JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Ke Wang,Zipeng Xing,Meng Du,Shiyu Zhang,Zhenzi Li,Shilin Yang,Kai Pan,Jianjun Liao,Wei Zhou
A novel zinc sulfide quantum dot (ZnS QD)/zinc oxide (ZnO) nanosphere/bismuth-enriched bismuth oxyiodide (Bi 4 O 5 I 2 ) tandem heterojunction photocatalyst is fabricated through two-step solvothermal, calcination and one-step hydrothermal strategies. The successfully constructed core-shell nanostructure can increase the interface area and the active sites of the composite photocatalysts. The formation of a Z-scheme/Type-II tandem heterojunction favors the transfer and spatial separation of charge carriers, in which Bi 4 O 5 I 2 plays a bridging role to connect ZnO and ZnS. Simultaneously, the participation of Bi 4 O 5 I 2 significantly shortens the band gap of the composite photocatalyst. This dual functional ZnO@Bi 4 O 5 I 2 /ZnS composite photocatalyst has a high photocatalytic hydrogen evolution rate of 578.4 µmol g −1 h −1 and an excellent photocatalytic degradation efficiency for bisphenol A (BPA) and 2,4,5-trichlorophenol (TCP). In addition, cycling tests show that ZnO@Bi 4 O 5 I 2 /ZnS has a high stability, which is favorable for practical applications. This novel ZnO@Bi 4 O 5 I 2 /ZnS Z-scheme/Type-II tandem heterojunction photocatalyst will provide new ideas for the multichannel charge transfer of other highly efficient heterojunction photocatalysts.
研究领域:
材料科学
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环境科学
·
化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Kaiyue Li,Wenhui Li,Ping Huang,Yuquan Zhuo,Ziwen Yang,Bo Wang,Runru Liu,Bing Liu,Enzhu Hou,Shuo Yang,Donglai Han
To address the challenge of achieving simultaneous pollutant removal and real-time monitoring in water remediation, Z-scheme Cu 2 O/g-C 3 N 4 /Ag heterostructures with integrated functionalities for synergistic adsorption, photocatalytic degradation, and surface-enhanced Raman scattering (SERS) detection were developed—hereafter referred to as APS-Hs (adsorption–photocatalysis–SERS heterostructures). Particular emphasis was placed on the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs, incorporating an optimized 1.5 wt% Ag loading. Optical and electrochemical tests demonstrated that the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs significantly enhanced charge separation efficiency and reduced charge transfer resistance. Under visible-light irradiation, the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs attained a removal efficiency of 98.1 % for methyl orange (MO) within 45 min and sustained an efficiency of 84.0 % after three consecutive cycles. XRD and SEM analyses conducted before and after photocatalytic cycling confirmed the composite's outstanding structural and morphological stability. Notably, the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs demonstrated the highest adsorption capacity (21.34 mg/g) among all samples. Zeta potential measurements revealed a surface charge reversal from + 22.35 mV to −10.29 mV, indicative of strong electrostatic interactions with anionic pollutants. Pseudo-second-order (PSO) kinetic modeling (R 2 =0.971) further established physisorption as the dominant mechanism. Radical trapping experiments verified that the enhanced photocatalytic performance originates from the Z-scheme charge transfer pathway. Additionally, the Cu 2 O/g-C 3 N 4 /Ag-1.5 APS-Hs substrate achieved a SERS enhancement factor of 3.1 × 10 6 and a broadband self-cleaning capability, underscoring its potential for integrated environmental remediation and sensing applications.
