ACS Applied Nano Materials
·
2024
·
IF 5.3
Yu Yao,Qianhong Shen,Qifeng Chen,Yanyan He,Libei Jiang,Jie Liu,Yue Li,Xudan Cao,Hui Yang
A silver phosphate (Ag3PO4)/silver (Ag)/silver halide (AgX, X = Cl, Br, or I) ternary composite photocatalysts were prepared by loading Ag nanoparticles on Ag3PO4 tetrapods followed with in situ halogenation. The interface charge transfer behavior in the Ag3PO4/Ag/AgX nanocomposite was studied, and the photocatalytic performance was also evaluated. The results show that the Ag3PO4/Ag/AgI photocatalyst exhibits higher photocatalytic activity than the other two photocatalysts due to the more matched band structure between AgI and Ag3PO4. An internal electric field (IEF) from Ag3PO4 to AgI is formed at the heterogeneous interface, so the photogenerated electrons at the conduction band of AgI can rapidly transfer to the valence band of Ag3PO4 and recombine with photogenerated holes, which is consistent with the S-scheme charge transfer mechanism. Meanwhile, the photogenerated electrons left at the conduction band of Ag3PO4 can transfer to Ag nanoparticles due to the Schottky junction and react with oxygen to produce •O2–, which is proved to be the main active species in the photocatalytic procedure. This tandem junction modulated between the S-scheme heterojunction and Schottky junction promotes the efficient separation of photogenerated carriers, thus significantly increasing the average PL lifetime of electrons by 2.95 times. Therefore, the Ag3PO4/Ag/AgI photocatalyst exhibits excellent photocatalytic activity for the degradation of methylene blue and norfloxacin. The seven consecutive cyclic tests prove the good stability of the photocatalyst, thus showing the application potential in the field of sewage treatment.
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 16
·5205-5218
·
IF 4.174
Xiaoyi Chen,Xiuling Xue,Xiuwen Gong
A number of porous g-C3N4 nanosheet/Ag3PO4/NCDs (PCNNS/AP/NCDs) with little amounts of Ag3PO4 were synthesized via an in situ sedimentation–calcination method. The PCNNS/AP/NCDs photocatalyst exhibited excellent photocatalytic performance for the photocatalytic degradation of tetracycline (TC) under visible light irradiation at a removal rate of 90.5% in 40 min. The study of the reaction kinetics of the as-prepared samples was in accordance with the pseudo-second-order kinetics, with the correlation coefficient (R2) being greater than 0.9776. Meanwhile, the photocatalyst was capable of degrading ciprofloxacin (CIP), and showed good performance even under actual water conditions with natural sunlight irradiation, indicating that the photocatalyst has wide practical applications. In addition, the photocatalytic performance and the XRD and FTIR spectra showed no obvious changes even after four photocatalytic degradation cycles, which revealed the high stability of the PCNNS/AP/NCDs photocatalyst. Furthermore, the possible degradation pathways of TC and the possible Z-scheme mechanism were proposed with ˙O2− and h+ as the main active species contributing to photocatalytic degradation. The results provide a novel insight into the fabrication of Z-scheme PCNNS/AP/NCDs and introduce them as an efficient visible-light-responsive photocatalyst for use in practical applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 43
·17104-17115
·
IF 3.069
Lisha You,Minghuan Gao,Tiesheng Li,Linna Guo,Penglei Chen,Minghua Liu
