APPLIED SURFACE SCIENCE
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2026
·
IF 6.6
Xi Zhu,Zhikun Li,Bolong Liang,Shijie Xing,Hongbin He,Xiliang Li,Shu-Xuan Liang
The continuous contamination of ciprofloxacin (CIP) pharmaceutical residues poses a potential risk to the ecological environment and human health. Using semiconductor materials with optimized heterojunctions for photodegradation is an effective way for the CIP removal. In this study, Fe-ZnO/CdS Z-type heterojunction was synthesized, and used for the photodegradation of organic pollutants. The Fe-doping brought abundant surface oxygen vacancies to ZnO, which could effectively promote interfacial electron transfer. In addition, the valence transition of Fe (II)/Fe (III) could effectively participate in the redox cycle and improve the carrier transfer efficiency. The construction of Z-type heterojunction facilitated the separation of photogenerated carriers, and the photogenerated electrons in the conduction band of CdS reduced oxygen to produce superoxide radicals as the main active radicals. A series of photoelectric characterizations had proved that the introduction of CdS could effectively improve the visible light utilization rate and photogenerated carrier separation efficiency. The Fe-ZnO/CdS system achieved 90.0% degradation efficiency of CIP within 120 min under visible light. Impressively, Fe-ZnO/CdS heterojunction showed practical degradation capability in complex aqueous environments and excellent reusability. This study provided an effective strategy for the design of metal oxide-based photocatalysts and offered a new idea for the removal of drug residual contaminants.
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MICROCHEMICAL JOURNAL
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2026
·
IF 5.1
Jiayuan Zhu,Yin-zhuo Shen,Zheng Wang,Meijuan Zhao,Hongbo Li,Hang Gao,Qin Xu
The development of selective and sensitive sensing platforms is of significance for food safety, pathogen detection, and public health. Herein, we present a novel photoelectrochemical (PEC) sensing platform that integrates molecularly imprinted polymers (MIPs)-target-aptamer sandwich and a nanozyme-driven in-situ Z -scheme heterojunction to enhance selectivity and sensitivity. The MIPs on 96-well plates selectively capture targets 17β-estradiol (E2), one of the hormonally active compounds. The captured targets are then detected via a sandwich structure formed by E2-specific aptamer-conjugated CeO₂@UiO-66 nanozymes, which possess alkaline phosphatase (ALP) activity. The nanozymes catalyze the hydrolysis of sodium thiosulfate, generating H 2 S and triggering the in-situ vulcanization of Bi₂O₃ into Bi₂O₃@Bi₂S₃ Z -scheme heterojunctions. This heterojunction enhances charge separation under illumination, resulting in a target-proportional photocurrent. The resulting sensor exhibits excellent analytical performance for E2, with a low detection limit of 76.2 pM. This innovative strategy integrates MIPs with an aptamer-based sandwich architecture to enhance selectivity, while simultaneously exploiting nanozyme-driven in-situ heterojunction formation for signal amplification, thereby offering a highly efficient approach for sensitive and selective analysis.
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ACS Nano
·
2026
·
IF 16
Yingde Xu,Yifan Wang,Hongwei Bi,Zhonghui Gao,Wence Xu,Hui Jiang,Zhenduo Cui,Yanqin Liang,Shengli Zhu,Yufeng Zheng,Shuilin Wu,Zhaoyang Li
The underlying mechanisms by which heterogeneous interfaces enhance piezoelectric catalytic effects under ultrasonic irradiation, along with their potential biomedical applications, remain poorly understood. In this study, a versatile Z-Scheme nanoplatform by encapsulating the BiO2-x/Ag3PO4 heterojunction within poly(lactic-co-glycolic acid) (PLGA) microspheres (BA@PLGA) was developed for ultrasound-activated deep-lung antibacterial therapy. The Z-scheme heterojunction synergistically integrates piezoelectric and built-in electric fields, achieving 2.2 and 4.7-fold enhancements in piezoelectric (d33) and electromechanical coupling (k) coefficients, respectively. Ultrasonic-induced dynamic modulation of the piezoelectric potential in BiO2-x/Ag3PO4 generated a “carrier-pumping” effect, which enhanced polarized charge migration efficiency and thereby markedly amplified reactive oxygen species (ROS) production. Consequently, with the assistance of trace Ag+, 99.87 ± 0.05% of methicillin-resistant Staphylococcus aureus (MRSA) were effectively eradicated within 15 min in vitro. Prokaryotic transcriptome analysis further revealed that the synergistic effect of ROS and trace Ag+ disrupted the cell envelope and interfered with the core metabolic pathways of MRSA. This ultrasound-activated platform, integrating piezocatalysis and trace Ag+, achieved over 99.9% bacterial clearance rapidly (1.6log superiority over gentamicin) and alleviated inflammation in a MRSA-induced pneumonia, demonstrating considerable potential for combating bacterial infections in deep-seated tissues.
