Journal of Energy Chemistry
·
2017
·
IF 2.594
Qingyong Li,Guorong Duan,Jie Luo,Xiaoheng Liu
In this study, the Ag/AgCl/WO 3 plasmonic Z-scheme photocatalysts with different contents of Ag/AgCl nanoparticles (NPs) were prepared through a facile ultrasonic precipitation method in geothermal water , wherein the geothermal water served as the chlorine source. Then the photocatalytic activity was investigated by degradation of 4-Aminobenzoic acid (4-ABA) under visible-light irradiation. It was found that the as-prepared 50 wt% Ag/AgCl/WO 3 photocatalyst showed the highest photocatalytic efficiency with 25.12 and 3.53 times higher than those of pure WO 3 and Ag/AgCl, respectively. The active species trapping experiments indicated that h + and ·O 2 − were key factors in 4-ABA photodegradation process. The possible plasmonic Z-scheme photocatalytic mechanism of photocatalytic reaction for 4-ABA degradation was proposed based on systematical characterizations. We hope this paper could give new ideas for further exploiting geothermal energy to design and fabricate highly efficient visible-light-driven photocatalysts for environmental remediation.
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2021
·
IF 3.08
Jianhe Tang,Yu Liu,Yitong Lin,Xueke Liu,Liang Chen,Congcong Piao,Dawei Fang,Jun Wang
Photocatalysis technology is an effective way for converting nitrate (NO 3 − ) and sulfite (SO 3 2− ) in wastewater to pollution-free nitrogen (N 2 ) and exploitable ammonium sulfate ((NH 4 ) 2 SO 4 ). In this study, three novel photocatalysts , Z-scheme (Cu,Cu)/g–C 3 N 4 –(Cu,Cu)-WO 3 (002), Z-scheme (Cu,Ag)/g–C 3 N 4 –(Cu,Ag)-WO 3 (002) and Z-scheme (Cu,Ru)/g–C 3 N 4 –(Cu,Ru)-WO 3 (002), were prepared by photo-assisted electrostatic self-assembly method. The prepared photocatalysts are synthetically characterized by XRD , SEM, TEM, EDX , XPS , DRS, PL , TPR and EIS . The effects of different co-catalyst combinations on the activity and selectivity of the photocatalysts are evaluated. Also, the impacts of simulated solar light irradiation time, NO 3 − initial concentration and cycle times on the conversions of NO 3 − and SO 3 2− are studied. The results display that the Z-scheme (Cu,Ag)/g–C 3 N 4 –(Cu,Ag)-WO 3 (002) photocatalyst can selectively convert NO 3 − to N 2 , while the Z-scheme (Cu,Ru)/g–C 3 N 4 –(Cu,Ru)-WO 3 (002) photocatalyst can selectively convert NO 3 − to NH 4 + . Nevertheless, the Z-scheme (Cu,Cu)/g–C 3 N 4 –(Cu,Cu)-WO 3 (002) photocatalyst has hardly selectivity for conversion of NO 3 − . These three photocatalysts all exhibit relatively strong capabilities for converting SO 3 2− to sulfate (SO 4 2− ) due to the existence of the highly active (002) plane of WO 3 . Finally, the possible mechanisms on the photocatalytic conversions of NO 3 − and SO 3 2− caused by Z-scheme (Cu,M)/g–C 3 N 4 –(Cu,M)-WO 3 (002) (M = Cu, Ag and Ru) photocatalysts are proposed.
