APPLIED SURFACE SCIENCE
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2018
·
IF 4.439
Ayyakannu Sundaram Ganeshraja,Kaixin Zhu,Kiyoshi Nomura,Junhu Wang
The hierarchical silver chloride loaded tin-doped titania (AgCl@Sn-TiO 2 ) microspheres were first time prepared by a hydrothermal method and annealing at different temperatures. The catalyst showed the enhanced visible light photocatalytic activity as compared to the plasmonic photocatalysts of AgCl and Ag/AgCl, and commercial Degussa P25 (TiO 2 ). The improved efficiency is considered to local surface plasmonic resonance (AgCl could reduce to Ag 0 during photocatalytic reaction) in enhanced broad band visible light absorption in addition to the characteristics of heterojunction between Sn-TiO 2 and AgCl NPs. Moreover, the surface and bulk properties of as-synthesized samples were analyzed by 119 Sn Mössbauer spectroscopy. The magnetic property of the bulk was studied as a function of magnetic field with different temperatures. These results signify the clear details of the magnetic and visible light photocatalytic activities of hierarchical AgCl@Sn-TiO 2 microspheres.
研究领域:
材料科学
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环境科学
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纳米技术
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2016
·
IF 5.267
Peng Tan,Yan-Hua Li,Xiao-Qin Liu,Yao Jiang,Lin-Bing Sun
Silver (Ag)-based nanoparticles are one type of highly effective antimicrobial widely used in medical devices, consumer products, and wound dressing. Although Ag(I) rather than Ag(0) is the active species in antibacterial processes, the use of Ag(I) as antibacterial materials is hindered by its instability toward light irradiation. In this paper, we report the fabrication of core–shell AgCl@SiO2 nanoparticles, which comprise a core of AgCl nanoparticles and a shell of porous silica, for antibacterial applications for the first time. The porous silica shells not only enhance the stability of AgCl by preventing the core from direct light irradiation but also allow active Ag(I) to pass through continuously to inhibit the growth of bacteria. It is worth noting that the synthesis is achieved by a facile one-pot method in which the surfactant hexadecyltrimethylammonium chloride used for the formation of AgCl nanoparticles also acts as a structure-directing agent in the subsequent creation of porous silica. Our results show that the obtained AgCl@SiO2 nanoparticles exhibit well-defined core–shell structure and are highly efficient in the growth inhibition of Escherichia coli. More importantly, the stability of Ag(I) toward light irradiation is greatly enhanced by the protection of the silica shell. The convenient fabrication, well-defined core–shell structure, and enhanced stability make AgCl@SiO2 nanoparticles highly promising for antibacterial applications.
研究领域:
材料科学
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微生物学
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医学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2017
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IF 3.387
Ziyuan Jiang,Jiaqi Pan,Beibei Wang,Chaorong Li
The two dimensional(2D) Z-scheme AgCl/Ag/Ca/TiO 3 nano-heterojunction is synthesized via simple preparation of hydrothermal-chemical co-deposition method. The results of SEM, EDS, elemental mapping, XRD, TEM, XPS and Raman shift imply that the AgCl/Ag nanoparticles have deposited on the surfaces of CaTiO 3 nanosheets successfully. Compared with the unmodified samples, the photocatalytic activity of the as-prepared 2D AgCl/Ag/CaTiO 3 nano-heterojunction exhibits a remarkable enhancement by the hydrogen production. Further, the photocatalytic process has been studied and the mechanism of the photocatalytic hydrogen production enhancement has been provided, which could be ascribed to the Z-scheme heterojunction and 2D lamellar structure of the CaTiO 3 .
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 29
·5116-5123
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IF 3.545
Jiye Wang,Yazhou Qin,Qiaocui Shi,Luhong Wen,Lei Bi
The controllable preparation of crystals is a prerequisite for exploring their shape-dependent physicochemical properties. Herein, AgCl crystals with different morphologies including octahedron, trapezohedron (TPH), 12-pod and hexapods with mace pods were successfully prepared by a one-pot synthesis method. In the preparation process, ethylene glycol (EG) was used as a solvent and AgNO3 was used as a precursor of Ag+. In particular, the ionic liquid poly(diallyldimethylammonium chloride) (PDDA) not only acted as a Cl− ion precursor but also as a morphology-controlled stabilizer. We further explored the effects of temperature, ligand and precursor concentration on AgCl crystal growth. Moreover, we investigated the effect of Cl− concentration on the morphology of AgCl by adding different amounts of NaCl. We found that under the condition of the lower concentrations of Cl−, {111}-bound octahedral AgCl crystals will transform into TPH enclosed with the {311} facet as the concentration of Cl− ions increases. However, at medium concentrations of Cl−, {111}-bound octahedral AgCl crystals will transform into 3D 12-pod AgCl crystals as the concentration of Cl− ions increases. Under the condition of higher concentrations of Cl−, {111}-bound octahedral AgCl crystals will transform into hexapods with mace pods AgCl crystals as the concentration of Cl− ions increases. According to the experimental results, we proposed the growth mechanism of AgCl microcrystals. This work not only provides a new method for the synthesis of AgCl crystals with a tunable shape, but also helps to understand the crystal growth mechanism.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2018
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IF 2.873
Aijun Cai,Aiying Guo,Liqaing Du,Yanling Qi,Xiuping Wang
In this paper, poplar leaf is used as a template to synthesize hierarchical AgCl-Ag-ZnO composites via a calcination method. Zn(NO 3 ) 2 and AgNO 3 are selected as precursors. During the calcination of the templates, Zn 2+ ions react with oxygen to produce ZnO nanoparticles (NPs), Cl − ions in leaf cells combine with the external Ag + ions to form AgCl, and Ag + ions are reduced by reducing agents in leaf to Ag NPs. The morphology, structure and visible-light response of the as-prepared hierarchical AgCl-Ag-ZnO composites are determined. The composites exhibit a strong photocatalytic activity toward the degradation of Rhodamine B (RhB) under visible-light irradiation. The AgCl-Ag-ZnO composites display an enhanced photocatalytic activity, compared with the leaf-templated AgCl-Ag and ZnO. A photocatalytic mechanism is proposed, based on the efficient separation of photoexcited electron-hole pairs due to the surface plasmon resonance (SPR) effect of metal Ag.
