JOURNAL OF ALLOYS AND COMPOUNDS
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2024
·
IF 5.8
Tian Tian,Dingze Lu,Bang Zhao,Kiran Kumar Kondamareddy,Wenju Gu,Jingxuan Yang,Hongjuan Hao,Huiqing Fan,Wingkei Ho
It is crucial to elucidate the intrinsic relationship between defects in g-C 3 N 4 (pristine graphitic carbon nitride, here onwards bare carbon nitride-BCN) and the enhancement of photogenerated carrier dynamics and photocatalytic performance. Three types of defective g-C 3 N 4 are prepared by defect engineering, called CVCN (carbon vacancies containing carbon nitride), NVCN (nitrogen vacancies containing carbon nitride), and OBCN (oxygen doped bulk carbon nitride). Various characterization techniques are employed to examine the materials' crystalline structure, chemical bonds, surface area, pore properties, light response, carrier recombination, vacancy/doping types, and carrier mobility. Ab initio calculations via VASP further elucidated band structure and charge distribution. Visible light-assisted Rhodamine B (RhB) degradation and hydrogen peroxide production experiments revealed that defect engineering significantly enhanced the photocatalytic degradation capacity of g-C 3 N 4 , with OBCN showing the highest RhB degradation rate which is 6.26 times higher than that of BCN (bulk carbon nitride), but suffering from photo-corrosion and its main reactive substances are h + and ·O 2 - ; while NVCN exhibited the best hydrogen peroxide production capacity which is 1.83 times higher than that of BCN, the main active species is ·O 2 - . Through the Vienna Ab initio Simulation Package software (VASP), the projection enhanced wave method is used to model and analyze the first principles calculation of the band structure of the samples and the change of elemental differential charge. The occurrence of defects slightly modulated the energy band structure of the photocatalyst, significantly inhibited the recombination phenomenon of photogenerated carriers, promoted the separation of photogenerated carriers, and ultimately improved the photocatalytic activity.
研究领域:
材料科学
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光催化
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理论计算
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DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 50
·32480-32487
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IF 4.036
Jingzhe Li,Yue Chen,Liezhen Zhu,Linfa Liao,Xinmao Wang,Xun Xu,Lingfang Qiu,Jiangbo Xi,Ping Li,Shuwang Duo
In this study, a novel g-C3N4-based ternary heterojunction was rationally designed and constructed by the in situ growth of ZnIn2S4 nanosheets and CdS nanoparticles onto the g-C3N4 nanosheets using a facile two-step oil-bath method. Through optimizing the proportion of ZnIn2S4 and CdS component, g-C3N4 nanosheets coupled with ZnIn2S4 nanosheets and CdS nanoparticles (denoted as CdS/ZnIn2S4/g-C3N4) exhibited obviously higher photocatalytic properties for RhB removal than the single-component and dual-component systems. Among the as-obtained ternary photocatalysts, it was found that the ternary CdS/ZnIn2S4/g-C3N4-0.2 photocatalyst displayed the optimum photocatalytic property (96%) within a short time (30 min), which was almost 27.42 and 1.17 times higher than that of pure g-C3N4 and binary ZnIn2S4/g-C3N4-0.7 composite. The excellent activity of the ternary CdS/ZnIn2S4/g-C3N4 heterostructure is assigned to the synergetic effects of CdS nanoparticles, ZnIn2S4 nanosheets and g-C3N4 nanosheets, which not only broaden the visible-light absorption range, but also improve the charge mobility and separation rate, thus boosting the visible-light-driven photocatalytic property of g-C3N4.
