COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Haiping Liu,Jing Liang,Li shao,Jinge Du,Qiancheng Gao,Shuai Fu,Li Li,Miao Hu,Fengying Zhao,Jianguo Zhou
The dual defect mediated Z-scheme MoS 2 /g-C 3 N 4 photocatalyst was fabricated via a simple ultrasonic dispersion and annealing method. The structural, optical and electronic property was systematically characterized. X-ray photoelectron spectroscopy (XPS) analysis demonstrated that the MoS 2 was anchored on the g-C 3 N 4 through strong interface electrostatic interaction , which led to the formation of built-in electric field at the contact interface. The optimized MoS 2 /g-C 3 N 4 heterojunction achieved a superior photoefficiency towards bisphenol A (BPA) degradation and exhibited the reaction rate normalized to specific surface area of 3.22 × 10 −4 g·min −1 m −2 , approximately 10.0 and 6.7 times larger than these of g-C 3 N 4 and MoS 2 , respectively. The origin of the enhanced photocatalytic activity of MoS 2 /g-C 3 N 4 was attributed to the formation of intimate Z-scheme surface heterostructure between MoS 2 and g-C 3 N 4 , thus improved the light-harvesting ability, facilitated fast charge separation and created more active sites. The impact of anionic towards degradation efficiency was investigated. The degradation activity and degree of BPA were investigated by three-dimensional excitation-emission matrix (3D EEM) fluorescence technique. The Z-scheme charge transfer mechanism and the significant contribution of holes (h + ) and superoxide radicals ( O 2 − ) were demonstrated by electron spinning resonance (EPR), radical scavenger experiment and spectral quantification technology. This work could offer a new protocol for the design of highly efficient heterostructure photocatalysts towards environmental remediation.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Na Song,Yuting Zhu,Fan He,Mengnan Zhang,Mingfu Ye,Shengjun Liu,Kui Zhang
HOF/HOF-based Z-scheme heterojunctions were successfully synthesized. • Z-scheme heterojunctions and Cu single atoms boost charge separation. • TCPP(M)-HOF/PFC-1 exhibits the highest H 2 evolution rate of 42.7 mmol g −1 h −1 . Hydrogen-bonded organic frameworks (HOFs) have exhibited extraordinarily broad application prospects in the field of photocatalysis owing to their unique structural merits. Nevertheless, pristine HOF materials generally suffer from the bottleneck of low separation efficiency for photogenerated charge carriers, which severely restricts their practical industrial applications in photocatalysis. To address this issue, herein we have successfully constructed a series of Z -scheme heterojunction photocatalysts based on the two-dimensional HOF/HOF system (denoted as TCPP (H or M)-HOF/PFC-1, where M = Cu, Zn, Ni), with the targeted composite heterostructure fabricated from TCPP(Cu)-HOF and PFC-1 HOF as the core product. Among them, the porphyrin-based TCPP(Cu)-HOF effectively broadens the spectral response range of light absorption for the composite; the precise construction of the Z -scheme heterojunction greatly enhances the separation and transport efficiency of photogenerated charges; meanwhile, the single-atom Cu sites (Cu-SA) can significantly shorten the charge migration pathway and accelerate the directional and rapid transfer of photogenerated electrons, ultimately enabling the efficient conversion of solar energy into chemical energy. Furthermore, the excellent energy level matching between TCPP(Cu)-HOF and PFC-1 HOF in the composite, coupled with the synergistic regulation of single-atom active sites, further facilitates the efficient directional migration of photogenerated charge carriers. Experimental test data confirm that the optimized TCPP(Cu)-HOF/PFC-1 heterojunction photocatalyst delivers a photocatalytic hydrogen evolution rate of up to 42.7 mmol·g −1 ·h −1 . This work fully demonstrates the outstanding advantages of HOF/HOF Z -scheme heterostructures in precisely tailoring photogenerated charge carrier dynamics, providing a novel and feasible research strategy for efficiently boosting photocatalytic hydrogen evolution performance and designing high-performance heterojunction catalysts for solar energy conversion. Here, we present a Z -scheme heterojunction photocatalyst based on two-dimensional HOF/HOF composites, specifically TCPP(M)-HOF/PFC-1 (M = Cu, Zn, Ni), with TCPP(Cu)-HOF and PFC-1 HOF as the representative system. Owing to the favorable energy level alignment between the two HOF components and the introduction of single-atom Cu sites, the directional migration of photogenerated charge carriers is significantly enhanced. Download: Download high-res image (117KB) Download: Download full-size image
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Surfaces and Interfaces
·
2026
·
IF 6
Mengfei Hu,Zhaodong Pan,Xin Zhou,Rui Wang,Jun Jin,Huanwen Wang,Yansheng Gong
