CAJ | 학술논문

以 Na2SnO3和 CO2为反应物，十六烷基三甲基溴化铵(CTAB)为稳定剂，在温和条件下合成粒径小于10 nm的SnO2纳米晶。CO2作为酸性气体，有利于精确调控Na2SnO3溶液的pH值，Na2SnO3价廉且性质稳定，易于操作。研究Na2SnO3浓度、CTAB浓度、熟化温度和熟化时间等对产物的影响。结果表明，随着Na2SnO3浓度的增加、熟化温度的升高和熟化时间的延长，粒径变小，粒子形成过程可由静电作用机理解释。SnO2纳米晶具有良好的光催化活性，且随着粒径的减小，其活性增大。
이 Na2SnO3화 CO2위반응물，십륙완기삼갑기추화안(CTAB)위은정제，재온화조건하합성립경소우10 nm적SnO2납미정。CO2작위산성기체，유리우정학조공Na2SnO3용액적pH치，Na2SnO3개렴차성질은정，역우조작。연구Na2SnO3농도、CTAB농도、숙화온도화숙화시간등대산물적영향。결과표명，수착Na2SnO3농도적증가、숙화온도적승고화숙화시간적연장，립경변소，입자형성과정가유정전작용궤리해석。SnO2납미정구유량호적광최화활성，차수착립경적감소，기활성증대。
Tin oxide nanocrystals with diameters smaller than 10 nm were synthesized using Na2SnO3 and CO2 as reactants and cetyltrimethylammonium bromide (CTAB) as stabilizer under mild conditions. As a mild acidic gas, CO2 is favorable for the accurate adjustment of pH value of Na2SnO3 solution. Stannate salt is stable, cheap and easy in operation. The effects of Na2SnO3 concentration, CTAB concentration, aging temperature, and aging time on the nanocrystals were studied. It was found that, with the increasing Na2SnO3 concentration, aging temperature and aging time, SnO2 nanocrystals size decreases. The formation of SnO2 nanocrystals can be interpreted by electrostatic-interaction mechanism. SnO2 nanocrystals show high photocatalytic activities in the degradation of Rhodamine B solution. The catalytic activity of small nanocrystals is higher than that of large ones.