APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Ying Du,Linfei Li,Yanting Tang,Juan Li,Quanhui Guo,Guikuan Yue
With the production and application of antibiotics, the generated substandard antibiotic wastewater has brought unprecedented damage to the environment and finally the health of human beings. To alleviate this problem, photocatalytic degradation was proposed, and various catalysts have been developed with high efficiency and low cost. Herein, a novel 0D/3D/2D dual Z-heterojunction photocatalyst CdS QDs/Bi 2 WO 6 /g-C 3 N 4 was constructed by in-situ growth method in order to efficiently degrade multiple antibiotic pollutants. The combination of multi-dimensional materials is more conducive to the close contact between materials and the effective transport of photogenerated carriers. Results reveal that the sample of 75 %CdS QDs/Bi 2 WO 6 /g-C 3 N 4 (denoted as 0.75CSBC) showed the best degradation activity and stability for tetracycline (TC), and the degradation rate could reach 80.83 % within 12 min under visible light irradiation. Based on the detailed analysis of the results from free radical trapping experiment, Mott-Schottky test and liquid chromatography-mass spectrometry (LC-MS) test, the photocatalytic degradation mechanism and pathway were proposed. Besides, 0.75CSBC showed excellent degradation activity for levofloxacin (LVFX), oxytetracycline hydrochloride (OTC) and norfloxacin (NFLX), confirming its good universality. The multi-dimensional dual Z-heterojunction photocatalyst not only provides more active sites but also promotes the efficient migration of photogenerated charge, together with an excellent stability, indicating its wide practical application in the field of photocatalytic wastewater treatment. This work also provides an interesting method for the preparation of multi-dimensional heterogeneous catalysts.
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2017
·
IF 0
Zepeng Qu,Yang Rong,Liang Tang,Xiaoqing Shu,Xudong Liu,Zhaohong Zhang,Jun Wang
A new visible-light-induced Z-scheme photocatalytic system, Er 3+ :Y 3 Al 5 O 12 /(MoS 2 /NiGa 2 O 4 )-(BiVO 4 /PdS), is designed and prepared by using hydrothermal and mixed-calcination methods And the prepared samples are characterized by X-ray diffractometer (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared (FTIR) and UV–vis absorption spectra. The photocatalytic activity is evaluated towards Orange G degradation with simultaneous hydrogen evolution under visible-light irradiation. The photocatalytic experiments indicate that the Er 3+ :Y 3 Al 5 O 12 /(MoS 2 /NiGa 2 O 4 )-(BiVO 4 /PdS) as photocatalyst displays very high photocatalytic activity. It can be ascribed to two sides. One is the use of Er 3+ :Y 3 Al 5 O 12 offering ultraviolet-light to activate the wide-band gap NiGa 2 O 4 . Another is the construction of Z-scheme system between NiGa 2 O 4 and BiVO 4 which can result in a more efficient separation of photoexicited charge carriers, thus endowing it with much powerful oxidation and reduction capabilities. Moreover, the reusability study shows that the prepared photocatalyst can be effectively recycled for three repetitive cycles without an apparent deactivation. In addition, the possible Z-scheme mechanism of Er 3+ :Y 3 Al 5 O 12 /(MoS 2 /NiGa 2 O 4 )-(BiVO 4 /PdS) is also proposed, and further evidenced by photoluminescence (PL) spectra. The present work not only designs a new photocatalytic system but also well applies in photocatalytic degradation of refractory pollutant with simultaneous hydrogen evolution.
