JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2016
·
IF 4.179
Yuhui Xiao,Xianghua Song,Zhuo Liu,Ruiping Li,Xiaorong Zhao,Yingping Huang
The degradation of cefazolin (CFZ) by Ag 3 PO 4 /BiOBr composites under visible-light irradiation was explored. The main and interaction of parameters (catalyst dosage, pH, CFZ initial concentration and degradation time) on removal of CFZ were studied by Box–Behnken design combined with response surface methodology. The pH was the most influential factor and both h + and OH played a role in the photocatalytic process. The high correlation coefficients (R 2 = 0.9986 and adjusted R 2 = 0.9973) demonstrated close fit between the predicted and experimental values. The exceptional efficiency of Ag 3 PO 4 /BiOBr composite in removing CFZ represents a promising technique for treatment of CFZ-containing wastewater.
研究领域:
环境科学
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药学
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材料科学
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产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2025
·
IF 9.1
Lina Dai,He Wang,Liru Cui,Yanduo Liu
Single photocatalysts face problems such as easy recombination of photo-generated charge carriers, weak oxidation-reduction ability, and narrow spectral response range, which greatly restrict their practical applications in energy and environmental fields. This article constructs a new type of Cu-Co Prussian blue analogues S-scheme photocatalytic material. The material is composed of oxidized photocatalysts (Ag 3 PO 4 ) and reduced photocatalysts (Cu-Co PBAs). By utilizing the characteristics of Cu-Co Prussian blue analogues photocatalysts, such as high conduction band position, rich catalytic sites, and small band gap, photocatalytic efficiency can be significantly enhanced. The CO production rate is 36.3 μmol/g/h, and the selectivity can reach 93.8 %, which is far superior to the current mainstream photocatalytic system. By studying the construction method and CO 2 reduction performance of the composite photocatalyst, the structure-performance relationship is clarified. The steady-state photocurrent spectroscopy reveals the S-scheme mechanism photocarrier transfer and separation kinetics. Techniques such as near-ambient pressure X-ray photoelectron spectroscopy reveal the interface electron transfer mechanism. In-situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy and Density Functional Theory calculations are used to study the formation of reaction intermediates and reveal the catalytic mechanism. This study will offer critical understanding for advancing developments of selective photocatalysts aimed at sustainable CO 2 utilization.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 11
·32095-32107
·
IF 5.19
Huang Hua,Tao Xin,Niu Zhirui,Qin Xiaoqian,Ren Jialu,Shan Baoqin,Liu Yu,Ren Jingyu
Visible-light-driven magnetic heterojunction as a promising photocatalysts has received much attention in environmental remediation. In this work, novel Z-scheme heterojunction MnZnFe 2 O 4 @Ag 3 PO 4 (MZFO@APO) magnetic photocatalysts with excellent visible-light-driven photocatalytic activity are successfully constructed and characterized. The photocatalytic activity for phenol degradation is measured, and photodegradation mechanism is investigated with EPR, radical trapping experiments, and LC–MS. It turns out that the heterojunction introduced MZFO exhibits good adsorption effect on visible light and the direct Z-scheme bandgap alignment of MZFO and APO significantly improves charge separation and electron transfer, outperforming that of pure APO. MZFO@APO-40% with 40% APO content shows the rapid photodegradation performance, obtaining a 100% removal efficiency of phenol (25 mg L −1 ) after 12-min visible light irradiation, and its kinetic constants are approximately 25.3 and 4.9 times higher than that of P25 TiO 2 and pure APO, respectively. Especially, MZFO@APO-40% also possesses a high magnetic separation property and can be efficiently reused for 5 cycles. Additionally, EPR and radical trapping experiments confirm that h + , O 2 − , and 1 O 2 are the main active species in the photocatalytic process. Hydroquinone and small molecular organic acids such as maleic acid and oxalic acid are detected by LC–MS, which further indicates that the pathway of phenol degradation involves hydroxylation, open-ring reactions, and mineralization reactions. The novel addition of MZFO in photocatalyst construction has the potential to promote its application in environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2016
·
IF 3.014
Gao-yu Zhao,Lun-jiang Liu,Jun-rong Li,Qin Liu