研究领域:
环境科学
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材料科学
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水处理
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纳米技术
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分析化学
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产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2025
·Vol. 36
·期 32
·325101
·
IF 2.8
Wenyuan Li,Yuling Chen,Xiaolin Feng,Yanguang Chen,Xuanchun Hu,Caibai Yang,Yong Ye
Photocatalytic degradation is increasingly recognized as a highly effective approach for the removal of organic pollutants and pathogenic microorganisms from wastewater. Nevertheless, conventional unit catalysts often fall short of practical requirements, primarily due to their limited efficiency in photoinduced electron-hole transfer and the scarcity of active sites. In this work, three-dimensional porous material pg-C3N4 was synthesized utilizing the hard template method, employing dendritic mesoporous silica as the templating agent. And the nanoparticles of BiVO4/pg-C3N4 direct Z-heterojunction composite (BCN) were successfully constructed by using pg-C3N4 as growth template and BiVO4 in situ directed growth. The heterogeneous surface morphology of pg-C3N4 markedly enhances its capacity for visible light absorption and increases the availability of catalytic active sites. BCN demonstrates the ability to degrade 98% of Rhodamine B under simulated solar irradiation within 120 min and effectively inactivates 2 × 107 cfu ml−1 of E. coli under similar conditions within 60 min. Notably, after five cycles of use, the structural integrity and functional properties of the material remain largely unaltered. The superior photocatalytic degradation and photodynamic sterilization performance of BCN can be primarily attributed to its narrower band gap width of 2.34 eV, reduced electrochemical impedance, and enhanced separation and transfer rate of photogenerated carriers. Collectively, these properties facilitate the effective degradation of organic pollutants and the robust inactivation of bacteria by BCN under visible light irradiation. The successful implementation of this research offers a theoretical foundation and experimental insights for the future development of advanced Z-type photocatalysts.
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DOI
PubMed
高影响因子
Carbon Energy
·
2023
·Vol. 6
·期 3
·e447
·
IF 20.5
Mengmeng Ma,Jingzhen Li,Xiaogang Zhu,Kong Liu,Kaige Huang,Guodong Yuan,Shizhong Yue,Zhijie Wang,Shengchun Qu
Graphitic carbon nitride (g-C 3 N 4 ) has been extensively doped with alkali metals to enlarge photocatalytic output, in which cesium (Cs) doping is predicted to be the most efficient. Nevertheless, the sluggish diffusion and doping kinetics of precursors with high melting points, along with imprecise regulation, have raised the debate on whether Cs doping could make sense. For this matter, we attempt to confirm the positive effects of Cs doping on multifunctional photocatalysis by first using cesium acetate with the character of easy manipulation. The optimized Cs-doped g-C 3 N 4 (CCN) shows a 41.6-fold increase in visible-light-driven hydrogen evolution reaction (HER) compared to pure g-C 3 N 4 and impressive degradation capability, especially with 77% refractory tetracycline and almost 100% rhodamine B degraded within an hour. The penetration of Cs + is demonstrated to be a mode of interlayer doping, and Cs–N bonds (especially with sp 2 pyridine N in C═N–C), along with robust chemical interaction and electron exchange, are fabricated. This atomic configuration triggers the broadened spectral response, the improved charge migration, and the activated photocatalytic capacity. Furthermore, we evaluate the CCN/cadmium sulfide hybrid as a Z-scheme configuration, promoting the visible HER yield to 9.02 mmol g −1 h −1 , which is the highest ever reported among all CCN systems. This work adds to the rapidly expanding field of manipulation strategies and supports further development of mediating served for photocatalysis.
研究领域:
材料科学
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化学
·
环境科学
·
能源科学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Siqi Fang,Zhengang Bu,Yuanlin Zhan,Wenzhuo He,Yibin Huang,Jianhua Li
The indiscriminate of tetracycline (TC) has led to significant environmental and health concerns, particularly the proliferation of antibiotic resistance. This study presents a visible-light photocatalytic composite membrane with a Z-scheme heterojunction to improve TC removal efficiency and address the challenge of catalyst powder recovery in practical applications. Firstly, the PI/NH 2 -UiO-66 (PNs) composite photocatalyst was synthesized via a one-step thermal solvent method. Subsequently, the PVDF/MXene/PI/NH 2 -UiO-66 (PMPNs) composite fiber membrane was successfully fabricated by stably loading the PNs and MXene onto PVDF fiber membranes through electrospinning. Under visible light irradiation, the removal efficiency of TC by the PMPN1.5 composite fiber membrane could reach 86.07% through the combined effects of filtration, adsorption, and photocatalysis. Even after three cycles, the recovery rate of the PMPN1.5 membrane could still reach 86.16%. The enhanced photocatalytic performance was due to the Z-scheme heterojunction between PI and NH 2 -UiO-66. This heterojunction structure enhanced the redox capability of the photocatalyst. Additionally, the incorporation of MXene facilitated effectively charged carrier transfer at the heterojunction interface, prolonging the electron-hole separation time and further improving the photocatalytic capability. This study successfully integrates photocatalytic technology with membrane separation to develop a visible light-responsive composite fiber membrane with considerable potential for treating antibiotic-contaminated wastewater. The developed membrane not only mitigates fouling but is also easily recyclable, minimizing the risk of secondary pollution.