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PubMed
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INORGANIC CHEMISTRY
·
2024
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IF 4.3
En-Ze Deng,Yan-Zhong Fan,Hai-Ping Wang,Yuying Li,Chao Peng,Jiewei Liu
Constructing a Z-scheme heterostructure on a metal–organic framework (MOF) composite with an explicit charge transfer mechanism at the interface is considered to be an effective strategy for improving the photocatalytic performance of MOFs. Herein, an internal electric field (IEF)-induced Z-scheme heterostructure on the ZnIn2S4@NH2-MIL-125 composite is designed and fabricated by a facile electrostatic self-assembly process. Systematic investigations reveal that close interfacial contact and difference in work function between NH2-MIL-125 and ZnIn2S4 enable the formation of the IEF, which drives the Z-scheme charge transfer as revealed by the in situ irradiated X-ray photoelectron spectroscopy (ISI-XPS), photoirradiated Kelvin probe force microscope (KPFM) measurement, electron paramagnetic resonance (EPR) radical trapping experiment, as well as density functional theory (DFT) calculation; meanwhile, directions of the interfacial IEFs are determined. Benefiting from the unique merit of IEF-induced Z-scheme charge transfer, the optimized ZnIn2S4@NH2-MIL-125 composite exhibits significantly enhanced photocatalytic activity for the photoreduction of 4-nitroaniline (4-NA) to p-phenylenediamine (PPD) under visible light irradiation. This work not only provides in-depth insights for charge transfer in the IEF-induced Z scheme heterostructure but also affords useful inspirations on designing the Z-scheme MOF composite to boost the photocatalytic performance.
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ACTA MATERIALIA
·
2023
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IF 9.4
Weijia Guo,Yutian Lu,Zhiyu Ma,Haitao Wu,Zhenxing Yue
Dielectric ceramics with low dielectric loss in the microwave bands are key materials used in fifth/sixth-generation (5G/6G) telecommunication. Exploring the defect behavior and the broadband dielectric response of ceramics is helpful to understand the loss mechanism and develop novel low-loss microwave dielectric ceramics. In this work, Al/Nb was co-substituted for Ti 4+ in Na 1/2 Sm 1/2 TiO 3 (NST) ceramics with a perovskite structure, and the low frequency, microwave and terahertz (THz) dielectric responses were investigated. In different frequency bands, the variations of dielectric loss with substitution amount are inconsistent. The Al/Nb-substitution increases the dielectric loss in the low frequency and microwave bands, while the dielectric loss in the THz band decreases. The changes in dielectric loss are closely related to the lattice defects in Na 1/2 Sm 1/2 Ti 1– z (Al 1/2 Nb 1/2 ) z O 3 (NST- z AN, 0 ≤ z ≤ 0.1) ceramics, which are studied by thermally stimulated depolarization current (TSDC) technique. The dielectric relaxation of the defects including oxygen vacancies ( V O · · ) and defect dipoles leads to the dielectric loss in the low-frequency and microwave bands. The dielectric loss in the THz band is mainly affected by the damping of lattice vibration , which is associate with the defect concentration. This work might provide a considerable reference for the development of low-loss dielectric materials.
研究领域:
材料科学
·
介电材料
·
陶瓷
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微波技术
·
太赫兹物理
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Shengjie Xia,Guanhua Zhang,Zhiyan Gao,Yue Meng,Bo Xie,Hanfeng Lu,Zheming Ni
In this paper, the novel 3D hollow Z-scheme heterojunction photocatalysts based on Bi 2 O 3 and CoAl layered double hydroxides (Bi 2 O 3 @CoAl-LDHs) were prepared for efficient visible-light-driven photocatalytic ammonia synthesis . The synthesized nanohybrid exhibits excellent photocatalytic ammonia synthesis performance (48.7 μmol·L −1 ·h −1 ) and structural stability , which is primarily attributed to the fact that Z-scheme heterojunction significantly enhanced lifetime of photogenerated carriers (6.22 ns) and transfer efficiency of surface photogenerated electrons (72.5%). Strict control experiments and nitrogen isotope labeling results show that nitrogen and hydrogen in the produced ammonia come from nitrogen and water in the reactant respectively. Electron paramagnetic resonance (EPR) experiments and density functional theory (DFT) calculations further reveal that the built-in electric field due to the difference between Bi 2 O 3 and CoAl-LDHs is the key to constructing the Z-scheme heterojunction. In addition, results of partial density of states (PDOS) show that Co in Bi 2 O 3 @CoAl-LDHs composite is the active site for photocatalytic N 2 fixation.