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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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2026
·
IF 5.9
Qin Shi,Chunyan Lu,Huxin Xie,Chenxu Liu,Xian Xia,Min Xu,Qingjun Xue,Chunxia Mu,Chuanqi Zhao,Honghui Pan,Xixiang Liu,Yan Wang
The long-term stability and reuse potential of the photocatalyst are of great concern for the degradation of organic pollutants in wastewater. A recycled photocatalyst with high reusability was synthesized by immobilizing BiVO 4 nanoparticles on alumina foam ceramic (BiVO@AFC) via a convenient dip-coating followed by calcination method. BiVO@AFC show stable photocatalytic activity for Rhodamine B (RhB) degradation over 90 cycles of experiments (180 h), requiring only 4 times of regeneration treatments. The regeneration is simple and economical, washing the photocatalyst with ultrapure water and dried it at 55 °C. Each regeneration could restore the RhB degradation rate to above 85%. Characterizations confirmed the stability of the materials in optical absorption and chemical properties. The dual doping of W and Mo within BiVO 4 (3 W-2Mo,BiVO@AFC) exhibits a synergistic effect, significantly enhancing photocatalytic performance and stability. The co-doping also can suppress the loss in specific surface area and pore volume of BiVO@AFC originated from the normal wear and tear during the photocatalytic process. As a result of that, the RhB degradation rate of 3 W-2Mo:BiVO@AFC remained above 80% over 90 cycles of experiments (180 h) requiring 4 times of regeneration. And the RhB degradation rate can be restored to above 94% by the same regeneration with BiVO@AFC. Photogenerated hole (h + ) plays a major role in removing RhB in this case. While the dual doping of W and Mo is in favour of generating more ·OH and ·O₂ − radicals for degradation by promoting photocharges transfer and separation. These make it a promising candidate for large-scale applications for wastewater treatment.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 2
·2061-2074
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IF 2.478
Wang Xule,Song Jimei,Lu Yun,Zhu Wanrong,Hu Gang
In this work, a series of Z-scheme Ag/Ag 2 WO 4 /g-C 3 N 4 (AAC) photocatalysts were successfully constructed by the deposition–precipitation method at room temperature. The phase, structure, morphology and optical property of the as-prepared photocatalysts were well characterized. Interestingly, all AAC exhibited prominent photocatalytic activity for Rhodamine B (RhB) degradation under visible light illumination. Especially, AAC-3 possessed the higher RhB degradation rate ( k = 0.1855 min −1 ). More remarkably, when H 2 O 2 (1 mL 0.0977 mol/L) was dissolved into reaction system, the degradation rate of RhB was further improved ( k = 0.7899 min −1 ), which could be mainly attributed to the high separation rate of photogenic carriers and more active species. Meanwhile, a feasible photocatalytic reaction mechanism was proposed and discussed in detail.
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
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Jing Tian,Yanguang Zhang,Feng Qian,Meijing Cao,Yuanhang Cheng,Jiarun Li,Minge Tian,Weibing Li,Lei Wang
The low recovery efficiency and secondary pollution of traditional powder photocatalysts are the main problems restricting the practical application of photocatalysis technology. Therefore, PAN/BiInOCl membrane photocatalysts were prepared by simple electrospinning technology, and the swash plate photocatalytic reactor was designed according to the utilization characteristics of the membrane photocatalyst. By cooperating membrane photocatalyst with the swash plate photocatalytic reactor, the rapid and effective photocatalytic degradation of RhB simulated wastewater by PAN/BiInOCl membrane photocatalyst can be achieved, and the rapid and non-destructive recovery of photocatalysts can be realized. PAN/BiInOCl-3 membrane photocatalyst with the best photocatalytic degradation efficiency can realize the complete degradation of RhB within 30 min and has good stability under the actual sunlight irradiation. Radical trapping experiments confirmed that hydroxyl radicals and holes play a major role in the photocatalytic degradation of RhB. The preparation of PAN/BiInOCl membrane photocatalyst and the design of swash plate photocatalytic reactor lay a theoretical foundation for the design and preparation of efficient membrane photocatalyst and the application of photocatalytic technology in wastewater treatment.
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
Materials
·
2019
·Vol. 12
·期 23
·3948
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IF 2.972
Lingfang Qiu,Zhiwei Zhou,Mengfan Ma,Ping Li,Jinyong Lu,Yingying Hou,Xiangshu Chen,Shuwang Duo
Novel visible-light responded aluminosilicophosphate-5 (SAPO-5)/g-C3N4composite has been easily constructed by thermal polymerization for the mixture of SAPO-5, NH4Cl, and dicyandiamide. The photocatalytic activity of SAPO-5/g-C3N4is evaluated by degrading RhB (30 mg/L) under visible light illumination (λ > 420 nm). The effects of SAPO-5 incorporation proportion and initial RhB concentration on the photocatalytic performance have been discussed in detail. The optimized SAPO-5/g-C3N4composite shows promising degradation efficiency which is 40.6% higher than that of pure g-C3N4. The degradation rate improves from 0.007 min−1to 0.022 min−1, which is a comparable photocatalytic performance compared with other g-C3N4-based heterojunctions for dye degradation. The migration of photo-induced electrons from g-C3N4to the Al site of SAPO-5 should promote the photo-induced electron-hole pairs separation rate of g-C3N4efficiently. Furthermore, the redox reactions for RhB degradation occur on the photo-induced holes in the g-C3N4and Al sites in SAPO-5, respectively. This achievement not only improves the photocatalytic activity of g-C3N4efficiently, but also broadens the application of SAPOs in the photocatalytic field.Keywords:g-C3N4;SAPO-5;composite;photocatalytic;visible light
