title: Facile synthesis of novel MoS₂@SnO₂ hetero-nanoflowers and enhanced photocatalysis and field-emission properties.
abstract: A novel hierarchical MoS2@SnO2 hetero-nanoflower was successfully synthesized by a facile, two-step hydrothermal method without using any additives or surfactants. One possible growth mechanism of the hetero-nanostructure was presented in detail based on OH(-) ion-dependent experimental facts. Due to the formation of the p-n junctions and the increased specific surface area in the composites, an outstanding photocatalytic activity of the as-prepared sample was obtained by monitoring the photodegradation of methylene blue (MB). According to the data, after irradiation for 100 min, the remaining MB in solution is about 26% for MoS2 nanoflowers and 9.5% for MoS2@SnO2 hetero-nanoflowers. Moreover, an excellent field-emission performance was obtained from MoS2@SnO2 hetero-nanoflower relative to the pure MoS2 with the turn-on field decreasing from 4.2 V μm(-1) to 3.4 V μm(-1) and the threshold field decreasing from 6.2 V μm(-1) to 5.2 V μm(-1), which is mainly attributed to the increased field-emission points and MoS2-SnO2 heterojunction.
authors.affiliation: Key Laboratory of Polar Materials and Devices (Ministry of Education of China), Department of Electronic Engineering, East China Normal University, Shanghai, 200241, P. R. China. yk5188@263.net.
authors.forename: Jinzhu
authors.initials: J
authors.lastname: Li
authors.forename: Ke
authors.initials: K
authors.lastname: Yu
authors.forename: Yinghua
authors.initials: Y
authors.lastname: Tan
authors.forename: Hao
authors.initials: H
authors.lastname: Fu
authors.forename: Qingfeng
authors.initials: Q
authors.lastname: Zhang
authors.forename: Weitao
authors.initials: W
authors.lastname: Cong
authors.forename: Changqing
authors.initials: C
authors.lastname: Song
authors.forename: Haihong
authors.initials: H
authors.lastname: Yin
authors.forename: Ziqiang
authors.initials: Z
authors.lastname: Zhu