研究领域:
材料科学
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光催化
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纳米技术
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能源化学
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环境科学
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无机化学
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高影响因子
Energy Material Advances
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2022
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IF 0
Ying Luo,Qiaoqi Guo,Jun Xu,Hanghang Zhou,Zheng Wang,Hong He
BaTaO2N with intense visible light absorption has been demonstrated as a promising photocatalyst for Z-scheme overall water splitting, whereas the photocatalytic activity of BaTaO2N is still restricted by strong charge recombination at structural defects. Here, we present the direct growth of BaTaO2N–BaNa0.25Ta0.75O3 solid solution from a lattice-matched BaNa0.25Ta0.75O3 precursor through volatilization of Na species during a nitridation process. This method promotes the direct phase transformation from BaNa0.25Ta0.75O3 to BaTaO2N to inhibit the formation of defect states. As a result, the as-obtained BaTaO2N–BaNa0.25Ta0.75O3 solid solution shows greatly enhanced activity compared to the conventional BaTaO2N, regardless of photocatalytic H2 evolution in the presence of methanol or Z-scheme overall water splitting. This study provides a facile method to construct (oxy)nitride-based solid solution photocatalysts with low defect density for efficient solar hydrogen production from water splitting.
研究领域:
材料科学
·
能源化学
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 19
·1512
·
IF 3.2
Jiang Chaojin,Zhang Yuanyuan,Guan Erbu,Jiang Yuqin,Li Shuaishuai,Xin Yanmei
The development of efficient and economical photocatalysts is the focus of achieving sustainable remediation of water pollution. However, slow photogenerated carrier transfer and insufficient catalytic sites are the main reasons affecting photocatalytic applications. Herein, we developed flake-octahedral BiOBr/MIL-101(Fe) heterojunction catalysts through a facile solvothermal strategy for the degradation of pollutants under visible light irradiation. Scanning electron microscope, X-ray photoelectron spectrometer, Fourier infrared spectrometer, and X-ray diffraction analysis characterizations proved the successful synthesis of flake-octahedral BiOBr/MIL-101(Fe) heterojunction. Absorption spectra and Brunauer–Emmett–Teller analyses showed that the BiOBr/MIL-101(Fe) composites with an atomic percentage of Fe of 9.1 (denoted as BiOBr/MIL III ) had the optimal light absorption and the largest specific surface area. The BiOBr/MIL III achieved a remarkable Rhodamine B (Rh B) degradation efficiency of 94.5% within 60 min, with an apparent rate constant ( k ) of 0.03540 min −1 , demonstrating excellent visible light-driven photocatalytic activity. Photocatalytic mechanistic studies showed that the solvothermal-induced flake-octahedral BiOBr/MIL-101(Fe) III heterojunction promotes the formation of Z-scheme, which significantly enhances the carrier separation efficiency and accelerates the rapid generation of reactive radicals · O 2 − and h + . This work provides a feasible strategy for the construction of flake-octahedral inorganic-MIL photocatalysts with excellent photocatalytic performance.
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PHYSICA B-CONDENSED MATTER
·
2026
·
IF 3.2
Junyu Huang,Di Lin,Wei Li,Bo Wang,Huiyang Xu,Zimo Wang,Yongyi Li,Shuanglong Li,Xiaorui Huang
The PCN/CdS/CdIn 2 S 4 composites exhibit excellent photocatalytic performance for H 2 evolution, H 2 O 2 production and dye degradation. • Spontaneous interfacial band bending drives a dual Z-scheme pathway to preserve highly active photogenerated charge carriers. • The superoxide radicals (.•O 2 − ) is the primary species for both continuous H 2 O 2 generation and rapid pollutant decomposition. Addressing the escalating global energy and environmental crises demands efficient, sustainable, and robust technologies. In this study, a ternary composite PCN/CdS/CdIn 2 S 4 integrating phosphorus-doped carbon nitride (PCN), cadmium sulfide (CdS), and indium cadmium sulfide (CdIn 2 S 4 ) was rationally designed via a multi-step assembly process. The optimized heterojunction exhibits outstanding performance, achieving remarkable H 2 and H 2 O 2 production rates of 7614 and 6873 μmol∙g −1 h −1 , respectively. Additionally, it demonstrates ultra-fast degradation kinetics, mineralizing 99.4% of methyl orange within just 30 min. Mechanistically, spontaneous interfacial band bending drives a dual Z-scheme charge transfer pathway. This specific energy band alignment effectively preserves strongly reducing electrons and highly oxidizing holes while significantly suppressing charge carrier recombination. Furthermore, radical trapping confirms that superoxide radicals (∙O 2 − ) are the pivotal active species, driving a two-step single-electron reduction pathway (O 2 →∙O 2- →H 2 O 2 ) for continuous H 2 O 2 generation, and coupling synergistically with localized holes for rapid organic pollutant decomposition.