Novel NiFe 2 O 4 /Ag 3 PO 4 composites were prepared by a simple ion-exchange deposition method. The samples were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and UV–visible diffuse reflectance spectroscopy (UV–vis DRS). It is worth to note that these NiFe 2 O 4 /Ag 3 PO 4 composites could act as both adsorbents and photocatalysts for the removal of methylene blue (MB). The as-prepared 5%-NiFe 2 O 4 /Ag 3 PO 4 composite exhibited much higher adsorptive and photocatalytic activity than the pure Ag 3 PO 4 . Through the combined action of adsorption and photodegradation, MB could be removed more efficiently. The photocatalytic mechanism of NiFe 2 O 4 /Ag 3 PO 4 composites is also proposed.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 43
·17104-17115
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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.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2014
·
IF 1.552
Ming Ge
A visible-light-driven Ag 3 PO 4 catalyst was successfully synthesized by a facile ion-exchange route. The as-synthesized Ag 3 PO 4 was characterized by X-Ray diffraction (XRD), field-emission scanning electron microscopy, N 2 adsorption-desorption, UV-Vis diffuse reflectance spectroscopy and Fourier transform infrared spectroscopy . Under visible light irradiation , the Ag 3 PO 4 catalyst showed excellent photocatalytic activity for rhodamine (RhB) degradation, but was poor at degrading methyl orange (MO) because of lower adsorption of MO molecules onto the surface of the Ag 3 PO 4 . The photodegradation of RhB and MO was achieved by holes and O 2 •− radical attack in the Ag 3 PO 4 suspension. The photodegradation of MO over the Ag 3 PO 4 catalyst was greatly enhanced in the presence of RhB owing to greater production of O 2 •− radicals.
研究领域:
环境化学
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光催化
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材料科学
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环境功能材料
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污染物降解
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DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2019
·Vol. 36
·期 2
·236-247
·
IF 2.476
Cui Yanhua,Yang Lili,Meng Minjia,Zhang Qi,Li Binrong,Wu Yilin,Zhang Yunlei,Lang Jihui,Li Chunxiang
A simplified strategy for facilely fabricating antifouling graphite carbon nitride/silver phosphate (g-C 3 N 4 /Ag 3 PO 4 ) nanocomposite photocatalytic polyvinylidene fluoride (PVDF) porous membranes was developed for effective removal of rhodamine B (RhB). g-C 3 N 4 /Ag 3 PO 4 heterojunction was strongly fixed to the interior of the PVDF membranes via phase inversion method. The membrane structure was analyzed by Fourier transform spectrophotometer (FT-IR). The morphology of the prepared membranes was investigated using scanning electron microscopy (SEM), EDX-mapping and atomic force microscopy (AFM), respectively. All prepared nanocomposite photocatalytic PVDF membranes exhibited a typically porous structure, and g-C 3 N 4 /Ag 3 PO 4 nanocomposites were well dispersed inside the membranes. The obtained g-C 3 N 4 /Ag 3 PO 4 heterojunction nanoparticle decorated PVDF membrane had a lower water contact angle of 79° and higher porosity of 85% than that of other two control membranes. The nanocomposite photocatalytic PVDF porous membranes had extremely high permeation flux over 1,083 L·m -2 ·h -1 , and could be used for the removal of RhB. The removal efficiency of g-C 3 N 4 /Ag 3 PO 4 -PVDF membranes towards RhB solution under visible light irradiation reached 97%, higher than that of the pure PVDF membranes (41%) and g-C 3 N 4 -PVDF membranes (85%). Remarkably, the flux performance and flux recovery ratio ( FRR ) of membranes revealed that the g-C 3 N 4 /Ag 3 PO 4 -PVDF membranes could recover high flux after fouling, which presented better fouling resistance. Furthermore, the fabricated antifouling g-C 3 N 4 /Ag 3 PO 4 nanocomposite photocatalytic PVDF porous membranes exhibited excellent recyclability. Therefore, it is expected that g-C 3 N 4 /Ag 3 PO 4 -PVDF membranes could provide an energy-saving strategy for effective removal of organic dyes wastewater and have a great potential for practical wastewater treatment in the future.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2016
·
IF 8.328
Ning Shao,Jinnan Wang,Dadao Wang,Philippe Corvini