Fe ions were incorporated into octahedral sites of palygorskite to achieve lattice reconstruction via a facile hydrothermal route. • A dual Z-scheme heterojunction was constructed in Bi 2 WO 6 /Fe-substituted palygorskite composites for efficient charge separation. • In-situ formed Fe 2 O 3 nanoparticles enhanced visible-light absorption and provided abundant active sites for CO 2 adsorption and activation. • The optimized photocatalyst showed a CO generation rate of 831.26 μmol g −1 h −1 with high selectivity up to 74.82% toward CO. The rational utilization of natural nano-minerals toward high-performance photocatalysts is highly desirable yet challenging. In this work, Fe ions were introduced into the octahedral sites of acid-activated palygorskite (Pal) to realize lattice reconstruction via a thermostatic oil bath-assisted hydrothermal strategy. Bi 2 WO 6 /Fe-substituted Pal (BWO/Fe-Pal) composites were then fabricated by hydrothermal deposition of Bi 2 WO 6 nanosheets on Fe-Pal supports. Fe substitution preserved the basic crystalline structure of Pal while effectively narrowing its band gap. When the Fe mass ratio exceeded 20 wt%, Fe 2 O 3 nanoparticles were in-situ precipitated on Pal surfaces, which strengthened visible-light absorption and provided abundant active sites for synergistic adsorption and photoactivation of CO 2 . The optimized 30FPB-0.3 photocatalyst exhibited a CO generation rate of 831.26 μmol g −1 h −1 , approximately 26.12 times higher than that of pure Bi 2 WO 6 (31.82 μmol g −1 h −1 ). Meanwhile, CO selectivity was significantly improved from 17.6% to 74.82%. Systematic characterizations demonstrated that Fe doping and in-situ formed Fe 2 O 3 modulated the band structure of Pal and increased surface-active sites. Moreover, the hybridization with Bi 2 WO 6 induced the formation of a dual Z-scheme heterojunction, which broadened the photoresponse range and greatly promoted the separation and migration of photogenerated charge carriers. This study provides a green, low-cost, and feasible route for designing efficient mineral-based photocatalysts toward photocatalytic CO 2 reduction. Download: Download high-res image (374KB) Download: Download full-size image
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FOOD CHEMISTRY
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2026
·
IF 10.4
Miao Ding,Qi Zhang,Xian Chen,Zhihong Wang,Kun Ge,Ying Gu
Z-scheme nanozyme with homologous MOF-on-MOF architectures was prepared. • “Electron bridge” role of homologous Cu 2+ in boosting electron transfer. • Z-scheme structure suppressed electron–hole recombination. • POD-like activity was enhanced owing to homologous and Z-scheme structure. • Nanozyme enabled colorimetric detection and elimination of AFB 1 . Mycotoxins are typical contaminants produced by various fungal species, showing significant risks to human health due to their wide distributions and high carcinogenicity. Herein, the homologous heterostructured MOF-on-MOF nanozyme with Z -scheme structure were constructed via surface-initiated strategy by encapsulation of Cu-BDC on HKUST-1 for simultaneous colorimetric analysis and removal of aflatoxin B 1 (AFB 1 ). The homologous Cu 2+ ion plays a pivotal “electronic bridge” role in shortening the electron transfer distance between Cu-BDC and HKUST-1 and enhancing interfacial coupling. The recombination of intrinsic electrons and holes within HKUST-1@Cu-BDC can be suppressed owing to typical Z -scheme structure. These leads to a significant enhancement in peroxidase (POD)-like activity, as confirmed by advanced characterizations and density functional theory (DFT) calculations. Based on this enhanced homologous heterojunction, the indirect detection (HKUST-1@Cu-BDC/ssDNA biosensors) and direct removal (HKUST-1@Cu-BDC nanozyme) methods with limits of detection (LOD) of 0.87 μg/L and maximum removal rate of 79.6% for AFB 1 have been established. Finally, the homologous MOF-on-MOF nanozyme was successfully verified by both detection and removal process in complex food samples, while also demonstrating excellent repeatability and stability throughout the tests. This work provides a versatile strategy in designing and fabricating high-quality Z -scheme heterojunction nanozyme for mycotoxins governance. This study involved the development of an electron-bridge mediated Z -scheme nanozyme with homologous heterostructured MOF-on-MOF architectures (HKUST-1@Cu-BDC) via surface-initiated strategy by encapsulation of Cu-BDC on HKUST-1 for simultaneous colorimetric detection and removal of aflatoxin B 1 (AFB 1 ) two-in-one. Download: Download high-res image (174KB) Download: Download full-size image
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2026
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IF 5.3
Qingqing Zou,Dan Zhou,Shan Mou,Shuixin Ding,Yingjuan Wang,Chunyan Su,Qianchun Zhang