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Zhiyuan Liu,Shiying Fan,Xinyong Li,Zhaodong Niu,Jing Wang,Chunpeng Bai,Jun Duan,Moses O. Tadé,Shaomin Liu
We demonstrate a composite photocatalyst for nitric oxide conversion, which consists of the Cu–Fe alloy and the Z-scheme of graphitic carbon nitride (g-C3N4) and ZnIn2S4, and the excellent photocatalytic performance is 6.45-fold that of g-C3N4. Time-resolved photoluminescence confirmed the delay effect on the charge recombination. Transient absorption spectroscopy indicated that the heterojunction establishment was mainly due to the hole-trapping ability of ZnIn2S4. The combined effects of the Cu–Fe alloy were confirmed by the NO-specific adsorption and conversion experiments. The involved active species was examined via electron spin resonance. The density functional theory calculations revealed the molecular mechanisms of photocatalytic conversion of NO to NO3–. Therefore, g-C3N4|ZnIn2S4|CuFe has the potential to help meet the challenges in sustainable and efficient pollutant conversion.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Liping Zhang,Guohong Wang,Zhenzhong Xiong,Hua Tang,Chuanjia Jiang
A combined hydrothermal-calcination approach is developed to synthesize hierarchical β -Bi 2 O 3 /g-C 3 N 4 direct Z-scheme photocatalyst with enhanced visible light photoactivity for Rhodamine B (RhB) degradation. First, Bi 2 O 2 CO 3 microflowers were hydrothermally prepared using Bi(NO 3 ) 3 ·5H 2 O as feedstocks, and then a series of β -Bi 2 O 3 /g-C 3 N 4 direct Z-scheme photocatalysts were synthesized via a facile calcination method using Bi 2 O 2 CO 3 and g-C 3 N 4 as precursors. The samples were systematically characterized by various characterization technologies including X-ray diffraction, scanning and transmission electron microscopes, Fourier transform infrared spectroscopy and N 2 absorption-desorption equipment. It was found that the g-C 3 N 4 content in the precursors played a key role in affecting the photocatalytic activity of the final products. The β -Bi 2 O 3 /g-C 3 N 4 heterojunction exhibited higher photocatalytic activity than single active components ( β -Bi 2 O 3 and g-C 3 N 4 ), indicating the presence of a synergistic effect between two active components in β -Bi 2 O 3 /g-C 3 N 4 heterojunction. Among all as-prepared catalysts, the 70 wt.% g-C 3 N 4 /Bi 2 O 2 CO 3 exhibits the highest activity for RhB degradation, and the apparent reaction rate constant k (42.2 × 10 −3 min −1 ) is 3.1 and 1.7 times as high as that of pure β -Bi 2 O 3 (13.5 × 10 −3 min −1 ) and g-C 3 N 4 (25.2 × 10 −3 min −1 ), respectively. The enhanced photocatalytic performance of β -Bi 2 O 3 /g-C 3 N 4 heterostructure photocatalysts is mainly due to the high surface area, closely contacted interfaces between the β -Bi 2 O 3 and g-C 3 N 4 component, and the formation of direct Z-scheme structure in the β -Bi 2 O 3 /g-C 3 N 4 composites.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yuanrong Zhang,Shuaitao Li,Xun Hu,Yanfen Fang,Ran Duan,Qifeng Chen
The construction of heterointerface in photocatalyst is an efficient approach to boost the separation and utilization efficiency of charge carriers, which is challenging and crucial in photocatalysis. Here, the construction of melon-structured carbon nitride/ N -doped WO 3 (MCN/NW x ) heterojunction photocatalyst was achieved by a method of prealcoholysis combined with thermal polymerization, where N -doping of WO 3 was achieved in-situ in the formation of heterojunction. The promoted charge separation efficiency was realized through the charge transfer from the conduction band of N -doped WO 3 to the valence band of the MCN. Density functional theory calculation results showed that the formation of the W–N heteroatom-interface led to the increase of density of states at the heterointerface and decrease of the band gap. The MCN/NW x nanocomposite featured a metallic band structure of the nanocomposite photocatalysts, resulting in the enhanced photocatalytic activity . The photocatalytic hydrogen evolution activity of the MCN/NW 2 was enhanced about 2.5 times than that of MCN. This research provides a novel insight into the construction of a novel heteroatom-junction that boosts the separation efficiency of charge carriers, and thereby improves the photocatalytic activity.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Yi Xiao,Xueqin Tao,Ganhua Qiu,Zhifeng Dai,Peng Gao,Benxia Li
Constructing Z-scheme photocatalysts is an effective approach to enhance the conversion efficiency of solar to chemical energy. Herein, W 18 O 49 /g-C 3 N 4 heterostructures have been synthesized by growing W 18 O 49 ultrathin nanowires on g-C 3 N 4 nanosheets via a convenient solvothermal process. Various characterizations were performed on the materials to understand the structure-performance relationship. The photocatalytic properties of the W 18 O 49 /g-C 3 N 4 heterostructures were evaluated by the two oxidation reactions, phenol degradation and oxidative N C coupling of benzylamines , under a simulated sunlight (360 ≤ λ ≤ 780 nm). With tuning the W 18 O 49 /g-C 3 N 4 mass ratio, the optimal photocatalyst of W 18 O 49 (30)/g-C 3 N 4 containing 30 wt% W 18 O 49 nanowires exhibited the highest activity in both the photocatalytic reactions. The generations and contributions of the active species in the photocatalytic reactions were identified by electron spin resonance (ESR) spectra and active-species-eliminating experiments. Accordingly, the photocatalytic mechanism of W 18 O 49 /g-C 3 N 4 heterostructures has been expounded based on the direct Z-scheme electron transfer between the two semiconductors as well as the synergistic actions of active sites on W 18 O 49 nanowires and g-C 3 N 4 nanosheets . This work demonstrates a rational paradigm to construct 1D/2D semiconductor heterostructures and provides further insights into Z-scheme photocatalytic mechanism for boosting solar-driven pollutant degradation and organic transformation.
