APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Ning Li,Xueyun Gao,Haikuan Fan,Yangqin Gao,Lei Ge
Effective and suitable utilization of solar energy was achieved using a full-spectrum-response photocatalyst AgBr/Cs x WO 3 , applied in the photocatalytic and photochromic field. Benefitting from near-infrared (NIR) absorption ability of Cs x WO 3 , AgBr/Cs x WO 3 exhibits enhanced visible-near-infrared (Vis-NIR) driven photocatalytic activity. Based on X-ray photoelectron spectroscopy (XPS), photoluminescence spectra (PL), and the photoelectrochemical analysis, AgBr and Cs x WO 3 formed a Z-scheme system at the interface to efficiently separate and transfer photo-induced electrons at a fast rate. The quenching experiment and the electron spin resonance (ESR) tests indicated that the photocatalytic reaction is activated by the production of superoxide radicals. Furthermore, the photochromic analysis to different light exhibits the AgBr/Cs x WO 3 heterostructure is stable under visible light with negligible photodeposition of AgBr, and has excellent double photochromic activity with visible-shielding effect of AgBr to Ag 0 and infrared-blocking effect of Cs x WO 3 under ultraviolet light. This research provides new insights into the manufacture of energy-efficient and environmentally friendly materials that provide excellent performance in both thermal insulation and decontamination.
研究领域:
材料科学
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物理化学
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纳米催化
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光化学
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功能材料
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环境净化
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能源材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Xiangwei Zou,Bo Sun,Liang Wang,Hongcun Bai,Xiangchao Meng,Chunhu Li,Zizhen Li
Designing low-cost and efficient photocatalysts for the degradation of antibiotic contaminants in water is crucial for environmental remediation. In this study, we synthesized SnS 2 /Bi 2 MoO 6-x composites with a synergistic modulation of oxygen vacancies (OVs) and a Z-scheme charge transfer mechanism using a simple hydrothermal method. The synthesized composites, designated as SBMO-5, were used for the photocatalytic degradation of tetracycline (TC). Notably, SBMO-5 exhibited the highest reaction rate constant (0.01385 min −1 ), surpassing pristine SnS 2 (0.00129 min −1 ) and Bi 2 MoO 6 (0.00312 min −1 ) by 10.7 and 4.4 times, respectively. The enhanced photocatalytic degradation performance can be ascribed to the synergistic effect of the Z-scheme electron transfer mechanism and OVs. The unique Z-scheme electron transfer channel both accelerated the separation of photogenerated charge carriers and exploited the strongest oxidation and reduction capabilities within the constituent materials. Furthermore, the low-cost and readily available OVs modification enhanced absorption of visible light. Additionally, we investigated the influence of various experimental conditions on the degradation efficiency of SBMO-5, predicted the degradation pathways of TC , and evaluated the toxicity of the intermediates. Overall, this study provides insights into the application of efficient catalysts for pollutant degradation under a multi-electric field modulation strategy.