Vanillin is widely used in food and industrial applications, but excessive intake of vanillin can pose health risks. Therefore, the development of novel detection strategies with high sensitivity and selectivity is essential for the accurate identification of vanillin. Ethyl ( Z )-2-cyano-4-oxo-3,4-diphenylbut-2-enoate (ECOD), a novel fluorescent probe, was synthesized by an elimination reaction using ethyl cyanoacetate, benzil, and aqueous ammonia as raw materials. The probe exhibited maximum fluorescence excitation and emission wavelengths at 300 and 340 nm, respectively, with a quantum yield of 22.6%. ECOD was found to have high selectivity and sensitivity for the detection of vanillin. This was attributed to ECOD binding to vanillin, which induced conformational changes and triggered intermolecular charge transfer (ICT), ultimately resulting in fluorescence quenching. Therefore, a fluorescence-based method was established for the quantification of vanillin in biscuits, candy, and milk sauce. The linear detection range was 1.0–100 µM and the detection limit was 0.33 µM. The recoveries ranged from 93.2% to 113%, with an RSD ranging from 2.8% to 10%. These results indicated that ECOD had significant application potential in food analysis, suggesting that the fluorescence method based on ECOD could provide a novel approach for rapid vanillin determination in complex food matrices.
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INORGANIC CHEMISTRY COMMUNICATIONS
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2026
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IF 5.9
Yaxin Yi,Xian Liu,Zizhe Xiong,Bei Liu,Xiangyun Jiang,Lei Zhu,Xun Wang
Using a simple ‘polymer-assisted pyrolysis–co-precipitation’ strategy, a three-dimensional interlocked CeO 2 /g-C 3 N 4 Z -scheme heterojunction structure with a honeycomb-like morphology was successfully fabricated. In contrast to the morphology of conventional composites, morphological and structural characterisation in this study indicates that the thermal cracking strategy of the polymer template causes partial rupture of CeO 2 microspheres to create pores, driving g-C 3 N 4 to interpenetrate, thereby promoting the interweaving of the two to form a three-dimensional interlocked symbiotic network. Its unique structure not only increases the interfacial contact area but also creates smoother mesoporous transport channels, thereby promoting mass transfer processes. This significantly enhances the degradation kinetics in low-concentration systems. The degradation rate constant k for 5 mg/L phenol is 0.036 min −1 , which is up to 4.9 times higher than that in high-concentration systems. XPS and EIS analyses revealed strong interfacial chemical interactions between CeO 2 and g-C 3 N 4 ; this close interfacial coupling effectively reduced charge transfer resistance. Combined with characterisation methods such as ESR, this suggested that the system promotes the separation of photogenerated carriers along a proposed efficient Z -scheme path, thereby continuously generating large amounts of reactive oxygen species (•O—2 and •OH). The optimal 2–1Ce/CN composite achieved a phenol degradation rate of up to 94.5% for a 5 mg/L solution within 75 min, whilst demonstrating excellent cycling stability. This work provides novel mechanistic insights for the design and development of structurally optimised materials for highly efficient photocatalytic environmental remediation.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Mingzhu Yuan,Lei Jiang,Sitian Mao,Wenhong Zhou,Xiangang Lin,Yupeng Yuan
The efficient exploitation of visible light while optimizing the charge migration of the photocatalysts is a critical strategy to achieve a significant enhancement of solar energy conversion efficiency. Herein, a g-C 3 N 4 /WO 3 (P/W-x%) Z-scheme heterojunction photocatalyst was successfully engineered by incorporating unique WO 3 nanocubes into g-C 3 N 4 nanosheets with n-π* electronic transition (PCN). Under visible light irradiation, the optimized P/W-2 % presents excellent photocatalytic activity with the H 2 production rate of 3.82 mmol h −1 g −1 , which is 13.2 and 3.9 times higher than that of BCN and PCN, respectively. The excellent photocatalytic H 2 production performance is attributed to the n-π* electronic transition of the lone electron of the N atoms in g-C 3 N 4 , which enhances the visible light trapping ability. More importantly, In-situ X-ray photoelectron spectroscopy (ISI-XPS) measurement confirms the transport of photo-generated electrons from WO 3 nanocubes to PCN nanosheets. Consequently, a Z-scheme P/W-2 % heterojunction is proposed based on the flow direction of photogenerated electrons in combination with the energy band structure. It not only promotes the rapid separation and migration of photogenerated carriers, but also enhances the reduction capability. This study provides a valuable design idea to enhance the performance of photocatalytic H 2 production via light absorption and charge dynamics.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Guanbin Wen,Bin Zhang,Yingzeng Zhang,Qing Wang,Qianqian Guo,Qisheng Wang,Zhengfang Yang,Xiao Wang,Yushu He,Donghui Yang,Luyun Xu
