Search

Your search keyword '"Yang, Haitao"' showing total 15 results
Start Over Author "Yang, Haitao" Journal nanoscale
15 results on '"Yang, Haitao"'

14. Controllable fabrication and photocatalytic performance of nanoscale single-layer MoSe 2 islands with substantial edges on an Ag(111) substrate.

Author

Lu J, Niu G, Ren X, Bao D, Chen H, Yang H, Lin X, Du S, and Gao HJ

Abstract

Two-dimensional (2D) transition metal dichalcogenides (TMDs) are emerging as new electrocatalysts and photocatalysts. The edge sites of 2D TMDs show high catalytic activity and are thus favored at the catalyst surface over TMD inert basal planes. However, 2D TMDs that predominantly expose edges are thermodynamically unfavorable, limiting the number of edge sites at the surface. Herein, we demonstrate a controllable synthesis strategy of single-layer 2D MoSe 2 islands with a lateral size of approximately 5-12 nm on an Ag(111) substrate by pre-deposition of excess Se atoms. The surplus Se atoms react with the Ag(111) substrate and form silver selenide compounds to separate MoSe 2 islands and further prevent MoSe 2 islands from growing up. The nanoscale MoSe 2 islands greatly increase the ratio of exposed edge sites relative to the basal plane sites, which leads to excellent photocatalytic activity for the degradation of a methylene blue (MB) organic pollutant. This work paves the way to limit the size of 2D TMDs at the nanoscale and enables new opportunities for enhancing the catalytic activity of 2D TMD materials.

Published
2021
Full Text
View/download PDF

15. Controlled growth of LaFeO3 nanoparticles on reduced graphene oxide for highly efficient photocatalysis.

Author

Ren X, Yang H, Gen S, Zhou J, Yang T, Zhang X, Cheng Z, and Sun S

Abstract

Using reduced graphene oxide (rGO) as a template and high temperature sol-gel chemistry, we have prepared LaFeO3 nanoparticles (NPs). The 15 nm LaFeO3 NPs have a bandgap of 1.86 eV and the LaFeO3-rGO can function as an efficient catalyst for degradation of methylene blue (MB) or Rhodamine B (RhB) under visible-light irradiation with the electron transfer from the dye to hole dominating the oxidation process. The reported synthesis offers a general approach to perovskite-type NPs for efficient photocatalytic applications.

Published
2016
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results