Formation of uniform carrot-like Cu31S16–CuInS2 heteronanostructures assisted by citric acid at the oil/aqueous interface
Formation of uniform carrot-like Cu31S16–CuInS2 heteronanostructures assisted by citric acid at the oil/aqueous interface
复制标题
柠檬酸辅助在油/水界面形成均匀的胡萝卜状 Cu31S16-CuInS2 异质纳米结构
DOI：
10.1039/c7dt04274d
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发表时间：
2018
影响因子：
4
通讯作者：
Feng Teng
中科院分区：
文献类型：
--
作者：
Yongjie Li;Aiwei Tang;Zhenyang Liu;Lan Peng;Yi Yuan;Xifeng Shi;Chunhe Yang;Feng Teng
提出了一种在油/水界面制备Cu31S16-CuInS2异质结(HNS)的简单两相方法，由于水相中铟离子和羟基离子的反应，产物中经常会生成In(OH)3相。为了防止In(OH)3相的形成，在水相中加入柠檬酸，以协助在油/水界面合成均匀的胡萝卜状.Cu31S16-CuInS2半导体HNS。通过控制柠檬酸用量和CuInS2HNS的前驱体比例，Cu31S16-CuInS2HNS的形貌可以从蘑菇状向胡萝卜状转变，柠檬酸的存在对合成高质量的Cu31S16-CuInS2HNS起关键作用。柠檬酸的存在抑制了In(OH)3相的形成，这是由于铟(III)-柠檬酸络合物的形成。通过监测Cu31S16-CuInS2HNS的形貌和物相随反应时间的变化，研究了Cu31S16-CuInS2HNS的形成机理。结果表明，Cu31S16-CuInS2HNS首先形成了Cu31S16晶种，然后阳离子交换反应引导了随后的各向异性生长。
A simple two-phase strategy was developed to prepare Cu31S16–CuInS2 heterostructures (HNS) at the oil/.aqueous interface, in which the In(OH)3 phase was often obtained in the products due to the reaction.between indium ions and hydroxyl ions in the aqueous phase. To prevent the formation of the In(OH)3.phase, citric acid was incorporated into the aqueous phase to assist in the synthesis of uniform carrot-like.Cu31S16–CuInS2 semiconductor HNS at the oil/aqueous interface for the first time. By manipulating the.dosage of citric acid and Cu/In precursor ratios, the morphology of the Cu31S16–CuInS2 HNS could be.tailored from mushroom to carrot-like, and the presence of citric acid played a critical role in the synthesis.of high-quality Cu31S16–CuInS2 HNS, which inhibited the formation of the In(OH)3 phase due to the formation.of the indium(III)–citric acid complex. The formation mechanism was studied by monitoring the.morphology and phase evolution of the Cu31S16–CuInS2 HNS with reaction time, which revealed that the.Cu31S16 seeds were first formed and then the cation-exchange reaction directed the subsequent anisotropic.growth of the Cu31S16–CuInS2 HNS.