promote the separation of photogenerated charge carriers. The free radical capture experiment demonstrates that •O 2 − plays a major role in the photodegradation of RhB. This study may provide insights into designing advanced photocatalysts for the clean-ups of environmental pollutants.
研究领域:
材料科学
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环境科学
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光催化
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产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2024
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IF 4.3
Yueyi Li,Yuehui Liu,Xuguang Liu,Xia Li
In this study, rGO/Bi 2 O 2 CO 3 /BiOCl composite photocatalysts were prepared using a one-step solvothermal method . The formation and morphology of these photocatalysts were characterized through XRD , Raman, XPS , SEM , TEM, and other techniques. The efficiency of the composite photocatalysts was assessed by decreasing RhB under visible light . Among them, the photocatalytic activity of 4 wt% rGO/Bi 2 O 2 CO 3 /BiOCl was discovered to be the best, with a degradation rate as high as 96 % within 60 min. This is because the inclusion of rGO not only increased the specific surface area of the ternary materials, but also acted as a carrier for electrons transfer . Besides, the heterojunction structure constituted between Bi 2 O 2 CO 3 and BiOCl also opens up a new pathway for carrier separation. Finally, we explored the degradation mechanism of rGO/Bi 2 O 2 CO 3 /BiOCl ternary materials in detail. This study holds an important reference for the synthesis of bismuth-based composite photocatalysts and has potential applications in wastewater treatment .
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
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