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In(2)O(3) microbundles constructed with well-aligned single-crystalline nanorods: F127-directed self-assembly and
Zhipeng Li1, Hui Yan, Shiling Yuan
1Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Department of Chemistry, Shandong University, Jinan 250100, Shandong, PR China.
Abstract:
Hierarchical In(2)O(3) rod-like microbundles were fabricated via the Pluronic F127-(EO(106)PO(70)EO(106)-) assisted hydrothermal reaction followed by calcining the In(OH)(3) precursors. The results revealed that the In(2)O(3) microarchitectures were constructed with well-aligned one-dimensional (1D) single-crystalline nanorods with highly uniform morphologies and particular exposed facets. Structural analysis suggested that the In(2)O(3) nanorods were enclosed by {110} and {001} facets. The triblock copolymer acted as a structure-directing agent and played a key role in the formation of In(OH)(3) microbundles. The formation of the precursors In(OH)(3) microbundles was studied through contrastive experiments and computational simulation, which can be contributed to the soft-template-directed self-assembly mechanism. The gas sensing properties of the as-prepared In(2)O(3) microbundles were investigated. Compared to the samples prepared in the absence of F127, the In(2)O(3) microbundles exhibited a superior sensing performance toward 2-chloroethanol vapor, which can be explained by hierarchically ordered structures and exposed crystal surfaces.