研究领域:
材料科学
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化学
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环境科学
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产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2016
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IF 2.759
Xueyi Guo,Duo Deng,Qinghua Tian
AgCl nanocrystals with cubic, spherical and octahedral morphology, and tunable size of 0.3– 2 μm have been successfully prepared by a one pot hydrothermal method using cetyltrimethyl ammonium chloride (CTAC) as Cl − source and stabilizer . Besides, the unconventional plate-like AgCl particles can be obtained by the addition of polyvinyl pyrrolidone (PVP). Photocatalytic tests show that the as-prepared AgCl photocatalysts with cubic, octahedral and plate morphology all exhibit stable photocatalytic efficiency, and the plate AgCl nanocrystals exhibits higher photocatalytic activity than cubic and octahedral AgCl nanocrystals owing to its high-index facets, stacking faults and twin defects, making it a promising photocatalyst applied in environmental management.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2017
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IF 3.133
Xueyan Li,Di Wu,Qingzhi Luo,Rong Yin,Jing An,Sijie Liu,Desong Wang
The novel ternary cyclized polyacrylonitrile (CPAN)/Ag/AgCl composites were successfully synthesized by a facile precipitation and photo-assistant reduction method. The CPAN/Ag/AgCl particles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy, UV–vis diffuse reflectance spectroscopy (UV–vis DRS), photoluminescence spectroscopy (PL), electrochemical impedance spectra (EIS) and photocurrent time (EI) measurement. The photocatalytic activities of the samples were investigated through the decomposition of methyl orange (MO) and rhodamine B aqueous solution under visible-light irradiation. The results showed that the CPAN/Ag/AgCl photocatalysts displayed much higher visible-light photocatalytic activity than Ag/AgCl, and the reaction rate constant of the MO degradation catalyzed by CPAN/Ag/AgCl is about 3 times of that by Ag/AgCl. It is proposed that the photogenerated holes h + and O 2 − played important roles in the photocatalytic degradation of MO in the presence of CPAN/Ag/AgCl composites under visible light irradiation.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2017
·Vol. 43
·期 11
·6407-6419
·
IF 1.369
Wu Meng,Yan Luting,Li Jiali,Wang Lei
Ag/AgCl is a visible-light plasmonic photocatalyst that has attracted considerable attention because of its high visible-light absorption and activity owing to the surface plasmon resonance of noble-metal nanoparticles. In this study, Ag/AgCl/ZnO tetrapod composite was prepared by introducing ZnO tetrapods into Ag/AgCl prepared by a polydopamine reduction route. Ag/AgCl was densely deposited on the three-dimensional support framework provided by the ZnO tetrapods. The framework possessed a certain degree of porosity, thereby improving the specific surface area of the Ag/AgCl/ZnO composite. The interaction of ZnO with Ag/AgCl further increased the separation and transfer of electron–hole pairs. The Ag/AgCl/ZnO composite showed excellent photocatalytic activity and good stability. Under xenon lamp irradiation for 20 min, degradation of rhodamine B reached 90%. After four recycling tests, degradation remained stable without any sign of reduction. Ag/AgCl/ZnO tetrapod composite is shown to be a kind of green photocatalyst offering high activity, good stability, and recyclability.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Feihu Mu,Chunxia Liu,Yun Xie,Shijian Zhou,Benlin Dai,Dehua Xia,Haibao Huang,Wei Zhao,Cheng Sun,Yan Kong,Dennis Y.C. Leung
A novel metal–organic framework (MOF)-derived rodlike AgCl/Ag/In 2 O 3 plasmonic photocatalyst has been successfully prepared by electrostatic self-assembly, co-precipitation, in-situ photoreduction, and calcination. The photocatalytic activity of the samples was systematically investigated by photocatalytic tetracycline (TC) oxidation and Cr(VI) reduction under visible light irradiation. Among the as-prepared samples, AgCl/Ag/In 2 O 3 -2 displayed the most effective photocatalytic activity. For photocatalytic TC oxidation, the apparent rate constant of AgCl/Ag/In 2 O 3 -2 was 0.5036 min −1 , which was 2.7, 6.5, and 1.8 times higher than that of In 2 O 3 (0.1845 min −1 ), AgCl/In 2 O 3 (0.1544 min −1 ) and Ag/In 2 O 3 (0.2850 min −1 ), respectively. In addition, AgCl/Ag/In 2 O 3 -2 also exhibited the highest activity for photocatalytic Cr(VI) reduction, and the photocatalytic Cr(VI) reduction rate of AgCl/Ag/In 2 O 3 -2 in 3hrs could reach 94.8%. The superior photocatalytic activity was due to the enhanced absorption in the visible light region caused by localized surface plasmon resonance (LSPR) and the efficient interfacial charge migration and separation in AgCl/Ag/In 2 O 3 samples. Moreover, the intermediates formed in the photocatalytic TC oxidation were identified by GC–MS. Finally, a series of characterizations and simulations (density functional theory, cambridge serial total energy package, and finite difference time domain) were carried out to demonstrate the plasmonic Z-scheme photocatalytic mechanism.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