研究领域:
环境科学
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材料工程
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光催化
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纳米技术
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化学工程
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产品关联
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 16
·913
·
IF 3.5
Deng Min,Zhang Shasha,Liang Jiayi,Li Ziyuan,Jiang Hongbo,Zhao Weiwei,Pang Jingman,Wang Yan
A plate-like CoTiO 3/ TiO 2 nanocomposite was synthesized via H 2 O 2 pretreatment of layered hydrogen titanate (HTO) followed by Co 2+ ion exchange and topotactic transformation. The H 2 O 2 pre-intercalation expanded the interlayer spacing and introduced active peroxy groups, facilitating subsequent ion exchange. The resulting composite retained the plate-like morphology and exhibited enhanced visible-light photocatalytic degradation of rhodamine B (RhB). Under optimal conditions, the degradation efficiency reached 96.4%. A strong synergistic effect between the catalyst and peroxymonosulfate (PMS) was observed, significantly accelerating RhB removal. The catalyst also showed good reusability (> 90% after 5 cycles). Structural, morphological, and optical characterizations (XRD, SEM, TEM, XPS, Raman, FTIR) were performed. This work provides a novel strategy for designing 2D heterojunction photocatalysts with efficient PMS activation. Highlights • A novel “H 2 O 2 pre-intercalation–topotactic transformation” strategy is pioneered for the controllable synthesis of 2D CoTiO 3 /TiO 2 heterojunctions. • A remarkable synergy between photocatalysis and PMS activation is achieved, leading to >96% degradation efficiency of RhB with excellent cycling stability (>90% after 5 runs). • The interfacial charge-transfer pathway and the dual-channel radical generation mechanism are unraveled, establishing a clear structure–activity relationship. Graphical Synthesis route (left) and Z‑scheme charge transfer mechanism with PMS activation (right) of the plate‑like CoTiO 3 /TiO 2 composite.
The alternative text for this image may have been generated using AI.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 6
·4822-4835
·
IF 2.22
Zhou Nan,Tan Junjie,Li Xi,Wang Lu,Jin Chenglong,Chen Ming,Yu Zhengsong,Liang Yani,Qiu Zhidong,Li Wenlong,Dong Yulin,Xie Zhizhong,Lin Yawei,Qu Deyu,Zhang Chaocan
A series of Bi 5 O 7 I/MIL-53(Fe) (BOI/MIL- w ) composites were successfully prepared by a facile in-situ solvothermal approach. The matched energy bands enabled Bi 5 O 7 I and MIL-53(Fe) to form a Z-scheme heterojunction which resulted in an efficient separation of the photo-induced electron–hole pairs. The photocatalytic activity of BOI/MIL- w was evaluated by the degradation of Rhodamine B (RhB) in water under the visible light irradiation. Compared with Bi 5 O 7 I, photocatalytic performances of BOI/MIL- w notably boosted. When the content of added MIL-53(Fe) was 3 wt%, BOI/MIL-3 presented the highest activity with a degradation efficiency of 99.7% only after 60 min of irradiation. The reaction rate constant k could reach 0.0992 min −1 which was nearly 12.6 times as high as that of Bi 5 O 7 I. Moreover, BOI/MIL- w had a good stability and reusability, which could ensure its practical application. Trapping experiments confirmed that h + and ·O 2 − were the dominant active species during the photocatalytic process, and further demonstrated the formation of the Z-scheme heterojunction facilitated the photocatalytic performance of BOI/MIL- w .
