通过在已预处理的珍珠岩上进行硅(Si)掺杂二氧化钛(TiO2)纳米材料的负载实验,探究了珍珠岩的不同酸处理工艺及不同Si掺杂量对TiO2纳米材料结晶性能的影响。分别通过扫描电镜(SEM)、红外光谱(FT-IR)和X射线衍射(XRD)等手段对珍珠岩的形貌和羟基化结构进行分析、负载Si掺杂TiO2纳米材料元素含量和物相进行表征。结果表明:珍珠岩经浓硫酸和双氧水处理后会在其表面产生O—H基团,并且当V(H2SO4)∶V(H2O2)=42∶18时在珍珠岩表面产生O—H基团的量较多,表面大量O—H基的存在使其负载能力增强;Si的掺杂会抑制金红石型TiO2晶体的生成,并且当Si∶Ti= 1∶7时,TiO2纳米材料的物相为锐钛矿型且结晶性能最好。
Through TiO2 nanomaterials were doped by Si on the expanded perlite which after the pretreatment in loading experiment,the effect of different acid treatment technology of expanded perlite and different Si doping amount on the properties of TiO2 nanomaterials crystallization was explored.With SEM technique,FT-IR and XRD,analysis for the morphology and hydroxylation structure of expanded perlite,the element content and phase of loaded Si doping TiO2 nanomaterials were characterized.The results shown that after concentrated sulfuric acid and hydrogen peroxide treatment,the expanded perlite produced O—H group on its surface,and when V(H2SO4)∶V(H2O2)= 42∶18,the amount of O—H group produced on the surface of expanded perlite was more.The doped Si suppressed the formation of rutile TiO2 crystal,and when the Si∶Ti=7∶1,phase of TiO2 nanomaterials was anatase type and had best crystallization performance.
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