Molecular Catalysis
·
2024
·
IF 3.9
Rui Lu,Jiaying Luo,Xuening Wang,An Chen,Yiwen Xie,Yang Xu,Tian Shang,Ruyan Li,Dongmei Jiang,Qingfeng Zhan
In this study, an efficient Co-doped Ag 3 PO 4 photocatalyst was prepared by the deposition method. Compared with Ag 3 PO 4 , the degradation efficiency of the optimal sample CAP-2 (the mole ratio of Co/Ag was 0.057 %) for MO (20 mgL −1 ) increased from 53.4 % to 95.0 % within 20 min, and the degradation efficiency for phenol (20 mgL −1 ) increased from 57.9 % to 91.8 % within 80 min. Moreover, the CAP-2 sample performed excellent mineralization ability and stable recycling capacity. Free radical capture experiments and electron spin resonance (ESR) measurements indicated that holes (h + ) and superoxide radicals (⋅O 2− ) were the main active radicals. Doping Co ions broadened the optical absorption, introduced impurity level to promote the separation of carriers, and generated additional ⋅O 2− owing to the mutual conversion of Co 3+ and Co 2+ , thus considerably improving Ag 3 PO 4 photocatalytic performance. This work provides a new reference for doping metal ions modified semiconductor photocatalysts to efficiently degrade organic pollutants.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhuo Chen,Zhiyang Lu,Weijun Tian,Bingkun Liu,Bingjie Huo,Jing Zhao,Mengyuan Zou,Ruijuan Zhang,Xinran Yu,Xinbo Wang
Pyrene (Pyr) and its derivatives are classified as Persistent Organic Pollutants (POPs), which exhibit significant toxicological effects and pose serious threats to ecosystems. Photocatalytic technology is increasingly employed for the remediation of POPs due to its effective and environmentally sustainable degradation capabilities. However, conventional photocatalytic materials, primarily in powder form, face challenges related to separation and recovery from aqueous environments, significantly limiting their practical application. In this study, we successfully synthesized a three-dimensional (3D) porous immobilized photocatalytic material by decorating Ag 3 PO 4 and BiOBr onto Ni foam (NF) using a hydrothermal method combined with continuous ionic layer adsorption. The results demonstrated Ag 3 PO 4 /BiOBr/NF exceptional light degradation capabilities, achieving over 90 % degradation of Pyr, 1-methylpyrene, and 1-hydroxypyrene, as well as over 40 % degradation of 1-nitropyrene under visible light irradiation over a duration of 5 h. Its degradation efficiency decreased by 12.49 % after five cycles, demonstrating its reusability. The roles of superoxide radicals ( O 2 – ) and holes (h + ) were critical in the degradation process. Furthermore, based on experimental findings, we proposed a Z-type heterojunction degradation mechanism for the Ag 3 PO 4 /BiOBr/NF composite, accompanied by an analysis of the potential degradation pathways for Pyr. Consequently, the recyclable immobilized photocatalytic materials developed in this research contribute novel insights into the photocatalytic degradation of POPs.
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Catalysts
·
2022
·Vol. 12
·期 6
·599
·
IF 4.501
Yong Li,Mingqing Zhang,Yanfang Liu,Qinghua Zhao,Xin Li,Qianyu Zhou,Yuanfu Chen,Shifeng Wang
Research has demonstrated that the formation of composites of titanium dioxide (TiO2) with silver phosphate (Ag3PO4) through the construction of heterojunctions can expand its light absorption range and suppress the recombination of photogenerated electron–hole pairs, thereby improving the photocatalytic performance. However, this method offers only limited performance improvements, and the composite photocatalysts are costly due to the expensive Ag3PO4. In this study, Ti3C2MXene, which has good hydrophilicity and excellent electrical conductivity, is first used to form Schottky junction composites with bronze TiO2(TiO2(B)) via electrostatic self-assembly. Then, Ag3PO4quantum dots were further formed on the surface of the TiO2(B)/Ti3C2MXene by in situ self-growth, and Ag3PO4formed heterojunctions and Schottky junctions with TiO2(B) and Ti3C2MXene, respectively. Finally, a ternary composite photocatalyst TiO2(B)/Ti3C2MXene/Ag3PO4was jointly constructed by these functional junctions. Under the synergistic effect of these functional junctions, the mobility and fast separation performance of photogenerated electron–hole pairs of the composite photocatalyst were significantly improved, the recombination of photogenerated electron–hole pairs was effectively suppressed, and the light absorption performance was enhanced. As a result, the composite photocatalyst exhibited excellent photocatalytic performances.Keywords:ternary composite photocatalyst;heterojunction;photocatalytic degradation;bronze TiO2;Ti3C2MXene