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xingping Fu,Qianqian Chen,Ye Zhang,Feng Yu,Junjie Pan,Xiaobing Yang
The overuse of antibiotics, coupled with inadequate wastewater treatment, has led to widespread environmental contamination, posing significant risks to ecosystems and public health. In this study, a novel BiOCl/Bi 2 MoO 6 /MIL-125(Ti) heterojunction catalyst featuring a Z -scheme and II-type dual-functional junctions was prepared via a two-step solvothermal method and employed for the degradation of tetracycline (TC). The synthesized samples were thoroughly characterized by XRD, SEM, BET, TEM, and UV–vis spectroscopy. The results indicate that the incorporation of BiOCl and Bi 2 MoO 6 effectively tunes the band structure of MIL-125(Ti), enhancing its visible-light absorption. Moreover, the formation of the heterojunction interfaces significantly suppresses recombination of photogenerated charge carriers, thereby improving photocatalytic performance. Under visible-light irradiation, the BiOCl/Bi 2 MoO 6 /MIL-125(Ti) catalyst generates reactive radicals (·OH and ·O₂ − ), enabling efficient degradation of TC with a removal efficiency of 95.71 %. The synergistic effect of the Z -scheme and II-type heterojunctions plays a crucial role in the efficient photocatalytic degradation of TC. This study provides new insights into the degradation mechanisms of bifunctional heterojunctions and presents a promising strategy for designing high-performance photocatalysts for tetracycline degradation.
研究领域:
环境科学
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材料化学
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光催化
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环境污染治理
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纳米材料
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药物降解
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半导体异质结
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Zhiyuan Liu,Shiying Fan,Xinyong Li,Zhaodong Niu,Jing Wang,Chunpeng Bai,Jun Duan,Moses O. Tadé,Shaomin Liu
We demonstrate a composite photocatalyst for nitric oxide conversion, which consists of the Cu–Fe alloy and the Z-scheme of graphitic carbon nitride (g-C3N4) and ZnIn2S4, and the excellent photocatalytic performance is 6.45-fold that of g-C3N4. Time-resolved photoluminescence confirmed the delay effect on the charge recombination. Transient absorption spectroscopy indicated that the heterojunction establishment was mainly due to the hole-trapping ability of ZnIn2S4. The combined effects of the Cu–Fe alloy were confirmed by the NO-specific adsorption and conversion experiments. The involved active species was examined via electron spin resonance. The density functional theory calculations revealed the molecular mechanisms of photocatalytic conversion of NO to NO3–. Therefore, g-C3N4|ZnIn2S4|CuFe has the potential to help meet the challenges in sustainable and efficient pollutant conversion.
研究领域:
环境科学
·
材料科学
·
化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xinyan Wang,Yuting Zhang,Jian Zhang,Chengpeng Shao,Jiaxing Yang,Yuning Zhang,Ruoyi Li,Zheng Xing
In this study, a Z-type heterojunction photocatalyst CoWO 4 /CS/BiOCl-10 was constructed by hydrothermal synthesis for the efficient removal of norfloxacin (NOR) contaminants in water. X-ray photoelectron spectroscopy (XPS) combined with Fourier transform infrared spectroscopy (FT-IR) confirmed that the hydroxyl group in the chitosan (CS) molecule was bonded with the oxygen atom on the surface of CoWO 4 through hydrogen bonding to form a directional charge transport channel, which greatly improved the photocatalytic degradation efficiency of CoWO 4 /CS/BiOCl-10, and the degradation rate was as high as 98.30 % within 90 min under 300 W xenon lamp irradiation. Optoelectronic measurements show that the interfacial potential difference drives electrons to migrate along the Z-path. Density functional theory (DFT) and liquid chromatography-mass spectrometry (LC-MS) were used to identify intermediates in the NOR degradation process, revealing the degradation pathway of NOR through piperazine ring cleavage and defluorination. The kinetics of NOR degradation intermediates were revealed using two-dimensional correlation spectroscopy (2DCOS) techniques. Rice seed germination experiments have shown that the degraded NOR solution is virtually non-toxic, greatly reducing the environmental impact. This study provides a new strategy for the development of efficient photocatalytic systems through the synergistic regulation mechanism of hydrogen bonding and heterojunction.