研究领域:
环境科学
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材料科学
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化学工程
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光化学
✓ 已验证
DOI
高影响因子
Applied Materials Today
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2020
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IF 8.352
Xin Du,Tianyu Zhao,Ziyuan Xiu,Zipeng Xing,Zhenzi Li,Kai Pan,Shilin Yang,Wei Zhou
Novel BiVO 4 @ZnIn 2 S 4 /Ti 3 C 2 MXene quantum dots (QDs) assembly all-solid-state direct Z-scheme photocatalyst is fabricated via in-situ growth combined with two-step solvothermal strategy, which forms a hierarchical core-shell structure. The proper energy band structure of BiVO 4 and ZnIn 2 S 4 and the formation of a good solid-solid contact interface between them promote the construction of Z-scheme system, which achieves effective charge separation. It is surprisingly discovered that Ti 3 C 2 MXene QDs can be applied as cocatalysts for photocatalytic overall water splitting, which could accelerate the surface redox kinetics of the catalyst due to the unique properties of Ti 3 C 2 MXene QDs . In particular, due to its excellent metal conductivity, a Schottky barrier can be formed at the interface in contact with ZnIn 2 S 4 , further promoting charge separation. BiVO 4 @ZnIn 2 S 4 /Ti 3 C 2 MXene QDs achieves effective visible-light-driven pure water splitting into O 2 and H 2 evolution rates up to 50.83 and 102.67 μmol g −1 h −1 (~1:2). In addition, it also shows high photocatalytic degradation Bisphenol A efficiency of ~96.4 %. The high photocatalytic performance can be ascribed to the all-solid-state direct Z-scheme structure favoring spatial charge separation, Ti 3 C 2 MXene QDs as cocatalysts promoting proton reduction, and hierarchical core-shell structure offering more surface active sites. This work provides new insights to fabricate high-performance direct Z-scheme assembly system.
研究领域:
材料科学
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光催化
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能源化学
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纳米材料
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环境科学
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半导体物理
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表面科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Xuemei Chen,Pengfei Zhu,Xiya Xin,Yu Chen,Xinglin Li
In this paper, a novel and highly efficient Bi 2 S 3 /Bi 2 WO 6 /SnS 2 double Z-scheme heterojunction photocatalyst was synthesized by a solvothermal method for the degradation of tetracycline hydrochloride (TC). After 60 min of visible light photocatalytic reaction, the degradation rate of TC at 20 mg/L by the Bi 2 S 3 /Bi 2 WO 6 /SnS 2 catalyst was as high as 92.33 %, the removal rate of total organic carbon (TOC) was 66.15 %, and the toxicity of the TC degradation solution decreased significantly. The pseudo-first-order reaction kinetics fitting constant (0.02731 min −1 ) for its photocatalytic degradation of TC was 5.71 and 1.87 times that of pure Bi 2 WO 6 (0.00478 min −1 ) and Bi 2 S 3 /Bi 2 WO 6 (0.01462 min −1 ), respectively. Meanwhile, the Bi 2 S 3 /Bi 2 WO 6 /SnS 2 photocatalyst also has excellent salt tolerance, versatility and cycling stability, showing good application potential. Multiple characterization results reveal that the enhancement of the activity of the Bi 2 S 3 /Bi 2 WO 6 /SnS 2 photocatalyst is mainly due to the fact that, on the one hand, the coupling of Bi 2 S 3 and SnS 2 to Bi 2 WO 6 greatly improves the visible light response ability of the catalyst. On the other hand, it significantly increases the surface area of the catalyst, not only enhancing its adsorption capacity but also exposing more surface active sites. Most importantly, the formation of the double Z-scheme heterojunction between Bi 2 S 3 , SnS 2 and Bi 2 WO 6 enhances the interfacial charge transfer efficiency, thereby promoting the effective separation of photogenerated electrons and holes. This paper provides a new strategy for purifying antibiotics in water by using Bi 2 WO 6 -based photocatalysts.
