CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiangcheng Shan,Xiao Yang,Fuyu Liu,Xiaoyu Zhang,Jiazhe Chen,Dehao Liu,Qingzhe Zhang,Runzeng Liu,Yongguang Yin,Yong Cai
The photocatalytic reduction of highly toxic and soluble U(VI) to low toxic and insoluble U(IV) represents an environmentally friendly and efficient approach for uranium extraction. However, the application of photocatalytic U(VI) reduction is limited by low efficiency and challenges in recovering powder catalysts. In this study, we develop magnetically recyclable photocatalysts by integrating Fe 3 O 4 particles with in-situ grown ZnIn 2 S 4 /CdS Z -scheme heterojunctions (FO@ZIS/CS). Without adding any sacrificial agents, about 100 % of U(VI) in 50-mL aqueous solution (20 mg/L) is reduced by FO@ZIS/CS within 30-min visible light irradiation, which is 2.8 times higher than that of pristine ZnIn 2 S 4 (36 %). The remarkable performance is attributed to the Z -scheme heterojunction formed between ZnIn 2 S 4 and CdS, which promotes charge separation and preserves strong redox capabilities. Comprehensive experiments and theoretical simulations reveal that S and In atoms on ZnIn 2 S 4 (110) facets act as the active species for the U(VI) adsorption and reduction. Moreover, the FO@ZIS/CS photocatalyst maintains high U(VI) reduction efficiency in complex water matrices. The used FO@ZIS/CS and the adsorbed U(IV) can be easily recovered by an external magnetic field. This work offers a practical strategy for reducing and extracting U(VI) from mining wastewater, achieving both environmental remediation and resource recycling objectives.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Zeming Gu,Qi Wang,Xiaoqin Sun,Lingwei Lu,Yuwei Zhang,Ran Wang,Shu Jin,Yinlin Shao,Jun Qian,Xiaoxiang Xu
P-type semiconductivity has been observed in solid solution series (SrTiO 3 ) 1- x (CaCr 0.5 Nb 0.5 O 3 ) x (0.0 ≤ x ≤ 0.15), which all adopt cubic symmetry and own intense absorption in the visible light region. These solid solutions are superior H 2 evolution photocatalysts under visible light illumination (λ ≥ 400 nm). An AQE as high as 1.02 % at 420 ± 20 nm has been achieved at optimal composition (SrTiO 3 ) 0.85 (CaCr 0.5 Nb 0.5 O 3 ) 0.15 which significantly surpasses the parent compounds. Stoichiometric H 2 /O 2 production under visible light illumination has been successfully realized using Z-scheme system containing (SrTiO 3 ) 0.85 (CaCr 0.5 Nb 0.5 O 3 ) 0.15 , WO 3 and I − /IO 3 − redox couple.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
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IF 7.489
Ruisen Jing,Junshan Yang,Shutao Li,Shifeng Zhao,Pengfei Wang,Yunyan Liu,Aiju Liu,Zilin Meng,Hongwei Huang,Zhilei Zhang,Qian Zhang
The use of black phosphorus (BP) nanosheets has attracted much attention in the area of photocatalysis owing to the thickness-tunable bandgap and high carrier mobility. In order to improve the stability of BP nanosheets, poly dimethyldiallyl ammonium chloride (PDDA) is used to passivate the BP nanosheets and change its surface properties. The present study concerns the development of a facile electrostatic assembly method for the construction of a Z-scheme system consisting of PDDA-functionalized BP nanosheets and layered BiOI in order to enhance visible light adsorption and promote electron-hole separation. The morphology, structure and photoelectrochemical properties of the composites are thoroughly characterized and the photocatalytic performances of all the samples were assessed under visible light irradiation. The 5-F-BP/BiOI exhibits excellent photocatalytic activity with removal efficiencies of 97.6% and 90.0% for methylene blue (MB) and tetracycline (TC), respectively. Superoxide radicals (·O 2 – ) were found to be the main organic decomposition products according to species trapping experiments. The photocatalyst presents favorable stability after three catalytic cycles. This study provides new insights into the design of highly efficient Z-scheme photocatalysts based on functionalized BP nanosheets in order to meet environmental demands.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jinhua Luo,Yaohui Wu,Xiaoyong Chen,Tianpei He,Yelin Zeng,Guangjun Wang,Yonghong Wang,Yunlin Zhao,Zhifen Chen