研究领域:
材料科学
·
环境科学
·
化学
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MATERIALS RESEARCH BULLETIN
·
2018
·
IF 2.873
Zhe Cui,Yangang Sun,Zhendong Zhang,Meilan Xu,Binjie Xin
A novel CC@MoS 2 -Ag 3 PO 4 heterostructure, composed of Ag 3 PO 4 nanoparticles decorated MoS 2 nanosheets on carbon fiber cloth (CC), is fabricated by a simple hydrothermal method and a successive ionic layer absorption reaction. The CC@MoS 2 -Ag 3 PO 4 heterostructure displays an excellent photocatalytic activity of ∼96% degradation rate for RhB solution under simulated daylight, which is more than 10 times as much as that of pure Ag 3 PO 4 or MoS 2 . The CC@MoS 2 -Ag 3 PO 4 heterostructure with optimized photoactivity is investigated by optical and electrochemical measurements. The CC@MoS 2 -Ag 3 PO 4 heterostructure can not only broaden the photoresponse range of MoS 2 , but also alleviate the photodegradation of Ag 3 PO 4 , and the easily separated CC provides a proper conductive substrate and rapid charge transfer channels. The probable photocatalytic mechanism of CC@MoS 2 -Ag 3 PO 4 heterostructure is discussed in detail. Therefore, the CC@MoS 2 -Ag 3 PO 4 heterostructure with high efficient photocatalytic performance and easy separation is a promising photocatalytic material.
研究领域:
材料科学
·
光催化
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纳米材料
·
环境化学
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Qing Guan,Sara Khan,Zhaohua Wang,Qian Liu,Leilei Zhang,Yongjie Zhao,Xianze Wang,Xia Yang,Zhi Geng
A critical issue in the removal of fluoroquinolone antibiotics, which were frequently detected in drinking water sources and water treatment plants, is the design of highly efficient photocatalysts . In order to utilize visible-light, improve the electrons transfer and reduce the recombination of photogenerated carriers, TiO 2-X /Ag 3 PO 4 heterojunctions were fabricated by hydrothermal technology combined with the coprecipitation method for the first time. The morphological, structural, and optical properties of as-prepared catalysts were extensively characterized. In comparison with single-phase TiO 2-X and Ag 3 PO 4 , TiO 2-X /Ag 3 PO 4 composite exhibited enhanced photocatalytic efficiency for the degradation of methyl orange (MO) and gatifloxacin (GAT). Especially for the composite with the mole ratio of TiO 2-X and Ag 3 PO 4 was 1:1, the reduction of antimicrobial activity of the GAT byproducts reached 82.4% after 5 min visible-light irradiation. Furthermore, the pathway in photocatalytic decomposition of GAT was proposed by HPLC-MS and the electron transfer mechanism over TiO 2-X /Ag 3 PO 4 heterojunctions was suggested by the radical capture experiments, transient photocurrent responses, and electrochemical impedance spectroscopy tests.
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APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Fanfan Yan,Guowen Shen,Xi Yang,Tianjiao Qi,Jie Sun,Xinghua Li,Mingtao Zhang
Developing of novel chemiresistive gas sensing materials with desired unique gas chemisorption properties is of great important. In this work, motivated by the special electronic structure, Ag 3 PO 4 semiconductor is systematically investigated as gas sensing material for the first time. Encouragingly, the Ag 3 PO 4 nanoparticles based gas sensors exhibit high selectivity to NH 3 at near room temperature of 50 °C with negligible responses to the other gases (including H 2 , CO, ethanol, acetone, NO 2 and SO 2 ). Furthermore, the responses decreased with the increase of operating temperature from 50 to 100 °C, indicating the superior NH 3 sensing activity. The in-situ infrared characterization and theoretical calculations reveal that the lone pair of NH 3 coordinate with the superficial silver atoms of Ag 3 PO 4 accompanied with strong adsorption energy , efficient quantities electron migration and thermodynamic favorable, explained the origin of the high selectivity. Our work indicates that Ag 3 PO 4 based materials are very promising low operating temperature and highly selective NH 3 -sensing materials.
