APPLIED SURFACE SCIENCE
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2021
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IF 6.707
Huijun Yu,Shasha Xu,Shijie Zhang,Shuguang Wang,Zuoli He
g-C 3 N 4 based heterojunction photocatalysts attract much attention as degradation materials for organic pollutants due to their wide light absorption range and rich photoinduced carriers. Strategies to effectively improve photoelectron separation and transmission have become a research hotspot. Herein, a novel heterojunction TiB 2 -TiO 2 @g-C 3 N 4 photocatalyst with core–shell structure was constructed by in-situ growth of g-C 3 N 4 on the TiB 2 -TiO 2 cores using one-step calcination method. The composite processes a higher photodegradation performance of Rhodamine B (RhB) and 4-Chlorophenol (4-CP) compared to the pure g-C 3 N 4 . The results show that the surface of TiB 2 -TiO 2 cores contains numerous ‘TiB 2 bridges’, as photoinduced carriers transport channels, which effectively accelerate photoinduced e - and h + migration. In addition, the g-C 3 N 4 coated on TiB 2 -TiO 2 cores forms a Z-scheme heterojunction, which hinders the recombination of photogenerated charges resulting in a longer electron lifetime. Furthermore, the TiB 2 also could act as acceptors of electrons for the formation of •O 2– . The main active substances for degradation of RhB are •OH, •O 2– and h + . This strategy is applicable to design highly capable heterojunction photocatalysts by constructing fast electronic transmission channels.
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 SURFACE SCIENCE
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2013
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IF 2.112
Yongqian Lei,Guanhua Wang,Pengran Guo,Huacan Song
A series of Ag-loaded photocatalysts of Ag–BiOBr x I 1− x have been synthesized by a solution method and characterized by variety methods. The degradation of rhodamine B (RhB) showed that these samples exhibited excellent and composition-dependent performance in the visible light region. The Ag–BiOBr 0.75 I 0.25 composite photocatalyst shows the highest photocatalytic activity in the degradation of RhB and 4-CP pollution. The load of metal Ag has remarkably improved the photocatalytic activity. The significant enhancement in the Ag–BiOXs photoactivity could be both the effect of Ag deposits as electron traps and the surface plasma resonance absorption effect of Ag. A possible mechanism of enhanced activity of Ag–BiOXs was proposed based on the analysis of the band gap structure.
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
POLYMERS FOR ADVANCED TECHNOLOGIES
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2018
·Vol. 30
·期 1
·101-109
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IF 2.137
Zongxue Yu,Xia Min,Fei Li,Di Yin,Yixing Peng,Guangyong Zeng
In this study, a novel dopamine modified graphene-based photocatalytic membrane with Bi 12 O 17 Cl 2 inserted was fabricated to modify the commercial cellulose acetate membrane via vacuum filtration method. Results showed the reduced graphene oxide (RGO)/poly(dopamine) (PDA)/Bi 12 O 17 Cl 2 -CA photocatalytic composite membrane exhibited 98% removal efficiency for methylene blue (MB) within 100 minutes and 96% removal efficiency for 4-CP within 160 minutes. Importantly, the photocatalytic composite membrane can simultaneously achieve dye degradation and oil-water separation in only one device within a short time. And the as-prepared membrane displayed great antifouling performance and recyclability after 10 cycles. Meanwhile, the membrane showed excellent stability in the agitated water bath or different pH conditions. In summary, the photocatalytic membrane investigated in this study opens new avenue for treatment of wastewater.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Xinliang Liu,Jilong Mo,Wanhai Wu,Hainong Song,Shuangxi Nie
The generation of free radicals was enhanced by triboelectric pulsed direct-current during the organic pollutant degradation. The self-powered electrochemical system was constructed for enhancing 4-CP removal powered by a water-driven triboelectric nanogenerator (WD-TENG). The output of current, voltage, and power of WD-TENG were studied. The removal of 4-CP and its degradation mechanism were also discussed. The results shows that the formation of hydroxyl radicals (·OH) was improved by improving PMA(Mo 5+ ) conversion efficiency by the WD-TENG in the phosphomolybdic acid/H 2 O 2 (PMA/H 2 O 2 ) system, resulting the mineralizing the 4-CP via dichlorination and oxidation . The removal of 4-CP improved by 10% in 120 min in the WD-TENG powered electro-PMA/H 2 O 2 system. This study provides a promising methodology for improving the performance of self-powered electrochemical processes for the treatment of environmental pollution.
研究领域:
环境科学
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电化学工程
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产品关联
DOI
高影响因子
Journal of Environmental Sciences
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2025
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IF 6.3
Likai Wang,Donglin Liu
The degradation of persistent organic pollutants like 4-chlorophenol (4-CP) remains a critical challenge in wastewater treatment. Transition-metal sulfides have emerged as promising Fenton-like catalysts owing to their tunable electronic structures and abundant redox-active sites. Herein, we report a highly efficient Fenton-like system using ternary copper-iron sulfide (Cu x Fe y S z ) nanocatalysts for 4-CP degradation. Three Cu x Fe y S z phases—CuFe₂S₃, CuFeS₂, and Cu₅FeS₄—were synthesized and systematically evaluated, with CuFe₂S₃ demonstrating superior catalytic activity, achieving complete degradation of 20 mg/L 4-CP within 7 min using 5 mmol/L H₂O₂. Mechanistic studies reveal that sulfur vacancies in CuFe₂S₃ serve as key features, enhancing H₂O₂ adsorption and activation, as evidenced by in situ Raman spectroscopy. Comparative studies with CuFe₂S₃ analogues (0.7-CuFe₂S₃, 0.9-CuFe₂S₃, Fe₃S₄, and Cu₈S₅) confirm the unique catalytic efficiency of stoichiometric CuFe₂S₃, attributed to its optimal electronic structure and vacancy density. This work not only presents CuFe₂S₃ as a cost-effective and high-performance Fenton-like catalyst but also lays a solid foundation for the application of naturally occurring copper-iron sulfide minerals in wastewater treatment.
