DPVA/Ag_3PO_4纳米复合材料的制备与表征研究
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摘要
以Ag_3NO_3和Na_2HPO_4为原料,通过沉淀法制备Ag_3PO_4。Ag_3PO_4与聚乙烯醇超声吸附并通过热处理制备了DPVA/Ag_3PO_4复合材料。采用SEM、XRD、XPS和UV-Vis DRS等手段对DPVA/Ag_3PO_4复合材料的形貌、晶型、元素组成和光吸收能力进行了表征分析。结果显示,经过DPVA的复合修饰之后的Ag_3PO_4与纯Ag_3PO_4相比,晶型、粒径和形貌基本没有发生改变,DPVA附着在磷酸银表面,样品的光吸收性能在可见光区得到了明显提高。当Ag_3PO_4与PVA质量比为10000∶1,热处理温度为180℃,热处理时间为1 h时,所制样品的光催化活性最佳。
Ag_3PO_4 particles were prepared using Ag_3NO_3 and Na_2HPO_4 as raw materials by precipitation method. DPVA/Ag_3PO_4 composites were prepared by ultrasonic absorption and heat-treated. The morphology, crystal shape, element composition and light absorption capacity of DPVA/Ag_3PO_4 composites were analyzed by means of SEM,XRD,XPS and UV-Vis DRS. The results show that the crystal shape,particle size and morphology of DPVA/Ag_3PO_4 don't change comparing Ag_3PO_4 and DPVA is attached to the surface of silver phosphate. The light absorption performance of the sample is obviously improved in the visible region. The optimum preparation condition is found that the mass ratio of silver phosphate and PVA is 10000∶ 1,and the heat-treated temperature of 180 ℃,the heat-treated treatment time for 1 h.
Ag_3PO_4 particles were prepared using Ag_3NO_3 and Na_2HPO_4 as raw materials by precipitation method. DPVA/Ag_3PO_4 composites were prepared by ultrasonic absorption and heat-treated. The morphology, crystal shape, element composition and light absorption capacity of DPVA/Ag_3PO_4 composites were analyzed by means of SEM,XRD,XPS and UV-Vis DRS. The results show that the crystal shape,particle size and morphology of DPVA/Ag_3PO_4 don't change comparing Ag_3PO_4 and DPVA is attached to the surface of silver phosphate. The light absorption performance of the sample is obviously improved in the visible region. The optimum preparation condition is found that the mass ratio of silver phosphate and PVA is 10000∶ 1,and the heat-treated temperature of 180 ℃,the heat-treated treatment time for 1 h.
引文
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[3]Bai S,Shen X P,L H W,et al.Assembly of Ag3PO4nanocrystals on grapheme based nanosheets with enhanced photocataltic performance[J].Journal of Colloid and Interface Science,2013,405:1-9.
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[5]Zhang F F,Lu S M,Yang P,et al.Synthesis of SiO2/Ag Cl and SiO2/Ag3PO4noncomposites via replacing reaction in situ towards enhanced photocatalysis[J].Journal of Nanoscience nanotechnology,2016,16(9):9794-9799.
[6]Zhang J G,Bi H P,He G Y,et al.Fabrication of Ag3PO4-PANI-GO composites with high visible light photocatalytic performance and stability[J].Journal of Environmental Chemical Engineering,2014,2(2):952-957.
[7]Zhang C P,Liu J.Stable chitin whisker/Ag3PO4composites photocatalyst with enhanced visible light induced photocatalytic activity[J].Materials Letters,2017,196:91-94.
[8]Lei P,Wang F,Gao X,et al.Immobilization of Ti O2nanoparticles in polymeric substrates by chemical bonding for multi-cycle photodegradation of organic pollutants[J].Journal of Hazardous Materials,2012,227-228:185-194.
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