CAJ | 학술논문

文中采用溶胶-凝胶法，以正硅酸乙酯（TEOS）为硅源，氨水为催化剂，醇为溶剂，制备了 SiO2微球，并研究了正硅酸乙酯添加方式、溶剂类型、反应温度对其形貌和粒径的影响。通过 SEM，XRD，FT - IR，UV - Vis 测试分析 SiO2微球的形貌、结构、成分以及光学性能。结果表明，正硅酸乙酯水解对醇溶剂有选择性，乙醇作为溶剂合成 SiO2的分散性和球形较好，溶剂类型对 SiO2紫外吸收影响不大，SiO2对200~250 nm 紫外线吸收最强。逐步滴定法更利于 SiO2的合成，而 TEOS 添加方式对其非晶化程度影响不大。温度变化会影响氨水催化效率，进而会影响生成 SiO2的粒径。
문중채용용효-응효법，이정규산을지（TEOS）위규원，안수위최화제，순위용제，제비료 SiO2미구，병연구료정규산을지첨가방식、용제류형、반응온도대기형모화립경적영향。통과 SEM，XRD，FT - IR，UV - Vis 측시분석 SiO2미구적형모、결구、성분이급광학성능。결과표명，정규산을지수해대순용제유선택성，을순작위용제합성 SiO2적분산성화구형교호，용제류형대 SiO2자외흡수영향불대，SiO2대200~250 nm 자외선흡수최강。축보적정법경리우 SiO2적합성，이 TEOS 첨가방식대기비정화정도영향불대。온도변화회영향안수최화효솔，진이회영향생성 SiO2적립경。
SiO2 particles were synthesized by sol-gel method,using tetraethoxy silane(TEOS)as silica source, ammonia as catalyst and alcohol as solvent. The influence of different adding methods,alcohols and reaction tem-peratures on SiO2 particles was studied. The morphology,structure,composition and absorption spectra of the as-obtained SiO2 particles were characterized by SEM,XRD,FT - IR and UV - Vis spectroscopy. The results re-vealed that hydrolysis of tetraethoxy silane is selective to alcohol solvent,dispersity and sphericity of SiO2 are best using ethanol as solvent,different kinds of solvents do not have a certain effect on the ultraviolet rays absorbance of SiO2 and the biggest absorbance is 200 ~ 250 nm. Gradual dropwise additon method is much more beneficial to the formation of SiO2 ,different addition manners of TEOS do not influence the non-crystalline. The catalytic effi-ciency of ammonia will be affected because of different temperatures,the particle size will change with the change of the reaction temperature.