直流电弧等离子体制备纳米SiC及其催化特性

发布时间：2018-03-17 07:10

本文选题：碳化硅　切入点：直流电弧等离子体　出处：《无机材料学报》2017年04期 　论文类型：期刊论文

【摘要】：利用工业块体硅为硅源,CH4为碳源,在含有H2和Ar混合气氛中,采用直流电弧等离子体法制备SiC纳米粒子。CH4含量影响SiC纳米粒子的化学组成和形貌。结果显示:产物中含有3C-SiC和6H-SiC两种物相,而在CH_4压力为0.005 MPa条件下制备的SiC纳米粒子还含有Si/SiC核壳结构。利用制备的SiC纳米颗粒作为催化剂,在恒光强下光电催化还原脱除2,4-二氯酚中的Cl原子。结果显示在 1.02 V偏压下光电催化180 min后,对2,4-二氯酚的去除效率达92.5%,SiC纳米粒子的吸附效率为19.6%。因此,SiC纳米颗粒可取代贵金属,作为低成本光电催化候选材料用于污水处理。
[Abstract]:Using industrial block silicon as silicon source and Ch _ 4 as carbon source, in the mixed atmosphere containing H _ 2 and ar, The content of SiC nanoparticles 路Ch _ 4 prepared by DC arc plasma method affects the chemical composition and morphology of SiC nanoparticles. The results show that there are 3C-SiC and 6H-SiC phases in the products. However, the SiC nanoparticles prepared under the CH_4 pressure of 0.005 MPa also contained the core-shell structure of Si/SiC. The prepared SiC nanoparticles were used as catalysts. The reduction of Cl atoms in 2O4-dichlorophenol was carried out under constant light intensity. The results showed that under the bias voltage of 1.02 V, the Cl atom was photocatalysed for 180 min. The removal efficiency of 2% 4-dichlorophenol is 92.5% and the adsorption efficiency of sic nanoparticles is 19.60.Therefore, sic nanoparticles can replace precious metals and be used as low-cost photocatalytic candidate materials for wastewater treatment.
【作者单位】：大连理工大学教育部三束材料改性重点实验室材料科学与工程学院;大连理工大学能源材料及器件实验室材料科学与工程学院;大连理工大学工业生态与环境工程实验室环境学院;
【基金】：国家自然科学基金(51171033,51271044) 国家中央高校基本科研业务费专项资金(DUT15LAB05,DUT16LAB03)~~
【分类号】：TQ426;TB383.1

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