Developing efficient and economical photocatalysts was considered as an efficient and economical strategy for pollution remediation. Herein, magnetically separable ZnFe 2 O 4 /CuWO 4 composites (ZW) had been developed via combining ZnFe 2 O 4 with CuWO 4 . The composite with a mass ratio of 40% CuWO 4 (ZW-40) performed best, and the tetracycline hydrochloride (TC) removal by adsorption-photocatalysis of ZW-40 reached 86.5%. The photocatalytic degradation rated constant of it was 9.44 × 10 −3 min −1 , which was approximately 5.04 and 3.28 times compared to the ZnFe 2 O 4 and CuWO 4 samples, respectively. Pseudo-second-order kinetic models could describe well the TC adsorption process , in which chemisorption was the major driving factor, with the maximum adsorption at 23.56 mg g −1 . The improved photo-catalytic capability owed to the formation of Z-scheme heterojunctions with ZnFe 2 O 4 and CuWO 4 , which improved the intensity of visible light absorption and enhanced the separation electron-hole pairs as well as the redox capability of the composite. ZW-40 was high stability as its removal ability of TC in different water conditions slightly dropped about 15% after 5 cycles. ZW-40 could effectively remove TC in different water matrix, its removal ability for 40 mg/L was as follows: super-pure water> municipal wastewater> swine farm wastewater. Hence, the complexation of ZnFe 2 O 4 with CuWO 4 provides a valuable strategy to improve the photocatalytic potential for ZnFe 2 O 4 -based catalysts as well as providing a promising pathway for water clarification.
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
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Shen-wei Bai,Hui Mei,Zhi-peng Jin,Shan-shan Xiao,Lai-fei Cheng
In this article, we for the first time synthesized a series of SiC@Zn 0.5 Cd 0.5 S core-shell Z-scheme nanostructure, with the thickness of the shell varies from 12 nm to 60 nm, and the excellent photocatalytic exists because of the Z-scheme heterojunction mechanism. The Z-scheme system of SiC@Zn 0.5 Cd 0.5 S core-shell structure was proven by the in situ irradiated X-ray photoelectron spectroscopy, the system separated the photo-generated electron-hole pairs, and the core-shell structure performed better photocatalytic properties than Zn 0.5 Cd 0.5 S on the hydrogen production under UV–vis light irradiation. With decreasing of the shell thickness, the transient photocurrent response of the SiC@Zn 0.5 Cd 0.5 S increased and the photoluminescence decreased, anticipating the creation, collection, transportation of electrons/holes increased, and the electrons/holes recombination suppressed. The hydrogen production rate enhanced to 334% comparing with pure Zn 0.5 Cd 0.5 S, showing the advantage of SiC@Zn 0.5 Cd 0.5 S core-shell Z-scheme heterojunction nanostructure.
研究领域:
材料科学
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能源科学
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光催化
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Ligang Ma,Yuqing Yang,Tianyu Zhu,Yihuan Ding,Chao Lin,Le Xu,Xiaoqian Ai
In this paper, hexagonal ZnIn 2 S 4 nanoflowers were grown in situ on tetragonal WO 3 ·H 2 O nanosheets, yielding a compact ZnIn 2 S 4 @WO 3 ·H 2 O (ZIS@WO) core-shell heterojunction. The formation of the ZIS@WO heterojunction was optimized by meticulously adjusting the quantity of WO 3 ·H 2 O nanosheets incorporated. The crystal structure and microstructure of ZIS@WO were comprehensively examined using XRD, TEM and EDS analyses. The photocatalytic properties of ZIS@WO heterojunctions were evaluated through the degradation of organic pollutants under visible light irradiation. The results demonstrated a marked enhancement in photocatalytic efficiency for the ZIS@WO heterojunction. Further investigation into the separation and transport of photogenerated carriers were performed using PL spectroscopy and photoelectrochemical measurement. Compared to the individual components of ZnIn 2 S 4 nanoflowers and WO 3 ·H 2 O nanosheets, the ZIS@WO heterojunction creates an internal electric field at the interface, along with a compact core-shell configuration. This internal electric field, in conjunction with the band structure of the heterojunction, effectively accelerates the separation of photogenerated electrons and holes. Additionally, a comprehensive analysis of the photocatalytic degradation mechanisms were presented, elucidating the intricate processes.
