一步合成水溶性 AgInS2 和 ZnS-AgInS2 复合纳米晶及其光催化活性。
One-step synthesis of water-soluble AgInS2 and ZnS-AgInS2 composite nanocrystals and their photocatalytic activities.
机构信息
Shanghai Key Laboratory of Functional Materials Chemistry, Department of Chemistry, East China University of Science and Technology, Shanghai 200237, PR China.
出版信息
J Colloid Interface Sci. 2012 Jul 1;377(1):27-33. doi: 10.1016/j.jcis.2012.03.074. Epub 2012 Apr 7.
Water-soluble AgInS(2) (AIS) nanocrystals (NCs) have been synthesized for the first time in the presence of GSH as capping ligand in aqueous media at low temperature of 95 °C. The investigations on the effects of various experimental variables including pH value, GSH/In, In/Ag, and In/S ratios on the optical properties showed that the long time, pH of 8.5 and large GSH/In ratio could increase the intensity of the shorter wavelength (position not changed) emission, while the ratios of In/Ag and In/S could affect the emission wavelength and intensity as well as the intensity ratio of longer to shorter wavelength emission with the shorter wavelength emission tunable from 560 to 660 nm. After modifying with ZnS, the obtained ZnS-AgInS(2) (ZAIS) NCs show both slightly blue-shifted stronger PL emission and higher quantum yield increasing to 5 fold. The obtained AIS and ZAIS NCs showed promising photocatalytic activities in the degradation of rhodamine B.
首次在 95°C 的低温下，以 GSH 为稳定剂，在水相中合成了水溶性 AgInS(2)（AIS）纳米晶体（NCs）。研究了各种实验变量（包括 pH 值、GSH/In、In/Ag 和 In/S 比）对光学性质的影响，结果表明，较长时间、pH 值为 8.5 和较大的 GSH/In 比可以增加较短波长（位置不变）发射的强度，而 In/Ag 和 In/S 的比例也可以影响发射波长和强度以及长波到短波发射的强度比，短波发射可从 560nm 调谐到 660nm。用 ZnS 修饰后，得到的 ZnS-AgInS(2)（ZAIS）NCs 表现出略微蓝移的更强的 PL 发射和高达 5 倍的量子产率增加。所得到的 AIS 和 ZAIS NCs 在罗丹明 B 的降解中表现出有前途的光催化活性。
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