We synthesized novel three-dimensional photocatalyst (Ag 3 PO 4 /TiO 2 @MoS 2 ) with various content of TiO 2 @MoS 2 by electrospining, sequential hydrothermal reaction and chemical deposition. The optimal content of TiO 2 @MoS 2 in Ag 3 PO 4 /TiO 2 @MoS 2 composites is 3.5 wt%, and the bandgap of Ag 3 PO 4 /TiO 2 @MoS 2 (3.5 wt%) (1.85 eV) was much lower than that of pure Ag 3 PO 4 (2.45 eV). Due to high conductivity of TiO 2 @MoS 2 heterostructure, the separation efficiency of electron-hole pairs of Ag 3 PO 4 was significantly improved so that Ag 3 PO 4 /TiO 2 @MoS 2 (3.5 wt%) presented higher photocatalytic activity. More than 92% Methyl orange and Methylene blue were photodegraded over Ag 3 PO 4 /TiO 2 @MoS 2 (3.5 wt%) in 12 min and 5 min, respectively. More importantly,TiO 2 @MoS 2 could play the role of ‘wire’ to guide electrons captured by MoS 2 and quickly transferred electrons into solution so that the recombination of electron-hole pairs and the reduction of silver irons were effectively restrained. Thus, Ag 3 PO 4 /TiO 2 @MoS 2 (3.5 wt%) exhibited excellent anti-photocorrosion performance. Even after 10 cycling runs, Ag 3 PO 4 /TiO 2 @MoS 2 (3.5 wt%) could degrade 75% and 92% of oxytetracycline and enrofloxacin, respectively, whereas Ag 3 PO 4 degraded 23% and 44%. In addition, the possible photodegradation pathways of oxytetracycline and enrofloxacin were proposed, demonstrating that the photodegradation mechanisms involving oxidizing/shedding of functional groups firstly and opening the ring sequentially. Further detection of reactive oxidative species indicated that holes were the main active oxidizing species involved in the photocatalytic reaction process. Thus, Ag 3 PO 4 /TiO 2 @MoS 2 (3.5 wt%) is a promising photocatalyst for photodegradation of organic pollutants in the environmental protection.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Xuanwen Liu,Juanjuan Xu,Zhiyuan Ni,Renchao Wang,Junhua You,Rui Guo
The debated photocatalytic mechanism in the photocatalyst composite Ag 3 PO 4 /WO 3 is explored by analyzing the electron flow direction between Ag 3 PO 4 and WO 3 . Cubic phase WO 3 nanosheets with a thickness of 10–20 nm are prepared using the sintering method at 200 °C and decorated by cubic Ag 3 PO 4 particles using a practical deposition-precipitation method. Pure WO 3 shows a strong adsorption activity for rhodamine B (RhB) and methylene blue (MB), but no adsorption activity for methyl orange (MO) and it shows no photocatalytic activity on these three dye molecules. Pure Ag 3 PO 4 has no adsorption activity on RhB but shows a strong photocatalytic activity on RhB under visible light irradiation. As-prepared AW-x composites with different weight ratios show no adsorption activity but a high photocatalytic activity. However, after heat-treatment at 200 °C for 24 h, the composite catalysts show both a strong adsorption and photocatalytic activities on RhB. The results provide an indirect evidence that the electron flow direction is from WO 3 to Ag 3 PO 4 , which thus supports the Z-scheme photocatalytic mechanism.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
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.
研究领域:
环境科学
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材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2019
·Vol. 93
·期 7
·1343-1348
·
IF 0.581
Liang An,Zhao Xiaolian,Xu Chengkang,Yan Zhaoxiong,Yang Zhihua,Xu Zhihua
Abstract In this work, magnetically separable and recyclable γ-Fe 2 O 3 /HAp/Ag 3 PO 4 composite microsheets were prepared by hydrothermal and in-situ ion-exchange methods, in which photoactive Ag 3 PO 4 nanoparticles and magnetic γ-Fe 2 O 3 nanoparticles are distributed on the hydroxyapatite (HAp) microsheets. Characterization of the samples was performed by XRD, FE-SEM, EDS, FT-IR, and VSM. The photocatalytic performance of the samples was checked by investigating the degradation process of four different organic dyes under visible-light irradiation. Photocatalytic experiments reveal that all γ-Fe 2 O 3 /HAp/Ag 3 PO 4 samples show certain photocatalytic activities for the degradation of OII, and the degradation rate is different when diverse γ-Fe 2 O 3 /HAp/Ag 3 PO 4 samples are added into the OII solution. FHA-4 exhibits the highest degradation rate, and it could degrade different organic dyes, which means it has the potential to be applied into the treatment of complex wastewater containing different organic dyes. In addition, FHA-4 exhibits ferromagnetic feature, and can be easily separated from water by an external magnetic field.
研究领域:
材料科学
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环境科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
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
研究领域:
环境科学
·
材料科学
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纳米技术
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太阳能
✓ 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）