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ADVANCED ENGINEERING MATERIALS
·
2025
·
IF 3.3
Jiayi He,Zihan Li,Qilong Wang,Yameng Pei,Changmin Cai,Anfu Chen,Lijia Huang
In recent years, due to the drug resistance and side effects caused by microbe infection and microbe modification, people have begun to implement strategies to reduce side effects to prevent microbe infection. Therefore, a synergistic strategy is designed to prepare bioactive polypropylene/silver phosphate (PP/Ag 3 PO 4 ) composites with different Ag 3 PO 4 contents by combining PP and Ag 3 PO 4 through melt blending, and micrometer-scale surfaces inspired by lotus leaves are fabricated using the hot embossing technique. By comparing and analyzing the obtained data, it is found that the microstructured PP/Ag 3 PO 4 prepared by 2800 mesh sieve has the best superhydrophobicity and antibacterial properties with 5% Ag 3 PO 4 . The contact angle of the composite material can be increased to 152°, showing excellent superhydrophobic properties. During the antibacterial test, it is observed that the colony formation unit counting on the surface reaches a minimum, and the number of surviving bacteria decreases to a minimum, indicating a dense and orderly arrangement, and the PP/Ag 3 PO 4 composite containing 5% silver phosphate shows excellent antibacterial properties.
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Journal of Energy Storage
·
2026
·
IF 10.7
Jabir Hakami
This study effectively synthesized distinct cube-like silver phosphate (Ag 3 PO 4 ) microstructures by a simple hydrothermal process, exhibiting perfect morphological manipulation. The electrochemical properties of the synthesized Ag 3 PO 4 electrode were assessed in 2 M KOH aqueous electrolyte by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). The electrode exhibited a specific capacitance (Cs) of 345.25 F/g and sustained an effective specific capacity (Sc) of 172.62C/g at scan rate of 10 mV/s. Also, by using Dunn model, the capacitive/diffusive contribution were determined to be 15.6%/84.4% at scan rate of 10 mV/s and 28.8%/71.2% at scan rate of 50 mV/s. The Ag 3 PO 4 electrode demonstrated good cycling stability, retaining 95.9% capacity through 6000 charge-discharge cycles, in addition to exhibiting low interior resistance and rapid charge-transfer kinetics. The distinct cube-like shape of Ag 3 PO 4 offers various electroactive surface sites and promotes effective electrolyte penetration and ion diffusion routes, thus enhancing electrochemical performance. This study presents a straightforward yet efficient approach for morphology-manipulated Ag 3 PO 4 electrodes, providing new perspectives into the construction of highly effective phosphate-related materials for modern supercapacitor applications.
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MOLECULES
·
2023
·Vol. 28
·期 4
·1586
·
IF 4.6
Abdalla A. Elbashir,Mahgoub Ibrahim Shinger,Xoafang Ma,Xiaoquan Lu,Amel Y. Ahmed,Ahmed O. Alnajjar
In this study, a carboxylated carbon nanotube-grafted Ag3PO4@AgIO4(CNT-COO−/Ag3PO4@AgIO4) composite was synthesized through an in situ electrostatic deposition method. The synthesized composite was characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS), and energy-dispersive X-ray spectroscopy (EDS). The electron transfer ability of the synthesized composite was studied using electrochemical impedance spectroscopy (EIS). The CNT-COO−/Ag3PO4@AgIO4composite exhibited higher activity than CNT/Ag3PO4@AgIO4, Ag3PO4@AgIO4, and bare Ag3PO4. The material characterization and the detailed study of the various parameters thataffect the photocatalytic reaction revealed that the enhanced catalytic activity is related to the good interfacial interaction between CNT-COO and Ag3PO4. The energy band structure analysis is further considered as a reason for multi-electron reaction enhancement. The results and discussion in this study provide important information for the use of the functionalized CNT-COOH in the field of photocatalysis. Moreover, providinga new way to functionalize CNT viadifferent functional groups may lead to further development in the field of photocatalysis. This work could provide a new way to use natural sunlight to facilitate the practical application of photocatalysts toenvironmental issues.Keywords:insitu synthesis;CNT-COO−;Ag3PO4@AgIO4;sunlight;organic dyes
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Qingyuan Song,Xueling Shan,Liyin Bu,Anna Dai,Ding Jiang,Wenchang Wang,Hiroshi Shiigi,Zhidong Chen
A highly efficient electrochemiluminescence resonance energy transfer (ECL-RET) aptasensor was constructed for ultrasensitive detection of diethylstilbestrol (DES). The composite composed of silver orthophosphate and zirconium-based metal–organic frameworks (Ag 3 PO 4 -UiO-66) was prepared as a sensing platform for aptasensor incubation. Ag 3 PO 4 , a novel ECL donor, whose emission could be obviously enhanced through loading on UiO-66. Particularly, the composite of Ag 3 PO 4 -UiO-66 could minimize the aggregation of Ag 3 PO 4 , which provided a novel possibility for the construction of high ECL efficiency sensors. UiO-66 presented ultrahigh surface area to improve the loading capacity of Ag 3 PO 4 and DES-specific aptamer. Notably, Ag 3 PO 4 with superb catalytic properties could immobilize DES aptamer via Ag–NH 2 bond and further ensured the distance between the ECL donor and the energy receptor. To design a novel ECL-RET system, GO nanosheets were synthesized as a suitable ECL acceptor which could be fixed through electrostatic adsorption. Owing to the superior spectral overlap, GO could significantly quench the ECL emission of Ag 3 PO 4 . Under the optimal conditions, the constructed ECL-RET aptasensor showed a satisfactory response to DES in a linear range of 1.0 × 10 −14 ∼ 1.0 × 10 −8 M and the detection limit was 7.2 × 10 −15 M (S/N = 3). This paper not only developed a novel approach for environmental water quality monitoring but also offered more opportunities for building highly sensitive ECL-RET aptasensors.
