In-situ growth of high-content 1T phase MoS2 confined in the CuS nanoframe for efficient photocatalytic hydrogen evolution

光催化 材料科学 相(物质) 化学工程 原位 催化作用 纳米技术 化学 有机化学 工程类
作者
Xu Xin,Yaru Song,Shaohui Guo,Youzi Zhang,Bilin Wang,Jiakang Yu,Xuanhua Li
出处
期刊:Applied Catalysis B-environmental [Elsevier BV]
卷期号:269: 118773-118773 被引量:122
标识
DOI:10.1016/j.apcatb.2020.118773
摘要

The large-scale synthesis of the metallic phase MoS2 (1 T MoS2) is important for enhancing the photocatalytic hydrogen evolution reaction (HER). However, it’s difficult to obtain a high-quality of 1 T MoS2, especially when integrated with other semiconductors for hetero nanomaterials. Herein, a one-step confined template method is proposed to obtain high-quality 1 T MoS2 in the CuS nanoframe (CuS–MoS2–1 T). During the synthesis, a unique porous Cu–Mo-based metal–organic framework (MOF), i.e., NENU-5 template has been adopted and in situ sulfurized, where 1 T MoS2 and CuS have been simultaneously obtained. Interestingly, we find that the confined pores of the CuS nanoframe inhibits the bulk growth of MoS2 to produce high-stability and large-scale 1 T MoS2 (a high concentration of ∼70 %). The obtained nanomaterial exhibits remarkable photocatalytic activity with the hydrogen production rate of approximately 9648.7 μmol g−1 h−1, which is much higher than other various newly developed photocatalysts reported early. This study develops a new strategy via MOF confined template for high-quality 1 T MoS2 production and achieves outstanding performance in the photocatalytic water splitting. This approach may also shed light on other similar confined templates for the praparation of high-quality metastable nanomaterials.
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