研究领域:
环境化学
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催化
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材料科学
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水处理技术
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高级氧化工艺
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Jiang Meng,Jianyu Han,Zhi Wang,Chunlei Yang,Xiaoning Lu,Jigang Wang
Persistent organic pollutants (POPs) present a substantial environmental challenge due to their enduring nature and adverse effects on human health. The exploration of photocatalysts featuring abundant active sites and appropriate band structures represents a promising approach for harnessing solar energy in photo-self-Fenton reactions for pollutant oxidation. In this investigation, a two-dimensional S-scheme FeOCl/C 3 N 4 heterostructure was fabricated for the degradation of POPs. The coordination between dangling nitrogen atoms in C 3 N 4 and Fe 3+ in FeOCl established a novel pathway for the transfer of photogenerated electrons, thereby prolonging their lifespan by mitigating recombination events. Assessment of the photocatalytic performance using 4-chlorophenol (4-CP) as a model pollutant revealed a 5.4-fold and 40-fold enhancement in degradation rate over FeOCl/C 3 N 4 compared to individual catalysts. Notably, nearly complete mineralization rates were achievable with FeOCl/C 3 N 4 , underscoring its robustness. Mechanistic investigations delineated hydroxyl radicals (•OH) as the primary active species responsible for pollutant degradation.
研究领域:
环境科学
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材料科学
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光化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
·
IF 6.735
Juan Yang,Jingyi Hao,Siyu Xu,Jun Dai,Yan Wang,Xinchang Pang
In this study, Nb 2 O 5 nanorods/graphene composites (NbO NRs/GR) are prepared by one-pot alkaline hydrothermal process, utilizing the new roles of graphene oxide (GO) as the structure-directing and morphology-controlling agent for the growth of NbO NRs. Compared to blank NbO, NbO/GR composites exhibit significantly improved photocatalytic activity for 4-CP degradation under visible-light irradiation, although 4-CP and NbO do not absorb visible light themselves. The in-situ formation of surface complexes between 4-CP and NbO and the subsequent charge transfer based on LMCT mechanism can be responsible for the visible photocatalytic activity. And meanwhile, the photoelectrons transferred to GR surface from in-situ formed complex (NbO/4-CP) via NbO NRs can initiate the synergistic Cr(VI) reduction. The GR contents and NbO crystalline phase have great effects on the photocatalytic activity of NbO/GR composites toward simultaneous 4-CP degradation and Cr(VI) reduction. The amorphous NbO/GR composite with 4.0 wt% GR (NbO-400/GR-4.0%) shows the highest photocatalytic activity. The influences of various experimental conditions (including the surface fluorination of NbO/GR, the initial concentrations of 4-CP and Cr(VI), pH, reaction atmosphere, and adding radical scavengers) on the visible photocatalytic activities are investigated in detail. According to the catalytic activity, UV-vis DRS and FT-IR spectra of NbO/4-CP or NbO/GR/4-CP, and photocurrent response in aqueous 4-CP solution, the formation of the surface complex is evidenced and the visible-light catalytic mechanism based on LMCT process is proposed.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Yuan Zhang,Kangping Cui,Xueyan Liu,Minshu Cui,Xing Chen,Yuchao Tang,Haiyang Li
Metal-based catalyst could be used for efficient peroxymonosulfate (PMS) activation, but inevitably suffered from metal ion leaching. Metal-free graphitic carbon nitride (g-C 3 N 4 ) materials that can activate PMS are more conducive for practical water treatment. In this study, g-C 3 N 4 with both N-defects and P-doping (CN-NP) was synthesized, which mainly produce singlet oxygen ( 1 O 2 ), and 97 % of 4-CP (4-Chlorophenol) was removed by CN-NP/PMS/Vis reaction system within 60 min. The active species was identified by quenching experiments and electron spin resonance (ESR) tests, and the origin of mainly active species was further verified by the concentration change of PMS during the reaction. It was verified by experiments and theoretical calculations that the introduction of N-defects led to the separation of photoinduced electron-hole pairs and improved photocatalytic activity. Notably, density functional theory (DFT) revealed that both N-defects and P-doping are electron-deficient sites, and P-doping acts as the main PMS adsorption site to promote the loss of electrons from PMS to generate 1 O 2 . In addition, the catalysts developed in this research were anticipated to be applied in real wastewater treatment, contributing to further comprehend the mechanisms of element doping and defect modification in g-C 3 N 4 activating PMS, and providing new insights for the design of PMS-activating catalysts.
研究领域:
环境科学
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材料科学
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催化
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水处理
✓ 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）