✓ 已验证
产品关联
DOI
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zijie Xiao,Hongtao Shi,Caipeng Wang,Qishi Si,Pengrui Jin,Rujing Wei,Baiqin Zhou,Yongmei Wang,Wenqian Wang,Bart Van der Bruggen,Nanqi Ren,Xiaochi Feng
Photocatalytic disinfection is of great interest due to its high environmental sustainability and low energy cost. However, the roles of catalyst structure and oxidation pathways in cell inactivation remain still unclear. Herein, flower-like BiOCl/BiOI was structured for photocatalytic Escherichia coli ( E. coli ) extermination, highlighting the roles played by the Z-scheme heterojunction and reactive oxygen species (ROS) regulation. The hydroxyl radicals generated by BiOCl was successfully combined with superoxide radicals and singlet oxygen generated by BiOI in BiOCl/BiOI structuring. Such a synergistic effect was optimized by ratio of Cl: I = 1: 1, which eliminated the E. coli most efficiently, achieving complete and recyclable disinfection (over 99 %) in 30 min. The cell inactivation was achieved jointly by intracellular ROS accumulation, the cell membrane damage, and inhibition of membrane repair. The oxidative stress from ambient ROS was conducted to intracellular imbalance, exceeding the capacity of intracellular regulation. These results confirm that the synergistic effect of ROS can be regulated to reach the optimal ambience for killing bacteria, analyze the mechanism of cellular disturbance in photocatalytic disinfection. This work connected the regulation of photocatalytic effects via different oxidation pathways to the mechanisms of cell deactivation.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Wang Lixiang,Ren Qiang,Wang Xiaoli
Through a facile sol-gel method, a novel Z-scheme heterojunction BTMO was synthesized by combining Bi-modified TiO 2 with oxygen-modified graphitic carbon nitride. Bi serves as an electron mediator in the catalyst, facilitating the transfer of excited electrons to MCN-O. Infrared characterization reveals that the doping of O increases the adsorption of peroxymonosulfate by the catalyst, promoting the reaction between electrons on the conduction band of MCN-O and PMS. The as-prepared BTMO Z-scheme heterojunction significantly improved the degradation rate of trichloroethylene was in BTMO/PMS system. TCE degradation efficiency in BTMO/PMS photocatalytic system could reach 99.8 % within 1 hour. According to the results of electron paramagnetic resonance and quenching experiments, sulfate radical and holes are the main reactive species in BTMO/PMS system. This novel photocatalyst also exhibited excellent durability. This work provides a new method for solving environmental problems through visible light photocatalysis.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Xiaohua Zheng,Chenbin Cai,Shihui Lu,Mengnan Xu,Wei Chen,Fanger Yang
Recently, the photocatalytic degradation of organic pollutants has gained increasing attention because of its high efficiency and lack of secondary pollution; however, problems such as rapid electron–hole recombination affect its degradation efficiency. In this study, a novel dual Z-scheme g-C 3 N 4 /Ag 2 MoO 4 /AgBr heterojunction was successfully prepared using a one-step room-temperature precipitation method, with its photocatalytic activity evaluated by degrading rhodamine B (RhB) and tetracycline hydrochloride (TCH). The composition and surface morphology of the ternary catalysts—characterized using X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Brunauer–Emmett–Teller (BET) tests, and X-ray photoelectron spectroscopy (XPS)—confirmed the successful loading of Ag 2 MoO 4 and AgBr onto g-C 3 N 4 . Catalytic degradation results showed that the ternary catalyst exhibited the best performance at a 40 % mass fraction of AgBr. Moreover, the ultraviolet–visible diffuse reflectance spectra (UV–Vis DRS), photoluminescence (PL), electrochemical impedance spectroscopy (EIS), and transient photocurrent response test results show that the ternary catalyst has excellent optical properties. In addition, the significant improvement in the catalytic performance can be attributed to the effective charge separation of the dual Z-scheme photocatalytic mechanism based on radical trapping experiments, electron spin resonance (ESR) analysis, and energy band analysis. Hence, this study provides a new approach to studying more efficient photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jing Zeng,Wenqin Wu,Xiao Chen,Shenling Wang,Huimin Wu,Ahmed A. El-Kady,Amnart Poapolathep,Alejandro Cifuentes,Elena Ibañez,Peiwu Li,Zhaowei Zhang
As emerging contaminants, microplastics threaten food and environmental safety. Dibutyl phthalate (DBP, released from microplastics) and benzo[ a ]pyrene (BaP, adsorbed on microplastics) coexisted in food and the environment, harming human health, requesting a sensitive and simultaneous testing method to monitor. To address current sensitivity, simultaneousness, and on-site portability challenges during dual targets in complex matrixes, CuCo 2 S 4 /Fe 3 O 4 nanoflower was designed to develop a smartphone-assisted photoelectrochemical point-of-care test (PEC POCT). The carrier transfer mechanism in CuCo 2 S 4 /Fe 3 O 4 was proven via density functional theory calculation. Under optimal conditions, the PEC POCT showed low detection limits of 0.126, and 0.132 pg/mL, wide linearity of 0.001–500, and 0.0005–50 ng/mL for DBP and BaP, respectively. The smartphone-assisted PEC POCT demonstrated satisfied recoveries (80.00%–119.63%) in real samples. Coherent results were recorded by comparing the PEC POCT to GC–MS (DBP) and HPLC (BaP). This novel method provides a practical platform for simultaneous POCT for food safety and environment monitoring.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 22