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
PubMed
高影响因子
Analytical Methods
·
2019
·Vol. 11
·期 22
·2868-2874
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IF 2.378
Lifei Ji,Xian Zhou,Jian Zhang,Xin Zhang,Weidong Kang,Fengchun Yang
Organic dye detection requires high sensitivity, low-cost equipment, simplified procedures, and real-time capabilities; thus, electrochemical methods are gradually emerging in this field instead of chromatography. However, much attention has been paid to toxic and complex metal or noble-metal hybrid materials for constructing electrochemical sensors, which is extremely limiting for practical applications. In this study, a metal-free electrocatalyst, MWNTs with carboxylic groups (MWNTs–COOH), was prepared through surface oxidation in a piranha solution and a simple hydrothermal treatment. The obtained MWNTs–COOH possessed superior hydrophilicity, increased conductivity and substantial active carbon or carboxylic group sites, as determined by characterization using Raman spectroscopy, contact angle measurements, electrochemical surface area analysis, and X-ray photoelectron spectroscopy. The above advantages enabled MWNTs–COOH to exhibit excellent electrochemical activities, with a satisfactory utilization for determining trace Rhodamine B (RhB), showing a lower calculated detection limitation of 2.66 nM and a wider linear range from 0.05 to 850 μM with outstanding specificity and reproducibility. Furthermore, it was found that the carboxyl group on the MWNTs would probably have triggered the electron redistribution and exposed more adjacent active carbon sites, which facilitate the electrocatalytic function to CN on the RhB directly.
研究领域:
分析化学
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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 PAPERS
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2018
·Vol. 72
·期 6
·1417-1426
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IF 0.963
Zhang Fuqing,He Yihui,Li Weixin,Zhao Lei,Chen Hui,He Xuan,Guo Jia
The fabrication of low-cost and environmentally friendly photocatalysts with superior photodegradation efficiency remains one of the most pressing challenges in present research. Herein, we elaborately designed and synthesized a promising N-doped carbon quantum dots/CeO 2 hollow microsphere (NCQDs/h-CeO 2 ) photocatalyst with superior photoresponse property and photoactivity in visible light. The removal efficiencies of rhodamine B (RhB) under visible light illumination for NCQDs/h-CeO 2 exhibits a 30.3% enhancement compared with pure h-CeO 2 . The results of EIS and PL imply that the excellent performance may be attributed to the strong synergistic effect between NCQDs and h-CeO 2, thus effectively promoting charge transfer and restraining the recombination of photogenerated holes and electrons. Accordingly, a synergistic photocatalysis mechanism was proposed to explain the photocatalytic reaction process. Besides, the NCQDs/h-CeO 2 exhibits better cycle stability than common CQDs/h-CeO 2 after a four-cycle photocatalytic test. Therefore, the NCQDs/h-CeO 2 may represent a promising strategy for the current water pollution issues.
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
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2022
·
IF 9.136
Yucheng Li,Xiangyu Wang,Zhengyin Duan,Dehai Yu,Qiang Wang,Dandan Ji,Wenxia Liu
Treating dye-contaminated wastewater using the visible light–driven photo-Fenton reaction is beneficial to environmental remediation. This paper reports the synthesis of a novel, highly effective photo-Fenton catalyst, the Zn/Co-ZIFs@MIL-101(Fe) composite, by a facile internal-growth method. The composite, which had an MOF-in-MOF structure, activated H 2 O 2 to decompose RhB, a polluting-dye model, under visible-light illumination. The transfer of the electron–hole pair was synergistically accelerated by the reaction centers of the composite (the MIL-101(Fe) shell and Zn/Co-ZIFs core), which enhanced H 2 O 2 activation. The generated OH, O 2 − , and 1 O 2 effectively decomposed RhB. The composite’s catalytic performance was significantly enhanced by the electronic hybridization of its Fe 3+ , Co 2+ , and Zn 2+ metal centers. Thus, the composite demonstrated a remarkable capability to remove RhB. The composite polymetallic MOFs loaded with 3% Zn/Co-ZIFs prepared by us showed good reusability and water stability, and their morphology and structure did not change significantly after four runs, depending on the iron, cobalt, and zinc metal leaching concentrations 0.134 mg/L, 0.06 mg/L and 0.054 mg/L respectively. This study provides a novel method to construct an Zn/Co-ZIFs@MIL-101(Fe) catalyst with dual reaction centers that enhance the transfer of electron–hole pairs. Our findings inspire the application of MOF-based photo-Fenton catalysts to wastewater treatment and environmental remediation.