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2021
·Vol. 50
·期 12
·6772-6783
·
IF 1.938
Hou Xiaoshuo,Yang Ming,Yu Hui,Yang Ying,Li Dan,Dong Xiangting
In this work, a 3D Z-scheme photocatalyst Ag/AgBr/Zn 3 V 2 O 7 (OH) 2 ·2H 2 O (Ag/AgBr/ZVO) was synthesized by a hydrothermal method, and a subsequent surface deposition-optical reduction technique. The prepared flower-like Ag/AgBr/ZVO was characterized by scanning election microscopy (SEM), x-ray powder diffraction (XRD), x-ray photoelectron spectroscopy (XPS), UV-vis spectrophotometry, N 2 adsorption-desorption isotherm based on Brunauer-Emmett-Teller (BET) theory, and electrochemical tests. The photocatalytic degradation performance of the catalyst was investigated by the degradation of methylene blue (MB) dye by visible light irradiation. Compared with bare Zn 3 V 2 O 7 (OH) 2 ·2H 2 O (ZVO) nanoflowers, the photocatalytic effect of the 3D Z-scheme heterojunction Ag/AgBr/ZVO was significantly enhanced. The catalyst of 2h-Ag/AgBr/ZVO exhibited the strongest photocatalytic activity, of which the MB degradation rate is about 98.8% in 100 min, which was about five times that of pure ZVO. The increase in the photodegradation rate is ascribed to the accelerated interface charge-transfer process, the faster photogenerated carrier separation rate and the enhancement of visible light absorption. In view of the trapping of the reaction intermediate and the electron spin resonance (ESR) measurement, we propose a possible Z-scheme photocatalytic mechanism. This improved visible-light response likely originates from a synergistic effect of the different components. This work offered an ideal method for producing stable, efficient, and recyclable photocatalysts suitable for use in the visible light range.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Xi Tang,Yilin Wang,Zhifang Liu,Maoheng Fei,Ronghuan Gao,Yixi Xie,Xiayi Hu,Pengcheng Zhao,Junjie Fei
Characterized by high toxicity and difficult degradation, m-nitrophenol (3-NP) is an environmental pollutant that endangers the environment and biological systems. Therefore, the development of analytical techniques for the detection of low concentrations of 3-NP is critical for the environment and human health. In this work, spherical CdIn 2 S 4 and tiny ZnS particles were prepared by a hydrothermal method , and the Z-type ZnS/CdIn 2 S 4 heterojunction material was obtained by ultrasonically assembling ZnS onto CdIn 2 S 4 . The Z-type ZnS/CdIn 2 S 4 heterojunction possesses a better photocurrent response and a good electron transport capacity, and it can efficiently separate the photogenerated electron-hole pairs. Therefore, a photoelectrochemical sensor for accurate detection of 3-NP in water was constructed based on the Z-type ZnS/CdIn 2 S 4 heterostructure. The sensor has a detection range from 5 × 10 −12 M to 1 × 10 −8 M and an extremely low limit of detection (1.28 ×10 −12 M), which is rare among other sensors. Meanwhile, the sensor showed excellent performance in real samples, indicating that it can effectively monitor 3-NP in real water samples. The validation of the sensor using UV–visible spectra also yielded satisfactory results.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Ning Li,Haikuan Fan,Yanjie Dai,Jing Kong,Lei Ge
The efficient utilization of solar light with UV–Vis-NIR spectrum in photocatalytic hydrogen process is a great confusion to explore, towards achieving high-efficient solar-to-fuel conversion. Herein, we firstly endow CdS a full-spectrum photocatalytic H 2 ability by coupling with a full-spectrum absorption material Cs 0.33 WO 3 (CWO). The CWO/CdS photocatalyst reveals the full spectrum photocatalytic ability to produce H 2 of 2648 μmol g −1 h −1 under the full spectrum, 708 μmol g −1 h −1 under visible light, which is 10 times as high as that of pure CdS nanoparticles under visible light, and 16 μmol g −1 h −1 under NIR spectrum (λ > 800 nm). Meanwhile, the composite selectively utilizes solar light: 708 μmol g −1 h −1 under λ > 420 nm and 25 μmol g −1 h −1 under >520 nm, demonstrating the main functional region of visible light is at 400–520 nm, supported by the down and up conversion of the PL analysis. By combining with the analysis, the excellent activity of hydrogen evolution is attributed to the synergistic effect of a z-scheme heterojunction and the localized surface plasmon resonance (LSPR) of CWO. This work has put forward a novel Z-scheme heterostructure for constructing high-efficient photocatalyst towards providing a new heterostructure combination and opens an insight on the usage of different solar region.