·5418
·
IF 4.2
Shuo Yang,Tianna Wu,Kaiyue Li,Ping Huang,Wenhui Li,Yuquan Zhuo,Keyan Liu,Ziwen Yang,Donglai Han
With the intensification of the energy crisis and the growing concern over environmental pollution, particularly the discharge of organic dye pollutants in industrial wastewater, photocatalytic degradation of these contaminants using solar energy has emerged as an effective, eco-friendly solution. In this study, we successfully synthesized 2D/2D g-C3N4/BiOI p-n heterojunctions via a simple precipitation method and a high-temperature calcination method. The unique 2D structures of g-C3N4nanosheets (NSs) and BiOI NSs, coupled with the synergistic effect between the two materials, significantly enhanced the photocatalytic degradation performance of the heterojunctions under simulated sunlight. The band structures, as determined by Tauc curves, Mott–Schottky curves and XPS-VB analysis, revealed a Z-scheme charge transfer mechanism that efficiently reduced charge carrier recombination and improved electron–hole separation. The photocatalytic activity of 2D/2D g-C3N4/BiOI p-n heterojunctions for rhodamine B (Rh B) degradation reached 99.7% efficiency within 60 min, a 2.37-fold and 1.27-fold improvement over pristine BiOI NSs and g-C3N4NSs, respectively. Furthermore, the heterojunction exhibited excellent recyclability stability, with the degradation efficiency decreasing by only 1.2% after five cycles. Radical scavenging experiments confirmed the involvement of superoxide radicals (∙O2−) and hydroxyl radicals (∙OH) as the primary reactive species in the degradation process. This work highlights the potential of 2D/2D g-C3N4/BiOI p-n heterojunctions for efficient photocatalytic applications in environmental remediation.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
LuLu Cao,Xianqiang Gao,Yunlei Zhou,Shugang Zhang,Miao Zhang,Huanshun Yin
The advanced structural design of semiconductor photoactive materials is the core element to improve the performance of photoelectrochemical (PEC) biosensors. By constructing a BiOIO 3 @Bi 4 O 5 Br 2 Z-Scheme heterojunction with abundant oxygen vacancies to significantly improve the photoelectric conversion efficiency, a sensitively PEC biosensor for MBD2 detection was designed by combining DNA isothermal cycle double amplification technology. Specifically, the chitosan-modified BiOIO 3 @Bi 4 O 5 Br 2 was modified on the surface of ITO electrode. Methylene blue (MB)-DNA was immobilized on due to the covalent reaction of its carboxyl group with the amino group of chitosan, and the excess amino group was blocked with acetaldehyde. In the absence of MBD2, the cleavage activity of HpaII is inhibited due to the retention of cytosine methylation. which triggers ISDPR and large amounts of single-stranded DNA complementary to MB-DNA was produced. After MB-DNA hybridization, Exo III was triggered to assist the MB-DNA hydrolysis cycle, resulting in the drop of MB, causing a decrease in the photoelectric signal. Conversely, in the presence of MBD2, it removed cytosine methylation, triggering HpaII hydrolysis and inhibiting subsequent reactions, so that the MB connected to the electrode is retained and the photoelectric signal is enhanced. The sensor had a detection range from 0.07 to 500 ng/mL with a detection limit of 0.018 ng/mL (3σ). The study also explores the effects of environmental pollutants on MBD2 activity and validated with molecular docking models, offering insights into epigenetic regulation and environmental health assessments. This work underscores the potential of advanced photoactive materials and heterojunction designs in biosensor applications.
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2025
·
IF 2.8
Huiyang Xv,Huixiang Yan,Wei Li,Yongyi Li,Shuanglong Li,Xiaorui Huang,Bo Wang,Shichao Jiao,Di Lin,Wenxu Zhang
Amidst global energy transition priorities and environmental remediation imperatives, heterointerface-engineered photocatalysts emerge as strategic foci in advanced materials development. In this study, SnS 2 @C 3 N 5 composite with Z-scheme heterojunction structure were prepared using a synergistic strategy of hydrothermal synthesis and electrostatic self-assembly. Systematic characterization and performance tests show its unique energy band matching and interfacial charge transport mechanism promote photogenerated carrier separation thus potentiate the catalytic performance under luminous incidence. The material demonstrates robust photocatalytic performance. In hydrogen production tests, the value reaches 7546 μmol g −1 h −1 , demonstrating an 8.43-fold increase compared to pristine C 3 N 5 . For methyl orange degradation, it achieves 89.7 % removal efficiency within 120 min, being 2.2 times more effective than C 3 N 5 and 4 times higher than SnS 2 . Combined with transient photocurrent , fluorescence spectroscopy and theoretical calculations reveal the charge transfer pathways and reaction kinetics in Z-scheme heterojunctions . These findings provide both theoretical guidance and practical strategies for developing multifunctional photocatalytic materials.