Semiconductor-based photocatalysis attracts wide attention owing to its ability to directly utilize solar energy for the production of solar fuels. In particular, the construction of Z-scheme heterojunctions is demonstrated to benefit the photocatalytic performance because of the separation and transfer of the photogenerated charge carriers and well-preserved strong redox ability. In this work, a series of Z-scheme Ag3PO4/WO3 p–n junction photocatalysts were prepared employing a facile impregnation method. The photocatalysts (Ag3PO4/WO3 p–n junction) presented enhanced photo-degradation efficiency; for example, with AW-45, 99.9% degradation could be obtained for RhB (30 ppm) on irradiation (λ > 420 nm, 350 W xenon lamp) for 7 min, which is a great improvement compared with the individual constituents. The degradation rate for AW-45 was 27 times higher than that of a commercial powder (P25). The apparent kinetic rate of catalytic degradation was obtained according to the results from the degradation process. The mechanism for electron transfer between Ag3PO4 and WO3 was also investigated. The reduction and oxidation processes concentrated on the CB (conducting band) of Ag3PO4 and the VB (valence band) of WO3, resulting in promoting the mechanism for photocatalytic degradation in the Z-scheme Ag3PO4/WO3 p–n junction photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Jing Wang,Tianli Yang,Ren He,Kehui Xue,Renrui Sun,Wenlei Wang,Juntao Wang,Ting Yang,Yuanlan Wang
Ternary heterostructure nanotubes of In 2 S 3 -CdIn 2 S 4 @X(X = Ag, Ag 3 PO 4 , AgI) were synthesized with enhanced photocatalytic activity for efficiently degrading pollutants. Electron beam irradiation was employed to artificially introduce interface defects to the heterostructure nanotubes. The experimental results for degrading carmine and Cr 6+ under visible light irradiation showed that the photocatalytic efficiency of In 2 S 3 -CdIn 2 S 4 was improved to some extent by the introduction of silver compounds. DRS results confirmed that the band gaps of In 2 S 3 -CdIn 2 S 4 were reduced to 1.62 eV and 1.58 eV by introducing Ag 3 PO 4 and AgI, respectively. Interestingly, the band gap of In 2 S 3 -CdIn 2 S 4 @AgI after electron beam irradiation was further reduced to 1.56 eV, resulting in that the degradation time of both Cr 6+ and carmine by In 2 S 3 -CdIn 2 S 4 @AgI after high-energy electron beam irradiation was shortened to only 5 min. The XRD spectra of the photocatalysts after five cycles could maintain the original crystal form to a large extent. The O H stretching vibration peaks of In 2 S 3 -CdIn 2 S 4 @AgI after electron beam irradiation at 3387 cm −1 became wider and sharper, thus indicating that the number of free hydroxyl groups on the heterostructure surface significantly increased. PL results showed that electron beam irradiation could significantly reduce the PL emission peak and enhance the utilization of photogenerated charge carriers. EIS results further confirmed that In 2 S 3 -CdIn 2 S 4 @AgI processed by electron beam irradiation had higher photogenerated electron-hole separation efficiency. Based on the experimental results, a feasible reaction pathway and photocatalytic mechanism for the degradation of carmine was investigated. ESR results showed that the main active groups in the whole photocatalytic system were •O 2 – and h + .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANO
·
2017
·
IF 1.025
Yunyun Wang,Jixiang Wang,Hongqiang Shen,Pengwei Huo,Chunmei Li,Yongsheng Yan,Weidong Shi
The photocatalytic technology as a kind of green and potential technology has been paid more and more attention in ever-increasing environmental pollution and energy shortage. In this study, a practical strategy is proposed to facilitate effectively the separation of photogenerated electrons and holes by addition of graphene oxide in Ag 3 PO 4 and Bi 2 WO 6 nanocrystals semiconductor composites. Compared with GO-single component, the three-component RGO-Ag 3 PO 4 /Bi 2 WO 6 composites exhibited improved photocatalytic activity with a degradation rate that reached up to 91% for tetracycline (TC) by visible light irradiation. Graphene oxide served as an electronic conduction medium to effectively transfer the photogenerated electrons from the conduction band of Bi 2 WO 6 to the valence band of Ag 3 PO 4 ; the all-solid-state Z-Scheme photocatalytic mechanism was proposed. Our work provides an effective method for development of pragmatic photocatalysts in the present environmental pollution, energy problems and other related fields.