研究领域:
环境科学
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催化
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材料科学
·
水处理
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yiying Yue,Kaiyang Hou,Jiayue Chen,Wanli Cheng,Qinglin Wu,Jingquan Han,Jianchun Jiang
A nanofiltration (NF) membrane containing a NaOH-treated electrospun polyacrylonitrile (HPAN) substrate, an interfacial polymerization (IP) polyamide (PA) layer, a chitosan (CS) coating layer, and an Ag/AgBr/AgVO3 photocatalyst loading layer was prepared. The structural evolution of the membranes was investigated, and their performance was estimated in accordance with the water flux and rejection rate. A probable mechanism for the photocatalytic activity of Ag/AgBr/AgVO3 was proposed. The loading of the Ag/AgBr/AgVO3 heterojunction on the HPAN/PA/CS NF membrane endowed the membrane with excellent self-cleaning properties owing to the photolytic degradation of the dye. The filtration and degradation processes of the Ag/AgBr/AgVO3-loaded membrane constantly promoted each other, and the treatment efficiency achieved with the integrated (filtration + degradation) process was superior to those obtained with the filtration and degradation processes alone. The Ag/AgBr/AgVO3-NF membrane exhibited excellent recyclability and stability when subjected to five integrated filtration–degradation processes. In addition, the Ag/AgBr/AgVO3-NF membrane exhibited an elastic modulus of 65.75 MPa and a toughness of 38.9 kJ/m3 along with a good disinfection effect on Escherichia coli in visible light. The as-prepared photocatalyst-loaded NF membrane with excellent antifouling performance, antimicrobial activity, high strength, and recyclability showed potential for continuous water purification operation.
研究领域:
材料科学
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环境科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Sixin Wang,Xiaoli Dong,Nan Zheng,Yu Wang,Jiefeng Gao
Constructing photocatalyst with high visible light utilization efficiency and easy recyclability is still challenging in view of practical applications. Herein, we constructed a novel Cd 0.8 Zn 0.2 S/SnO 2 heterojunction on flexible PAN nanofiber substrates via a simple solvothermal route as a flexible and easily recycled photocatalyst. This newly developed PAN/Cd 0.8 Zn 0.2 S/SnO 2 nanofibrous mat had excellent photocatalytic activity towards Rhodamine B (RhB) under visible light driving, and RhB could be degraded 98 % after 120 min. The efficient photocarrier separation endowed by Cd 0.8 Zn 0.2 S/SnO 2 heterojunction plays a significant role in improving photocatalytic property. Meanwhile, the obtained PAN/Cd 0.8 Zn 0.2 S/SnO 2 nanofibrous mat had good structural stability and cycling performance. More importantly, relative to the traditional suspended nanoparticles , the film-like PAN/Cd 0.8 Zn 0.2 S/SnO 2 exhibit outstanding flexibility and self-supporting characters, allowing them to be effortlessly separated and removed from service environment. This work provides an excellent strategy for designing flexible and recyclable nanofiber based photocatalysts with high photocatalytic activity , which is expected to have broad application prospects in the field of water treatment.
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
Catalysis Science & Technology
·
2019
·Vol. 9
·期 9
·2103-2110
·
IF 5.726
Shuhui Liang,Yukun Chang,Yue Wang,Dafeng Zhang,Xipeng Pu
A simple combustion method was reported to prepare a novel BiOBr:Yb3+,Er3+/AgBr (BYE/AgBr) heterojunction photocatalyst. Phase composition, morphology and optical properties of samples were characterized. The diffuse reflectance and photoluminescence spectra showed that the as-synthesized BYE/AgBr can be activated under both visible (vis) and near-infrared (NIR) light. Notably, BYE/AgBr composites exhibited enhanced photocatalytic activity for RhB degradation under vis/NIR irradiation. The degradation rate constants of BYE/AgBr-1 : 1.5 for RhB were 0.0220 min−1 and 0.01368 h−1 under visible and NIR irradiation, which are about 2.6 and 4.9 times higher than that of pure BYE, respectively. The upconversion effect of Er3+ can convert the NIR light (∼980 nm) to visible light which was then absorbed by BYE/AgBr to generate e− and h+. Moreover, the formation of the heterojunction also plays a role in the enhanced vis/NIR photocatalytic abilities; and a corresponding plausible photocatalytic mechanism was proposed.
研究领域:
材料科学
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光催化
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环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）