Au (gold) nanorod-Pt (platinum) nanoparticle-CdS (cadmium sulfide) composite photocatalyst and preparation and application thereof
A gold nanorod and platinum nanotechnology, applied in the field of photocatalyst materials, can solve the problem that the influence of the catalytic performance of composite photocatalysts has not been comprehensively studied, and achieve sustainable development, simple production process, photocatalytic activity and highly selective effect
Active Publication Date: 2018-12-21
FUZHOU UNIV
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Problems solved by technology
[0006] Although it has been reported before that semiconductor CdS-Au composites can exhibit excellent photocatalytic performance under ultraviolet or visible light irradiation, the influence of the SPR effect of Au on the catalytic performance of composite photocatalysts has not been fully studied.
Combining the SPR effect of Au with the co-catalyst effect of Pt to improve the photocatalytic activity of CdS semiconductors is rarely studied
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Embodiment 1
[0037] 1.1 Reagents and instruments
[0038] Cetyltrimethylammonium bromide (CTAB), silver nitrate (AgNO 3 ), sodium borohydride (NaBH 4 ), ascorbic acid (AA), hydrochloric acid solution (HCl, 37 wt%), sodium oleate (NaOL) were purchased from Sigma Aldrich Reagent Company; cadmium acetate (Cd(Ac) 2 2H 2 O), thiourea (TAA), chloroplatinic acid (H 2 PtCl 6 ), chloroauric acid (HAuCl 4), glycine (Gly) were purchased from Sinopharm Chemical Reagent Co., Ltd. The experimental water was deionized water. The main instruments are Bruker D8 X-ray powder diffractometer (Bruker, Germany), Cary-5000 UV-Vis-NIR spectrophotometer (Varian, USA), G2 F20S-TWIN transmission electron microscope (FEI, USA), ESCA Lab250X X-ray photoelectron spectroscopy (Thermo, USA), Edinburgh FL / FS900 fluorescence spectrophotometer (Edinburgh Instruments, UK), PrecisionPARC electrochemical workstation (Ametek, USA).
[0039] 1.2 Catalyst preparation
[0040] Preparation of Au NRs:
[0041] (1) Dispense...
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The invention belongs to the technical field of photocatalyst materials, in particular to a visible-near infrared response type Au (gold) nanorod-Pt (platinum) nanoparticle-CdS (cadmium sulfide) composite photocatalyst and preparation and application thereof. The composite photocatalyst is prepared by the following steps of using one-dimensional Au NRs (gold nanorod) as a framework, loading Pt nanoparticles at both ends, and coating a CdS semiconductor shell layer, so as to obtain the visible-near infrared response type Au-Pt@CdS composite photocatalyst. The Au-Pt@CdS composite photocatalyst is prepared by a two-step low-temperature seed growth regulating method, and is of a space-separated core-shell layer structure. The Au-Pt@CdS composite photocatalyst is applied to the proton reduction-coupled benzene-methanol oxidation reaction for the first time, and has the advantages that the catalyzing efficiency and product selectivity are high; the method is simple; by using the visible-nearinfrared light as drive energy to further obtain the clean energy source (hydrogen gas) and important chemical raw material (benzene-methanol), the sustained development of environments and energy sources is favorably performed.
Description
technical field [0001] The invention belongs to the technical field of photocatalyst materials, and specifically relates to a visible-near-infrared light-responsive gold nanorod-platinum nanoparticle-CdS composite photocatalyst (Au-Pt@CdS) and its preparation and application. Background technique [0002] The direct conversion of solar energy into chemical energy through artificial photosynthesis provides a green and environmentally friendly way to solve the energy and environmental crisis. The core issue of this advanced technology is to design efficient catalysts to maximize the absorption of sunlight to generate a large number of photogenerated carriers to drive redox reactions. However, most conventional semiconductor (TiO2, ZnO, CdS) catalysts have the following disadvantages: high recombination rate of electron-hole pairs, low quantum efficiency, and low solar energy utilization. The aforementioned drawbacks severely hamper the photocatalytic performance and potential...
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IPC IPC(8): B01J27/045C07C45/00C07C47/54
CPCC07C45/002B01J27/045B01J35/39C07C47/54
Inventor 徐艺军韩创
Owner FUZHOU UNIV