研究领域:
环境科学
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材料科学
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光催化
·
水处理
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化学工程
·
光谱学
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毒理学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 13
·20621-20636
·
IF 0
Yin Bingjie,Li Jingying,Guo Wei,Dong Haoqing,Zhang Guangshan,Xin Yanjun,Zhang Guodong,Chen Qinghua
Polycyclic aromatic hydrocarbons (PAHs) in soil are potentially harmful to human health. However, the use of photocatalysis technology to treat soil contaminated with PAHs remains challenging. Therefore, TiO 2 /α-FeOOH composite photocatalyst has been synthesized by hydrothermal method and sol–gel method and applied to photocatalytic degradation of fluoranthene in soil. The morphology, elements, crystal structure, optical properties, electrochemical characteristics, and photocatalytic activity of TiO 2 /α-FeOOH have been characterized. Results showed that TiO 2 is tightly fixed on the surface of α-FeOOH, and TiO 2 /α-FeOOH had higher photocatalytic activity on photocatalytic degradation of fluoranthene in soil under simulated sunlight. The degradation efficiency of TiO 2 /α-FeOOH is 3.0 and 4.8 times higher than that of TiO 2 and α-FeOOH, respectively. This is attributed to enhanced photocatalytic ability by enhancing the transfer capacity of electrons and holes and broadening the spectrum absorption range. The highest degradation efficiency was achieved when the pH of the soil is neutral, the ratio of water/soil is 10:1, and the dosage of catalyst is 50 mg/g. In addition, it was proved that •O 2 − , h + , and 1 O 2 are the main active substances in the photocatalysis of TiO 2 /α-FeOOH. The possible mechanism of a Z-type electron transfer structure was also proposed. The degradation products of fluoranthene were detected, and the degradation pathway was deduced.
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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土壤修复
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纳米技术
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DOI
ChemistrySelect
·
2025
·Vol. 10
·期 30
·e01615
·
IF 2
Bing Wang,Pinliang Lai,Jian Zhang,Guomin Li,Rao Fu,Hui Liu
Graphical The AgPCN+APS photocatalytic system was constructed in situ and its performance in degrading dyes in complex water environments was systematically investigated. It is of vital importance to develop highly efficient photocatalysts capable of removing dyes from actual wastewater environments. In this study, we constructed a in-situ, novel P-doped g-C 3 N 4 /Ag 3 PO 4 Z-scheme heterojunction photocatalyst (AgPCN) to degrade rhodamine B(RhB) in wastewater activated by persulfate (APS). Without the addition of persulfate, the kinetic degradation constant of RhB degraded by AgPCN can reach 0.53619 min −1 . Under the activation with a specific amount of persulfate, the kinetic degradation constant of RhB in the AgPCN + APS photocatalytic system can reach 0.78844 min −1 , which is 1.47 times higher than that of pure AgPCN. This is attributed to the structural defects of AgPCN itself and the energy level transformation caused by doping. Additionally, the activation of APS stimulates the generation of free radicals such as SO 4 · 2− , O 2 · − , and ·OH during the degradation process of AgPCN. It is worth noting that the AgPCN + APS system has a wide pH tolerance, indicating its application potential in complex actual wastewater environments. After three cycles of experiments, it still maintained a degradation efficiency of over 95%. Therefore, the AgPCN + APS system features excellent stability and wide applicability, providing a promising technical approach for the industrial treatment of dye wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
·
光催化
·
水处理技术
✓ 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）