Photocatalytic antibacterial materials, which kill bacteria by generating reactive oxygen species (ROS) without relying on metal ion components, offer higher safety and environmental friendliness, making them a key focus of current antibacterial research. Traditional photocatalytic materials exhibit limited responsiveness to visible light, and their antibacterial efficacy diminishes when the generation of ROS is suppressed. Therefore, this study developed a g-C 3 N 4 /CdS-Cu Z-scheme heterojunction with strong visible light responsiveness, enabling the generation of alternative ROS when one type is inhibited. The material exhibited excellent antibacterial performance under visible light, with antimicrobial rates of 95.46 % and 95.91 % against E. coli and S. aureus , respectively. Microstructural and photoelectric analyses confirmed that the material possessed a tightly coupled two-dimensional heterostructure with full-spectrum absorption capacity and efficient separation of photogenerated charge carriers. Additionally, density functional theory (DFT) calculations revealed changes in electron transfer pathways and energy band structure, further supporting the proposed antibacterial mechanism. In practical application tests, g-C 3 N 4 /CdS-Cu showed good performance in water treatment. This study on the “ROS compensation” mechanism provides a theoretical basis for the development of advanced photocatalytic antibacterial materials and expands their application range.
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Science China-Materials
·
2026
·
IF 7.7
Chen Jiayue,Zhou Zhou,Luo Weili,Yue Yiying
Recent advancements in sustainable bio-sourced functional materials have focused on enhancing the valorization of lignin-derived biopolymers through innovative transformation methodologies. This study highlights breakthroughs in lignin-based Z-scheme heterojunction photocatalytic systems, emphasizing extended spectral responsiveness, optimized interfacial photoexcited carrier separation and reduced energy loss mechanisms. Two photocatalysts, Bi 2 WO 6 (BWO) and ZnIn 2 S 4 (ZIS) were co-engineered via a Z-scheme charge-transfer pathway using coaxial electrospinning and hydrothermal synthesis with lignin-based carbon nanofibers (CNFs), preserving the fibrous skeleton intact. The all-component photocatalytic nanomembrane exhibited superior mechanical strength (Young’s modulus = 20.38 MPa, toughness = 2.48 kJ/m 3 ) under wet conditions along with accelerated stabilization kinetics (1°C/min, representing a 10-fold increase), resulting in significant energy savings. Using methylene blue (MB) as a model pollutant, the CNFs@BWO/ZIS nanomembrane achieved 94.4% degradation efficiency ( k = 0.01664 min −1 ) after 120 min of solar irradiation, while maintaining excellent recyclability through five successive cycles. Furthermore, we elucidated the systematic mechanism of surface charge-carrier migration in the Z-scheme heterojunction and MB decomposition. This photocatalytic system utilizing sustainable biomass functional materials paves the way for wastewater treatment, with the goal of achieving peak carbon emissions and carbon neutrality. The alternative text for this image may have been generated using AI.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yang Xiao,Qingsong Zhang,Liu Yang,Qingyan Zhang,Xijun Fu,Lin Cheng,Qingyi Zeng
An interfacial Cd S bond modulated hierarchical Z-scheme heterostructure composed by indium vacancies-rich In 2-x S 3 and Cd-rich Cd 1+x In 2-x S 4 (In 2-x S 3 /Cd 1+x In 2-x S 4 ) is rationally designed and fabricated by using MIL-68 (In) as precursor and template, and used for efficient photocatalytic wastewater treatment and CO 2 reduction. The in-situ ion-exchange derived Cd S bond at the heterointerface induced the Z-scheme charge transfer mechanism in hierarchical In 2-x S 3 /Cd 1+x In 2-x S 4 photocatalyst, which is verified by the X-ray photoelectron spectroscopy, electron paramagnetic resonance and density functional theory calculations. Moreover, the hierarchical ultrathin and loose two-dimensional nanosheet structure is conducive to expose more active sites and adsorb more reactants. By integrating the efficient adsorption capacity and Z-scheme mechanism, the In 2-x S 3 /Cd 1+x In 2-x S 4 photocatalyst shows superior photocatalytic CO 2 reduction activity and high removal efficiency of dyes and heavy metal. For example, under visible light illumination, it removed almost 100 % of various dyes within 10 min operation, and reduced 100 % Cr(VI) within 1 h, and it also manifested state-of-the-art production rates of 132.5 and 392.1 μmol h −1 g −1 for CH 4 and CO, respectively, in reducing CO 2 without co-catalyst. A useful inspiration on purposive modulating Z-scheme charge transfer by atomic-level interface engineering was proposed to significantly promote the photocatalytic performance.