研究领域:
环境科学
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材料科学
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化学工程
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光催化
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水处理
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Yijun Luo,Wenxin Yang,Jincheng Liu,Wei Cai,Zewei Liao,Xiaoyan Xiang,Bingjie Li,Yanxiong Fang
The concurrent production of renewable hydrogen and valorization of biomass represents a promising strategy to tackle energy sustainability and environmental concerns. However, designing efficient bifunctional photocatalytic systems capable of driving both reactions remains a significant challenge. This study introduces a Z-scheme heterojunction composed of graphitic carbon nitride (g-C 3 N 4 ) and titanium dioxide (TiO 2 ), synthesized through a combined hydrothermal and self-assembly approach, for simultaneous photocatalytic H 2 evolution and selective oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-diformylfuran (DFF). The heterostructure establishes an internal electric field that directs photogenerated electrons to g-C 3 N 4 and holes to TiO 2 , thereby facilitating effective charge-carrier separation while preserving their strong redox potentials . Structural analyses confirm the uniform growth of TiO 2 nanorods with reduced diameter of less than 10 nm on g-C 3 N 4 nanosheets, which enhances light harvesting and exposes abundant reactive sites. Under optimized conditions, the composite exhibited exceptional performance, achieving H 2 and DFF production rates of 481.9 μmol g −1 h −1 , respectively, with 92.8 % DFF selectivity. This represents a 3.8-fold enhancement in activity compared to pristine g-C 3 N 4 . The improved efficiency is attributed to the Z-scheme charge-transfer pathway, which mitigates recombination losses and optimizes the utilization of electrons and holes for respective reduction and oxidation reactions. This work provides a scalable framework for integrating green hydrogen generation with biomass refining, advancing the development of multifunctional photocatalysts for sustainable energy and chemical synthesis.
研究领域:
光催化
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材料科学
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能量转换
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环境可持续性
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化学合成
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
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2025
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IF 6.4
Kexin Yang,Zhijia Song,XiaoXiao Fu,Wei Yan,Tao Zhang,Yiwei Hua,Haixin Lin,Qin Kuang,Zhaoxiong Xie
The photocatalytic direct one-step two-electron (2e-) oxygen reduction reaction (ORR) holds great potential in efficient H2O2 synthesis. However, it is still a significant challenge to design photocatalysts for achieving high-efficiency H2O2 production via this direct one-step 2e- ORR pathway. To address this, we have constructed a Z-scheme BAIO/C3N4 heterojunction by in situ growing Ba2AgIO6 (BAIO) on the surface of C3N4 nanosheets. Under visible light irradiation, the optimal sample, with a BAIO:C3N4 mass ratio of 1:1.5, exhibited a remarkable H2O2 yield of up to 535.9 μmol g-1 h-1, which is 8.8 times higher than that of pure C3N4. This enhancement is attributed to the improved charge separation and migration efficiency facilitated by the enhanced internal electric field (IEF) in BAIO/C3N4 heterojunction. Furthermore, the heterojunction altered the O2 adsorption configuration to the Yeager-type, promoting a more efficient and selective direct one-step 2e- ORR for H2O2 production. This study highlights the importance of regulating the reaction pathway to enhance photocatalytic H2O2 production activity and offers a new insight for designing highly active photocatalysts.
研究领域:
光催化
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材料科学
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环境科学
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能量转换
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化学反应工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
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IF 10.9
Mingyi Yu,Jianbo Wang,Guojun Li,Shule Zhang,Qin Zhong