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Ximei Hu,Xiaoqi Chen,Jinlan Li,Jiawei Zhou,Xiaohua Zhu,Meiling Liu,Ying Liu,Youyu Zhang,Yang Liu
Amyloid-beta peptide (Aβ) is considered a promising biomarker for the diagnosis of Alzheimer’s disease (AD). Herein, we developed an anti-fouling photoelectrochemical (PEC) immunosensor for sensitive Aβ40 detection based on Z-scheme heterojunction poly (3,4-ethylenedioxythiophene) (PEDOT)/ZnIn 2 S 4 and zwitterionic peptide. Due to the excellent electrical conductivity of PEDOT, the Z-scheme PEDOT/ZnIn 2 S 4 heterojunction exhibited a high photocurrent response, which can promote the separation and transfer of photogenerated electron/hole pairs. The zwitterionic peptide with hydrophilicity and electrical neutrality was used as a blocking agent to reduce nonspecific adsorption. The proposed PEC immunosensor showed outstanding performance for Aβ40 with high selectivity, stability, wide liner range (from 10 pg mL −1 to 5 ng mL −1 ), and a low detection limit (4.7 pg mL −1 ). Moreover, the integration strategy of heterojunction with zwitterionic peptide provides a promising way for protein detection in practical applications.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Haijun Chen,Chunli Kang,Shiyi Zhao,Zhuowen Wang,Haiyang Liu,Deming Dong,Jiao Qu,Na Zheng,Xiuyi Hua
Ineffective separation of photo-carriers and slow photoreaction rates seriously limit the decontamination effectiveness of the photocatalyst. To overcome these limitations, herein, the oxygen vacancies modified Z-scheme Ag 3 PO 4 /FeSnO(OH) 5 heterojunction was designed with FeSnO(OH) 5 as a co-catalyst. In this photosystem, Ag 3 PO 4 and FeSnO(OH) 5 function as oxidation and reduction centers of Ag 3 PO 4 /FeSnO(OH) 5 photocatalysts, respectively. Importantly, oxygen vacancies in the Z-scheme heterojunction provide an effective charge transport pathway, which not only inhibits the photocorrosion of Ag 3 PO 4 but also reduces electron-hole recombination, significantly boosting the photocatalytic decontamination performance and long-term stability of the Ag 3 PO 4 /FeSnO(OH) 5 photocatalyst. Remarkably, the Ag 3 PO 4 /FeSnO(OH) 5 photocatalyst demonstrated outstanding photocatalytic performance, 100 % degrading indomethacin (IDM) under visible light in just 30 min through the main generation of h + that attacks the active atoms of IDM, prominently outperforming other counterparts. Besides, three principal degradation pathways were proposed, and the toxicity of the degradation products was significantly reduced. The Ag 3 PO 4 /FeSnO(OH) 5 exhibited high photocatalytic degradation efficacy across different qualities of water. This research offers an oxygen vacancy modified engineering combined with a Z-scheme heterojunction strategy for constructing extraordinary photocatalysts for environmental purification.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Zixun Fang,Yao Zhou,Yang Yang,Yidong Hou,Can Yang,Jinshui Zhang
Artificial Z-scheme photocatalytic systems, inspired by natural photosynthesis, have been widely employed for pollutant removal. In this study, we fabricated a ternary Z-scheme Bi 2 O 3 /Bi/porous carbon nitride (PCN) heterojunction with an intimately coupled interface through a simple EG-assisted solvothermal approach to improving photocatalytic performance of NO oxidation. The in-situ generated metallic Bi acts as an electron mediator, effectively accelerating the separation and transfer of photoexcited carriers. The unique Z-scheme charge transfer mechanism provides the strong redox abilities and isolates the active sites for specific reactions, thus promoting photocatalytic NO oxidation activity. As a result, the optimized Bi 2 O 3 /Bi/PCN sample achieved a NO removal efficiency of 94.6%, outperforming single-component catalysts and most previously reported heterojunction-based photocatalysts. Additionally, in-situ Fourier transform infrared spectroscopy was employed to propose the NO removal mechanism, offering valuable insight into the conversion pathway. Such a heterogeneous Z-scheme photocatalytic system with a strong redox ability, high charge-separation efficiency, and long-term stability, demonstrates significantly enhanced photoactivity for pollutant removal and is expected to attract increasing interest for other photocatalytic applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）