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MOLECULES
·
2026
·Vol. 31
·期 16
·2843
·
IF 5.1
Ligang Ma,Tingting Chen,Jingxuan Zhou,Jiulei Zhao,Xinlan Li,Huilin Jiang,Liping Li,Xiaoqian Ai
Organic pollutants in industrial wastewater present a severe threat to both the environment and human health. Photocatalytic technology, recognized for its eco-friendliness and high efficiency, has become a leading approach for degrading such pollutants. In this work, BiOCl nanosheets were first synthesized using a hydrothermal method. Subsequently, an anion exchange reaction with TAA in an oil bath generated a Bi2S3intermediate layer on the BiOCl surface, followed by the in situ growth of ZIS nanostructures, successfully constructing a BiOCl@Bi2S3@ZIS double Z-scheme heterojunction. By adjusting the amount of BiOCl, the interface contact and dispersion of the heterojunction were optimized. Characterization results demonstrate that the BiOCl@ZIS-25 heterojunction possesses the highest specific surface area (103.5 m2·g−1) and the most efficient charge separation. Under visible light irradiation, it achieved 97.88% degradation of methylene blue within 20 min, with a reaction rate constant 8 and 4 times higher than those of pure BiOCl and ZIS, respectively. Mechanistic investigations indicate that Bi2S3interlayer acts as an electron-transfer bridge between BiOCl and ZIS, establishing a double Z-scheme charge transfer pathway that significantly enhanced the separation and utilization efficiency of photogenerated charge carriers. This study offers valuable insights for designing highly efficient and stable photocatalytic composite materials.
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Journal of Materials Chemistry C
·
2026
·
IF 5.1
Meijuan Ding,Mei Li,Ziyu Li,Jingyi Nie,Chaoqi Ding,Aohui Ping,Zhiliang Jin
The rapid recombination of carriers and the low efficiency of solar energy utilization remain major challenges in the field of hydrogen evolution. This study utilised coal tar pitch as a carbon source to synthesise nanocarbon spheres (CS), which were then employed to modify CoAl2O4 nanoblossoms (CAO) and hexagonal CdS, thereby constructing a highly active composite photocatalyst. Activity testing indicates that under visible light irradiation, the photocatalytic hydrogen evolution rate of the 20% CAO–CdS–CS composite material reached a maximum of 43.1 mmol g−1 h−1 within 5 h. Furthermore, its apparent quantum yield (AQY) at 475 nm was 2.5%. The successful construction of this composite material not only significantly enhanced hydrogen evolution performance but also effectively broadened the catalyst's photoresponsive range into the near-infrared region. Characterization and band structure analysis reveal that CAO–CdS forms a Z-scheme heterojunction. CS, acting as a co-catalyst, not only provides abundant hydrogen evolution active sites for the reaction system but also accelerates charge transfer, playing a pivotal role in the photocatalytic process. This study provides valuable insights into the application of coal-based nanocarbon materials in the field of photocatalytic hydrogen evolution.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zujiang Liu,Xuehua Yuan,Tianhao Chen,Chongqing Yu,Luyan Xiong,Zhixuan Zeng,Zeyu Pan,Gnanasekar Sathishkumar,Jing Li,Jin Ye,En-Tang Kang,Liqun Xu,Xi Rao
The escalating levels of indoor bacterial contamination and air pollution considerably threaten public health. In this work, we synthesized a three-dimensional flower-like TiO 2 /g-C 3 N 4 nano-powder with a Z-scheme heterojunction structure, which demonstrated superior photocatalytic performance and efficient free radical generation capability, enabling effective mitigation of bacterial pathogens and indoor volatile organic compounds under low-power light irradiation. The material achieved 100% degradation of formaldehyde within 40 minutes under 420 nm LED irradiation. Antibacterial tests showed a 100% inactivation rate for S. aureus within 60 minutes and complete elimination of E. coli within 40 minutes. Characterizations and DFT calculations had confirmed the establishment of the Z-scheme heterojunction, which significantly decreased the band gap and improves the absorption of visible light. Concurrently, the efficient separation of charge carriers and the transfer of electrons facilitated the production of reactive oxygen species. In conclusion, this research presents a novel and environmentally sustainable approach to developing high-performance photocatalysts for applications in indoor environment improvement.
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