Indium vanadate (InVO 4 ) possesses excellent potential in photocatalytic carbon dioxide (CO 2 ) reduction, but further modifications of reducing charge recombination and increasing active sites are still needed. Herein, InVO 4 /g-C 3 N 4 (InVO-CN) heterojunction composite photocatalysts were prepared via in situ formation of InVO 4 nanoparticles on the lamellar structure of graphite carbon nitride (g-C 3 N 4 ) containing nitrogen (N) defects. Among these composites, 30% InVO-CN showed the best photoreduction performance for CO 2 at normal temperature and pressure without sacrificial agent (carbon monoxide, CO: 20.14 μmol g –1 h –1 ; methane, CH 4 : 3.46 μmol g –1 h –1 ), which were 1.8 and 2.8 times higher than these of pure g-C 3 N 4 and InVO 4 . The excellent performance could be attributed to the enhancement of CO 2 adsorption, and most importantly, the enhanced charge carrier separation and reduction capacity induced by the formation of Z-scheme heterojunction between InVO 4 and g-C 3 N 4 . In this work, intimate heterojunction interfaces between materials were formed by introducing g-C 3 N 4 with defects in InVO 4 , which provides a promising modification scheme.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Chunhua Li,Xiaoyu Hu,Zhenghao Chen,Zilun Ding
The excessive use of imidacloprid (IMD) poses a severe threat to human health and ecological stability. This study uniformly anchors MOF808 to the edges of Zn 3 In 2 S 6 nanosheets with sulfur vacancies by introducing EDTA ligands onto MOF808, successfully constructing a MOF808-EDTA/S-Zn 3 In 2 S 6 (MEZ) Z-scheme heterojunction for the efficient degradation of IMD. The presence of sulfur vacancies and interfacial In-O bonds in MEZ facilitates the enrichment of electrons on the S-Zn 3 In 2 S 6 side, thereby enhancing its ability to adsorb and activate oxygen and endowing MEZ with excellent photocatalytic activity. The optimized MEZ achieves a degradation rate of 98.4 % for IMD, with rate constants 5.0 and 76 times higher than those of S-Zn 3 In 2 S 6 and MOF808, respectively. After five photocatalytic cycles, MEZ still retains over 90 % photocatalytic activity, demonstrating the excellent stability of the surface catalyst, which can be successfully applied to the degradation of IMD in actual water. Singlet oxygen, superoxide radicals, and hydroxyl radicals preferentially attack the C7, C9, and N14 sites of IMD, leading to hydroxylation, denitration, ring-opening reactions, and dealkylation. These reactions decompose IMD into smaller products and significantly reduce IMD’s environmental risks. This study proposes an effective strategy to regulate the distribution of metal–organic frameworks on semiconductor surfaces and offers new insights for rationally developing Z-scheme photocatalysts to remove emerging pollutants in environmental remediation.
研究领域:
环境科学
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材料化学
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催化
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纳米技术
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污染控制
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Optical Materials
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2023
·
IF 0
Xiaoya Bu,Yan-gai Liu,Ci’an Xie,Baochen Wang
The long-afterglow luminescent material Sr2MgSi2O7:(Eu, Dy) was combined with the photocatalytic material g-C3N4 to construct a type of Sr2MgSi2O7:(Eu, Dy)/g-C3N4 self-luminous photocatalytic composite. This overcomes the limitation that photocatalytic experiments can only be carried out under an external light source, and it provides a more flexible way to use photocatalytic technology in environmental purification. The morphology, structure, luminescence, and photocatalytic properties of the samples were investigated using a variety of advanced characterization techniques. The results show that the significant improvement in the photocatalytic performance is attributed to the formation of a Z-scheme heterojunction between the luminescent and photocatalytic materials and the promotion of the photocatalytic reaction by the properties of the long-afterglow luminescent material itself. A possible mechanism for the photocatalytic process of the composite is proposed, and it is speculated that the reason for the increased photocatalytic activity is internal electron transfer and electron–hole pair separation based on tests such as X-ray photoelectron spectroscopy and density functional theory calculations. This study provides a strategy for enhancing the photocatalytic activity of photocatalysts and achieving round-the-clock degradation of pollutants.