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
CATALYSIS LETTERS
·
2025
·Vol. 155
·期 5
·1-16
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IF 2.4
Bai Yang,Chen Zhongxiang,Gu Deng,Wang Ren,He Jianing
The Surface Plasmon Resonance (SPR) effect and the construction of Z-scheme heterojunctions are critical for enhancing photocatalytic rates. Herein, a composite material composed of a Z-scheme heterojunction structure, AgInS 2 /g-C 3 N 4 (AIS/GCN), was developed and further optimized through the modification of Ag nanoparticles (Ag NPs). The SPR effect of Ag NPs significantly improved the electron transfer characteristics of GCN, leading to enhanced separation efficiency of electron-hole pairs. By leveraging the advantages of the Z-scheme heterojunction, the composite not only effectively enhanced charge carrier separation but also improved light absorption and increased the density of active catalytic sites. To evaluate the photocatalytic degradation efficiency of Rhodamine B (RhB) and the photoreduction efficiency of Cr (VI) using the Ag/AIS/GCN nanocomposite, a systematic characterization analysis was conducted. The results demonstrated that the degradation rate and photoreduction efficiency of the Ag NPs-modified AIS/GCN Z-scheme heterojunction composite were 5.30 times and 7.22 times higher than those of pure GCN, the TOC removal rate of the sample reached 56.19%. The incorporation of Ag NPs and AIS significantly enhanced light energy utilization efficiency, increased the number of surface-active sites, and improved charge carrier transport rates. This study illustrates that the combination of the SPR effect and Z-scheme heterojunction construction markedly enhances the efficiency and stability of the photocatalyst, indicating the broad potential applications of this composite in dye purification and heavy metal removal. Graphical
研究领域:
材料科学
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环境科学
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纳米技术
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产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 24
·5930
·
IF 4.2
Liang Hao,Jingfei Luan
A highly versatile Z-scheme heterostructure, Ho2SmSbO7/YbDyBiNbO7(HYO), was synthesized using an ultrasonic-assisted solvent thermal method. The HYO heterojunction, composed of dual A2B2O7compounds, exhibits superior separation of photogenerated carriers due to its efficient Z-scheme mechanism. The synergistic properties of Ho2SmSbO7and YbDyBiNbO7, particularly the excellent visible light absorption, enable HYO to achieve exceptional photocatalytic performance in the degradation of fenitrothion (FNT). Specifically, HYO demonstrated an outstanding removal efficiency of 99.83% for FNT and a mineralization rate of 98.77% for total organic carbon (TOC) during the degradation process. Comparative analyses revealed that HYO significantly outperformed other photocatalysts, including Ho2SmSbO7, YbDyBiNbO7, and N-doped TiO2, achieving removal rates that were 1.10, 1.20, and 2.97 times higher for FNT, respectively. For TOC mineralization, HYO exhibited even greater enhancements, with rates 1.13, 1.26, and 3.37 times higher than those of the aforementioned catalysts. Additionally, the stability and durability of HYO were systematically evaluated, confirming its potential applicability in practical scenarios. Trapping experiments and electron paramagnetic resonance analyses were conducted to identify the active species generated by HYO, specifically hydroxyl radicals (•OH), superoxide anions (•O2−), and holes (h+). This facilitated a comprehensive understanding of the degradation mechanisms and pathways associated with FNT. In conclusion, this study represents a substantial contribution to the advancement of efficient Z-scheme heterostructure and offers critical insights for the development of sustainable remediation approaches aimed at mitigating FNT contamination.