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IF 6.2
Jun Liu,Hui Wang,Wen-Yao Zhu,Heng-Xue Xie,Xin Li,Wen-Juan Li,Ge Bai,Meng-Jie Chang,Xiao-Jiao Chai,Hui-Ling Du,Shi-Jie Song
We present a novel method to facilely prepare magnetically recoverable AgCl/Fe 3 O 4 @MIL-100(Fe) (ACFM) nanostructures for photocatalytic degradation of rhodamine B (RhB). The ACFM was directly prepared via a simple successive ionic layer adsorption and reaction (SILAR) deposition of MIL-100(Fe) on solvothermal synthesized Ag/Fe 3 O 4 nanoparticles , in which process Ag was completely oxidized into AgCl concurrent with the formation of MIL-100(Fe). The ACFM prepared with 15 SILAR cycles exhibits 92.9% efficiency towards photodegrading RhB within 30 min under visible light illumination, which is higher than that of the individual structure of AgCl/Fe 3 O 4 , Ag/Fe 3 O 4 @MIL-100(Fe) or Fe 3 O 4 @MIL-100(Fe). The remarkably enhanced photocatalytic performance is attributed to the abundant active sites and sufficient visible light response of MIL-100(Fe), as well as effective charge separation at the heterojunction interface between AgCl and MIL-100(Fe). Furthermore, the obtained ACFM can be quickly separated from the pollutant solution with a magnet and possesses good stability for recycling photocatalysis . In light of the study, the ACFM nanostructures are believed to be applied as promising photocatalysts for practical applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2019
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IF 3.25
Cuiling Ai,Sikai Yang,Fan Zhang,Xiangwen Shao,Junge Xu
Ag/AgCl-GO composite was fabricated by deposition–precipitation method and photoplasmic reduction method at room temperature. The resulting products were characterized by XRD, XPS, SEM, TEM, Zeta potential and UV–Vis DRS. The results indicated that the samples were composed of Ag, AgCl and graphene oxide (GO). During the photoreduction, the crystallinity of Ag 0 particles gradually increased with prolonging the time of UV irradiation, then remained stable after 90 min. The addition of GO had little effect on the crystal structure of Ag/AgCl, however, this reduced the particle size and enhances the dispersibility of the composite. After 100 min of visible light irradiation, the degradation efficiency of rhodamine B (RhB) reached 98.43%. Therefore, the Ag/AgCl-GO photocatalyst exhibited significant photocatalytic activity during the degradation of RhB under visible light.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 6
·3888-3899
·
IF 3.9
Shuai Fu,Zhiliang Chu,Zhiquan Huang,Xiaomei Dong,Junhong Bie,Zhe Yang,Huijie Zhu,Wanyu Pu,Wanzhe Wu,Bo Liu
A facile Z-scheme AgCl/BiOCl heterojunction photocatalyst with oxygen vacancies was fabricated by a water-bath method. The structural, morphological, optical and electronic properties of as-synthesized samples were systematically characterized. The oxygen vacancies were confirmed by EPR, which could optimize the band-gap of the AgCl/BiOCl heterojunction and improve the photo-induced electron transfer. The optimized AgCl/BiOCl heterojunction showed excellent photocatalytic degradation efficiency (82%) for tetracycline (TC). Simultaneously, E. coli was completely inactivated within 60 min due to the AgCl/BiOCl heterojunction. The elevated catalytic activity of the optimal AgCl/BiOCl heterojunction was ascribed to the synergistic effect of the enhanced light absorption and effective photoinduced charge carrier separation and transfer. Moreover, the degradation efficiency of the AgCl/BiOCl heterojunction towards ofloxacin, norfloxacin and Lanasol Red 5B was 73%, 74% and 96%, respectively. The experimental factors for the degradation efficiency of TC were also studied. Furthermore, active species trapping experiments indicated that superoxide radicals (˙O2−) were the main reactive species, and the Z-scheme charge transfer mechanism helped to improve the photocatalytic activity.
研究领域:
环境科学
·
材料科学
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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）