研究领域:
材料科学
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环境净化
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光催化
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纳米技术
✓ 已验证
DOI
CHEMOSPHERE
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2025
·
IF 8.1
Si-yuan He,Wei Wen,Peng Wu,Zhe Meng
Developing a green and efficient technology for decomposing aflatoxin B 1 (AFB 1 ) and ochratoxin A (OTA) in grains has important theoretical value and application prospects for ensuring food safety. A dual Z-scheme ternary heterojunction photocatalyst, Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ /BiVO 4 /NH 2 -UiO-66 (SBN), was prepared via a self-assembling hydrothermal approach. The SBN heterojunction photocatalyst exhibits round-the-clock photocatalytic activity due to the intrinsic light source of Sr 2 MgSi 2 O 7 : Eu 2+ , Dy 3+ (SMS). Dual Z-scheme mechanism was proposed and validated through detailed analysis of quenching experiments, ESR spectra, band arrangement, and charge transfer processes. The dual Z-scheme mechanism not only promotes the effective transfer and separation of photo generated charge carriers during charge carrier transport, but also maintains significant reduction and oxidation potentials. SBN photocatalyst exhibits stable and persistent photocatalytic performance, significantly enhancing the degradation efficiency of AFB 1 and OTA under all-weather conditions. Experimental data shows that the removal rate of AFB 1 increased from 69.60 % after 60 min of illumination to 83.9 % after 4 h of turning off the light source; At the same time, the removal rate of OTA increased from 64.8 % to 78.1 %. •O 2 − and •OH were identified as key active species in photocatalytic reactions. Based on the analysis of AFB 1 and OTA degradation intermediates and the prediction of degradation sites using density functional theory (DFT), degradation pathways for AFB 1 and OTA were proposed. Collectively, these findings suggest a highly promising practical approach for the detoxification of mycotoxins in grain commodities.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Decai Yang,Yongqi Li,Fuhua Mao,Chao Qu,Lanyang Wang,Youguo Luo,Kexin Shi,Qing Ye
Recently, a visible-light-driven photocatalysis coupled peroxydisulfate (PDS) activation system was developed for improving the efficiency of antibiotics degradation in wastewater. A Z -scheme FeOOH/CNNS photocatalyst was successfully applied for tetracycline (TC) degradation. In this study, graphene oxide (GO) was introduced into the fabrication procedure of the former catalyst. The optimzed FeOOH/GO/CNNS photocatalyst achieved 98.8 % TC degradation within 40 min (k = 0.0964 min −1 ), which was 2.58 and 8.53 times compared to FeOOH/CNNS and CNNS, respectively. This significant improvement can be attributed to the fact that 2D porous CNNS and GO can increase the surface area and active sites, avoiding FeOOH aggregation. Next, narrow-bandgap FeOOH improves visible-light utilization, while GO acts as an interfacial bridge to form an all-solid-state Z -scheme heterojunction, accelerating carrier separation and inhibiting recombination. Finally, radical trapping confirms • O 2 − , • OH, SO 4 •- , and h + synergistically degrade TC. This design provides a novel strategy for PDS-based efficient photocatalytic advanced oxidation.
研究领域:
环境科学
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光催化
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材料科学
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水处理
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Di Wang,Yingying Zhu,Jinze Li,Wensheng Yang,Yulin Zhao,Geng Chen
Carbon nitride (g-C 3 N 4 ) photocatalysts face significant challenges in environmental water remediation, including limited visible light absorption, severe charge recombination, and slow charge transfer. To address these limitations, we developed a Z-scheme Ni-C 3 N 4 /P-C 3 N 4 heterojunction using an efficient and environmentally friendly ball milling method. Compared to g-C 3 N 4 , P-C 3 N 4 , and Ni-C 3 N 4 , the Ni-C 3 N 4 /P-C 3 N 4 heterojunction demonstrated significantly enhanced photocatalytic activity, achieving 99.1% and 86.8% degradation of tetracycline (TC) and rhodamine B (RhB) within 60 minutes, respectively. The total organic carbon (TOC) removal efficiencies were 78.2% for TC and 71.8% for RhB. This enhanced activity is attributed to the optimized heterojunction components and the tightly coupled heterojunction interface, which improve charge transfer and promote efficient separation of photogenerated carriers. Radical scavenging experiments and electron spin resonance (ESR) analysis revealed that holes (h⁺), hydroxyl radicals (·OH), and superoxide radicals (·O 2 − ) all synergistically contribute to the degradation process, with ·O 2 − being the dominant active species. Additionally, toxicity assessment of the degradation products confirmed the environmental safety of the photocatalytic process. This study provides a promising strategy for photocatalytic water purification and offers valuable insights into the design of heterojunction materials.
研究领域:
环境科学
·
材料科学
·
化学工程
·
光催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）