研究领域:
材料科学
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环境科学
·
光催化技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2024
·
IF 1.4
Ze Cheng,Fuxiao Zhu,Bihui Jin,Zhenhua Hou,Hongbin Li,Gongliang Zhang,Hongman Hou,Jingran Bi,Shuang Yan,Hongshun Hao
Photocatalytic technology has been widely studied, discussed, and tested as a feasible wastewater degradation technology. The present study demonstrated the preparation of g-C 3 N 4 material using solid-state sintering method and the construction of Bi 4 Ti 3 O 12 /g-C 3 N 4 heterostructure via hydrothermal method. This direct contact Z-type heterojunction improves the wide bandgap of Bi 4 Ti 3 O 12 monomer, enhances its photoresponsiveness, and thus improves its photocatalytic performance. During the process of photocatalytic experiments, an environment of cold and hot fluctuations were created, and the pyroelectric effect was utilized to induce self-polarization of the material and formed an internal electric field. It improves the transport ability of electron–hole pairs and suppresses their recombination in the transport path. According to the degradation experiment results, the degradation efficiency of pyroelectric synergistic heterojunction photocatalysis reached 88.7%, which was 2.27 times that of Bi 4 Ti 3 O 12 . It proves that the photocatalysis by pyroelectric synergistic heterojunction has good application prospects.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Bolong Liang,Xiaoyu Huang,Xi Zhu,Hongbin He,Shu-xuan Liang
Ciprofloxacin accumulates in aqueous environment due to its non-degradability. Photocatalysis, as an economical and efficient treatment technology for organic matter, is mostly used to remove antibiotics from water environment. However, the photocatalytic performance is limited by photocatalysts, which suffer from wide band gap and severe recombination of photogenerated electrons and holes. Therefore, we developed a Z-scheme heterojunction photocatalyst Fe-ZIF-8@AgCl, which was synthesized by combining pre-prepared Fe-ZIF-8 with AgCl. Meanwhile, the X-ray diffractometer, scanning electron microscopy, transmission electron microscopy, Brunauer-Emmett-Teller analysis and X-ray photoelectron spectroscopy were employed to characterize the structure of Fe-ZIF-8@AgCl, and a series of photoelectric tests were conducted to demonstrate the photocatalytic properties of Fe-ZIF-8@AgCl. The results revealed that Fe-ZIF-8@AgCl had a remarkable 71.9 % removal efficiency of ciprofloxacin by photodegradation in 120 min. Fe-ZIF-8@AgCl could help reduce band gap energy, inhibit the recombination of photoelectrons and holes, lower the charge transfer resistance, and enhance the photocurrent response. Furthermore, Fe-ZIF-8@AgCl still maintained a high photocatalytic performance after 4 cycles, and ·O 2 - was detected and identified as the main photocatalytic active factor. Subsequently, the charge transfer mechanism of direct Z-scheme heterojunction was proposed, and the photocatalytic degradation pathways of ciprofloxacin were analyzed. In this study, Z-scheme heterojunction photocatalyst was prepared and showed great potential for efficient photodegradation of ciprofloxacin.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Xinshan Rong,Haifei Chen,Jian Rong,Xiaoying Zhang,Jing Wei,Shuang Liu,Xiangtong Zhou,Jicheng Xu,Fengxian Qiu,Zhiren Wu
In this report, environmental and energy issues were deal with a Z-scheme photocatalytic system toward the synthetic ammonia by N 2 photofixation. Different from traditional double-charge-transfer model, a direct all-solid-state Z-scheme system of modified TiO 2 (MT) loaded with ZnFe 2 O 4 (ZFO) was obtained by solvothermal-calcination method, in which calcination temperature is crucial for the mesoporous structure and formation of Z-scheme TiO 2 /ZnFe 2 O 4 . At ambient temperature and pressure, the MT/ZFO photocatalyst presented the ammonia generation rate of about 1.48 μmol/L/min, which is higher than that of single MT or ZFO. The photocatalytic activity enhancement of ammonia generation was attributed to the Z-scheme charge transfer model with a more negative reduction potential in the conduction band of ZnFe 2 O 4 . Combining the commonly TiO 2 and ZnFe 2 O 4 by a special method shows a desirable Z-scheme photocatalytic system, which can be extended to the fabrication of other Z-scheme photocatalyst according to the various application need.
研究领域:
环境科学
·
能源科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Ziyi Jiang,Guoyu Wei,Changhong Guo,Huiming Lin
The growing issue of environmental pollution, particularly water contamination by the spread of bacteria and organic dyes, eagerly demands to be resolved. Given its advantages of being efficient, convenient, and eco-friendly, photocatalysis stands out as a promising strategy for water purification. To harness solar energy effectively, Co 3 S 4 nanodots with a narrow band gap were integrated onto the surface of NiTiO 3 nanoflowers to construct heterostructure (NC-x). Detailed characterization revealed that the charge transfer mechanism belonged to a novel Z-scheme, which not only facilitated efficient electron-hole separation into different components but also maintained a high redox potential, leading to the generation of plenty of reactive oxygen species (ROS: . O 2 - and . OH). These ROS were instrumental in damaging bacteria and the degradation of organic dyes. Furthermore, the NC-x nanocomposite exhibited excellent photothermal property and the local hyperthermia further enhanced the photocatalytic reaction. Optimized for composition, NC-2 shows the effective inactivation to E. coli, achieving a lethality rate of 99.50±0.22 % under simulated sunlight irradiation. It has also been successfully applied to treat complex lake water samples, demonstrating significant antibacterial (99.82±1.28 %) and methylene blue (90.60±1.78 %) degradation efficiency, simultaneously. With the novel biocompatibility and decontamination capabilities, NC-2 holds substantial potential for water purification applications.
研究领域:
环境科学
·
材料科学
·
光催化技术
✓ 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）