✓ 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
CHEMOSPHERE
·
2021
·
IF 7.086
Jiangfu Zheng,Wenbo Li,Rongdi Tang,Sheng Xiong,Daoxin Gong,Yaocheng Deng,Zhanpeng Zhou,Ling Li,Long Su,Lihua Yang
In this study, an investigation is conducted into the degradation of nitenpyram (NTP) using highly efficient APMMO/PDS/Vis system. As photocatalysts, silver phosphate (AP) and calcined Zn–Al layered double hydroxides (MMO) exhibit high efficiency in achieving charge separation. Besides, the injection of electrons into peroxydisulfate (PDS) from the APMMO can contribute to obtaining the species in the active state with higher efficiency. Based on the APMMO/PDS/Vis system, 50 mg/L of nitenpyram (NTP, 50 mL) can be completely removed in 60 min using 0.8 g/L photocatalyst and 0.2 g/L PDS under the optimum condition and visible light (780 nm > λ > 420 nm). Meanwhile, as demonstrated under visible light within 30 min, an ultrahigh degradation efficiency can be achieved by NTP based on APMMO1/PDS/Vis system. Besides, the electron paramagnetic resonance (EPR) technique and radical quenching experiments suggested 1 O 2 , h + , SO 4 − •, •O 2 − , and •OH are all contributory to the removal of pollutants. Given the outcomes achieved by LC/MS system and mass spectrometry, the primary degradation intermediates of NTP end up being converted into photodegradation products (such as 2-Chloropyridine, 6-Chloropurine Riboside and dl -Leucine). Additionally, there are three potential photodegradation pathways to NTP degradation have been deployed. Moreover, the NTP light degradation occurring in APMMO1/PDS/Vis system is competent under the three types of real water sample. Accordingly, the high-efficiency APMMO1/PDS/Vis system is fit for use in water pollution control for agricultural productions.
研究领域:
环境科学
·
农业科学
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2018
·
IF 2.593
Cuiping Lin,Xin Xie,Chen Li,Qishe Yan
The magnetic Co 0.5 Zn 0.5 Fe 2 O 4 incorporated Ag 3 PO 4 photocatalysts were fabricated by facile sol-gel and hydrothermal route. The resulting Co 0.5 Zn 0.5 Fe 2 O 4 /Ag 3 PO 4 composites were characterized by XRD , 1 SEM, 2 UV–vis DRS , 3 FT-IR 4 and VSM. 5 The results indicated that the magnetically separable composites with good dispersity showed a strong absorption in the uv–vis region and the saturation magnetization was 85.25 emu g −1 . Anionic dye methyl orange (MO) and tetracycline hydrochloride (TCH) were used to evaluate the activity of the photocatalysts . The result revealed that the magnetic composites exhibited enhanced photocatalytic activity and stability under the visible light irradiation. The ·OH and ·O 2 - radicals were found to be the major active species during the photodegradation of TCH, while·O 2 - played the important role in photodegrading MO. And a Z-scheme mechanism for the enhanced photocatalytic process was proposed.
研究领域:
环境科学
·
材料科学
·
生物学
✓ 已验证
DOI
高影响因子
International Journal of Environmental Research and Public Health
·
2022
·Vol. 19
·期 5
·2934
·
IF 4.614
Hong Liu,Houwang Chen,Ning Ding
In this research, the preparation of a Ag3PO4/g-C3N4@MoS2photocatalyst and the performance and mechanism of degradation of 2-amino-4-acetaminoanisole (AMA) were studied. The phase composition and morphology of the synthesized samples were comprehensively characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), ultraviolet–visible diffuse reflectance (UV–Vis), and photoelectron spectroscopy (XPS). The catalytic performance of the photocatalyst was evaluated by the visible-light catalytic degradation of the AMA. The experimental results show that the Ag3PO4/g-C3N4@MoS2composite photocatalyst has stronger photocatalytic oxidation and reduction capabilities than Ag3PO4and Ag3PO4/g-C3N4. The material only decreases by 31.3% after five cycles of use, indicating that the material has good light stability. Free radical capture experiments prove that photo-generated holes (h+) and superoxide radicals (·O2−) are the main active substances in the photocatalytic process. The fundamental studies in the present research provide a new perspective for constructing an innovative type of visible-light photocatalyst and a new way to promote the photocatalytic degradation of organic pollutants.Keywords:catalysis;degradation;nanomaterials;Ag3PO4;heterojunction formation
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Chentao Hou,Yijie Li,Miaomiao Niu,Yi Liu,Xianghui Kong,Mingyuan Zhang,Liping Wang