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MOLECULES
·
2021
·Vol. 26
·期 22
·6987
·
IF 4.412
Yong Li,Yanfang Liu,Mingqing Zhang,Qianyu Zhou,Xin Li,Tianlu Chen,Shifeng Wang
Photocatalytic degradation, as an emerging method to control environmental pollution, is considered one of the most promising environmental purification technologies. As Tibet is a region with some of the strongest solar radiation in China and even in the world, it is extremely rich in solar energy resources, which is ideal for applying photocatalytic technology to its ecological environment protection and governance. In this study, Na2Ti3O7nanobelts were prepared via a hydrothermal method and converted to TiO2∙xH2O ion exchange, which was followed by high-temperature calcination to prepare TiO2(B) nanobelts (“B” in TiO2(B) means “Bronze phase”). A simple in situ method was used to generate Ag3PO4particles on the surface of the TiO2nanobelts to construct a Ag3PO4/TiO2(B) heterojunction composite photocatalyst. By generating Ag3PO4nanoparticles on the surface of the TiO2(B) nanobelts to construct heterojunctions, the light absorption range of the photocatalyst was successfully extended from UV (ultraviolet) to the visible region. Furthermore, the recombination of photogenerated electron–hole pairs in the catalyst was inhibited by the construction of the heterojunctions, thus greatly enhancing its light quantum efficiency. Therefore, the prepared Ag3PO4/TiO2(B) heterojunction composite photocatalyst greatly outperformed the TiO2(B) nanobelt in terms of photocatalytic degradation.Keywords:photocatalyst;heterojunction;photocatalytic degradation;TiO2(B) nanobelts
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CATALYSIS LETTERS
·
2020
·Vol. 151
·期 3
·734-747
·
IF 2.482
Zhang Xiaorui,Chen Chen,Jiang Caiyun,Zhou Haifei,Cao Wang,Wang Yuping
Abstract A new type of Ag 3 PO 4 /UiO-66-NH 2 Z-scheme heterojunction nanocomposite with visible light catalytic activity was successfully prepared. The synthesis of the composite was confirmed by XRD, FT-IR, SEM, TEM, EDS, XPS. The Ag 3 PO 4 /UiO-66-NH 2 Z-scheme heterojunction can effectively improve the utilization of visible light. The optimal Ag/U/1/4 composite has the highest degradation efficiency for methylene blue (MB, 30 mg/L) in 90 min (80%) and Norfloxacin (NOR, 10 mg/L) in 150 min (85%). The decrease of Nyquist radius and the enhancement of photocurrent response indicated that the combination of photogenerated electron–hole pair in Ag 3 PO 4 /UiO-66-NH 2 composite material is significantly inhibited. N 2 adsorption–desorption and zeta potential results indicated that biggish specific surface area and negative zeta potential value are more favorable for the adsorption of the cationic dye MB. The cyclic test verified the good stability of Ag 3 PO 4 /UiO-66-NH 2 heterojunction material. Furthermore, the photocatalytic degradation mechanism of MB was discussed by introducing different traps to inhibit the possible active substances in the degradation process. This work testified that an efficient photocatalytic composite based on metal–organic frameworks can be used for the degradation of pollutants. Graphic Abstract
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