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Hongbin Yu,Danyang Wang,Bin Zhao,Ying Lu,Xinhong Wang,Suiyi Zhu,Weichao Qin,Mingxin Huo
A ternary dual Z-scheme heterojunction photocatalyst composed of Ag 3 PO 4 , AgBr and g-C 3 N 4 was prepared by a facile chemical deposition method. Scanning electron microscope equipped with energy-dispersive X-ray, X-ray diffraction, diffusive reflective spectrophotometry and X-ray photoelectron spectroscopy were carried out to characterize the morphology, element and structure properties of the photocatalysts. The photocatalytic activity was evaluated by the photoelectrochemical tests and the degradation of tetracycline (TC). The results indicated that the composite Ag 3 PO 4 /AgBr-20%g-C 3 N 4 exhibited the best photocatalytic activity in terms of the photocurrent response and the degradation of TC under visible light irradiation. The degradation rate of TC over the ternary photocatalyst was 0.12 min −1 , which was 2.55 and 3.24 times faster than that over Ag 3 PO 4 /AgBr and Ag 3 PO 4 , respectively. During photocatalysis, metallic Ag could be formed and served as the electron transfer mediator to build the dual Z-scheme heterojunction by bridging the recombination of electrons and holes. By this manner, more efficient separation of photo-generated carriers and better redox ability could be obtained, consequently promoting the photocatalytic activity. Additionally, the trapping experiments verified that O 2 − and h + played prominent roles in the photocatalytic processes, while the impact of OH on the removal efficiency was relatively small.
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 37
·22987-22997
·
IF 3.945
Long Shi,Juanqin Xue,Wen Xiao,Peng Wang,Mingyang Long,Qiang Bi
The coal chemical industry generates large amounts of solid waste and volatile organic compounds (VOCs). In this study, the solid waste semi-coke powder obtained in the semi-coke production process was used as a raw material to prepare high-specific surface area semi-coke activated carbon (SAC) by a carbonization and activation process, and a ternary z-scheme heterojunction photocatalyst with high catalytic performance was loaded for synergistic treatment by adsorption and photodegradation to achieve waste treatment with waste. The prepared semi-coke activated carbon has a specific surface area of 619.27 m2 g−1, which can achieve effective adsorption of VOCs. The ternary z-scheme heterojunction photocatalyst BiPO4–BiVO4–g-C3N4 (PVCN) was supported on a semi-coke activated carbon substrate by a one-step sol–gel method. Based on the synergistic effect of adsorption and photocatalysis, the obtained PVCN/SAC material can degrade toluene by 85.6% within 130 minutes under simulated sunlight irradiation, which is 2.43 times that of pure photocatalyst. The rate of degrading toluene can be increased by 4.43 times. Capture experiments showed that superoxide radicals (˙O2−) and hydroxyl radicals (˙OH) were the key active species in the degradation pathway. Even after five cycles, the material maintained 81.6% of the degradation performance. In this work, we deeply investigate the mechanism of semi-coke activated carbon as a matrix for enhancing photocatalytic degradation performance. The findings of this work provide new insights into the efficient degradation of VOCs and provide a good theoretical basis for the development of high-performance photocatalysts.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xintong Yao,Haoran Zhen,Dafeng Zhang,Junchang Liu,Xipeng Pu,Peiqing Cai
Constructing full spectrum photocatalyst is an effective strategy to improve the conversion efficiency of solar energy. In this work, BiOI:Yb 3+ ,Er 3+ /Bi 2 O 4 (BYE/BO) direct Z-scheme heterojunction photocatalysts were successfully synthesized by a fast and simple microwave-assisted hydrothermal method . XRD , XPS , FE-SEM, TEM , PL , DRS, and BET were used to investigate the physical and chemical properties of samples. Compared to pure BYE and BO, as-synthesized BYE/BO samples had significantly improved photocatalytic activity in the degradation of Ciprofloxacin and Rhodamine B when exposed to visible or near infrared light (NIR) light. Among them, 20% -BYE/BO has the best photocatalytic activity , and its NIR-light degradation ratio of Ciprofloxacin is as high as 66 and 103 times that of BO and BYE, respectively. The enhanced photoactivity of as-synthesized BYE/BO heterojunction is attributed to synergistic effects of the upconversion and the direct Z heterojunction . Moreover, capture experiment showed that the·O 2 - and h + were main active species, and the directive Z-scheme mechanism was proposed.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）