Photocatalysis is still a promising technology to alleviate the antibiotic residual problem of wastewater in the ecological environment. Herein, an all-solid-state Z-scheme Ag@Ag 3 PO 4 /TiO 2 -(F 2 ) (TFAP) heterojunction photocatalyst was constructed using the hydrothermal method for the first time. The photocatalytic performance of TFAP nanocomposites for tetracycline hydrochloride (TCH) degradation was evaluated under simulated sunlight. The prepared materials were characterized by XRD , FE-SEM, TEM , BET, FT-IR, UV vis DRS , XPS , PL, and ESR measurements. The TFAP nanocomposites showed high degradation efficiency and excellent repeatability to TCH destruction. Among them, the (TFAP 1–1) nanocomposite has a lower bandgap energy (1.80 eV), a larger specific surface area (53.48 m 2 /g), and a lower electron-hole recombination rate. After 2.5 h of simulated sunlight irradiation, the degradation rate of the 200 mg/L (TFAP 1–1) nanocomposite (k = 0.0154 min −1 ) to 10 mg/L TCH reached 94.14%, which was much higher than that of the pure TiO 2 , TiOF 2 , and Ag 3 PO 4 samples. The experimental results demonstrated that TiO 2 was generated as an intermediate product during the chemical reaction process between Ag 3 PO 4 and TiOF 2 . Additionally, Ag nanoparticles were formed in the Ag 3 PO 4 /TiO 2 /TiOF 2 heterojunction system. An electric field was formed between Ag 3 PO 4 and Ag, enhancing the visible light absorption ability. Because of the Schottky potential difference, the electrons accumulate in Ag nanoparticles, thus enhancing the photocorrosion resistance of Ag 3 PO 4 . Additionally, the localized surface plasmon resonance (LSPR) effect of Ag nanoparticles greatly promoted the separation of carriers at the interface of the heterojunction. The LSPR effect leads to the co-oscillation of free electrons, which leads to the strong absorption of electromagnetic energy and enhances the photocatalytic performance of the heterojunction. The Ag@Ag 3 PO 4 nanocomposites acted as electron transport media for an all-solid-state Z-scheme TFAP heterojunction system. This study provides some in-depth insights into the structural design of Z-scheme heterojunctions, which have certain implications for other catalytic systems.
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Jianke Tang,Rongqian Meng,Yanfeng Xue,Shengjian Zhang,Qiaoling Li
A novel Ag 3 PO 4 /WO 3 ·H 2 O composite was prepared by loading Ag 3 PO 4 on WO 3 ·H 2 O substrate via a two-step hydrothermal method and characterized by various analytical techniques. The photocatalytic performance was evaluated by the degradation of methylene blue (MB) and oxytetracycline (OTC) under visible light irradiation. Within 30 min, 98.9 % MB can be degraded by the Ag 3 PO 4 /WO 3 ·H 2 O composite with a molar ratio of 3:1 (3Ag/1W), which is higher than that of individual Ag 3 PO 4 and WO 3 ·H 2 O. The 3Ag/1W photocatalyst also exhibits improved photocatalytic activity for OTC degradation than pure WO 3 ·H 2 O and Ag 3 PO 4 . The improvement of photocatalytic activity would be mainly ascribed to the highly efficient separation of photo-induced electron-hole pairs due to matched band structure, as confirmed by photoluminescence spectra (PL) and photocurrent responses test. According to the experimental results of radical trapping and electron spin resonance (ESR), a possible photocatalytic mechanism of the Ag 3 PO 4 /WO 3 ·H 2 O composite was proposed.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2023
·
IF 4.1
Tingting Du,Congzhi Hu,Yuye Li,Youyong Pang,Ming Li,Botian Liu,Ling Li,Yongping Liu,Huidan Lu,Bin Huang
This paper discusses the photocatalytic properties of Ag/Ag 3 PO 4 /Ti 3+ -TiO 2 composites. The nanostructured composites were synthesized by gas-phase hydrolysis, precipitation, and photoreduction methods. The photocatalytic performance of the photocatalysts was evaluated by degrading RhB and TC under visible light. The degradation efficiency of AT4 for RhB and TC reached 99.9 % and 78.2 % under visible light irradiation for 20 min and 2.5 min, respectively. The superior performance of AT4 is facilitated by the combined influence of the heterojunction and the SPR . The free radical capture test proved that h + and •O 2 − were the major reactive groups, and in conjunction with UV–vis DRS curves and Mott-Schottky curves, a probable reaction mechanism was proposed.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）