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Nanoscale
·
2023
·Vol. 15
·期 6
·2871-2881
·
IF 6.7
Shuanghong Liu,Siyu Xia,Jiefei Wang,Xitong Ren,Sudi Chen,Yong Zhong,Feng Bai
The direct Z-scheme photocatalytic system can effectively improve the separation efficiency of photogenerated carriers through the photosynthesis-based photocarrier transport model. In this study, zinc porphyrin-assembled nanorods (ZnTPyP) and WO3 nanorods’ nanorod-on-nanorod heterojunctions (ZnTPyP/WO3) were successfully prepared through a simple modified acid–base neutralization micelle-confined assembly method using WO3 nanorods as the nucleation template and ZnTPyP as building blocks. ZnTPyP achieved a controllable assembly onto WO3 nanorods through N–W coordination. ZnTPyP/WO3 nanorod-on-nanorod heterojunctions exhibited a structure-dependent photocatalytic performance for hydrogen production. The ZnTPyP/WO3 nanorod-on-nanorod heterojunctions exhibited a optimal hydrogen production rate (74.53 mmol g−1 h−1) using Pt as the co-catalyst, which was 2.64 times that of the ZnTPyP self-assembled nanorods. The improvement in the photocatalytic hydrogen production efficiency could be mainly attributed to the direct Z-scheme electron-transfer mechanism from WO3 to ZnTPyP. This is the first report of an approach using porphyrin-assembled nanostructures to construct organic–inorganic Z-scheme photocatalysts. This study offers valuable information for preparing new efficient photocatalysts based on organic supramolecular orderly aggregate materials.
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PubMed
高影响因子
PEST MANAGEMENT SCIENCE
·
2023
·Vol. 79
·期 6
·2005-2016
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IF 4.1
Zhen Tian,Ruichi Li,Shichang Cheng,Tong Zhou,Jiyuan Liu
BACKGROUND Mythimna separata is a notorious pest causing crop damages at the larval stage. Gaining insight into larval olfaction mechanisms would provide knowledge for olfaction-based management of M. separata larvae. RESULTS In the present research, ( Z )-11-hexadecenal ( Z 11-16: Ald), a major component of M. separata sex pheromone, was found to attract early-instar larvae of M. separata in a food context. Using a fluorescent binding assay, we found that M. separata general odorant binding protein 2 (MsepGOBP2) exhibited high binding affinity to Z 11-16: Ald. Further, silencing of MsepGOBP2 resulted in a sharp reduction of the response to Z 11-16: Ald, which could not be mitigated by increasing the concentration of Z 11-16: Ald. Additionally, we employed molecular dynamics-based approaches to unravel the interaction details between MsepGOBP2 and Z 11-16: Ald, specifically the binding of Z 11-16: Ald to MsepGOBP2. CONCLUSION Z 11-16: Ald is attractive to early-instar larvae of M. separata , and MsepGOBP2 is identified to be indispensable in the larval detection of Z 11-16: Ald. These results could aid in the development of olfaction-based methods for controlling M. separata in the larval stage. © 2023 Society of Chemical Industry.
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高影响因子
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