GaN-ZnO solid solution nanowire and preparation method and application thereof

Abstract

The invention discloses a GaN-ZnO solid solution nanowire and a preparation method and application thereof. The GaN-ZnO solid solution nanowire is 50-150nm in average diameter and 5-50micron in length, and the molar content of ZnO is 15-95%. The method includes: mixing GaN, Ga2O3 and ZnO powder, and adding into a container; mixing ZnO and graphite powder, and adding into another container; putting the two containers and a substrate into a small quartz tube with one end closed and one end open, putting the small quartz tube into a large quartz tube, vacuumizing, heating and feeding a carrier gas and nitrogen to obtain the solid solution nanowire growing on the substrate. The method is simple, reaction parameters are easy to control, the prepared GaN-ZnO solid solution nanowire is uniform in size, great in crystallization and excellent in performance in application as a catalyst to solar photocatalytic water splitting for hydrogen production, and the maximum hydrogen production rate reaches 1.3mmol.h<-1>.g<-1>.

Description

technical field [0001] The invention belongs to the field of semiconductor materials and nanotechnology, and relates to a solid solution nanowire, a preparation method and its application, in particular to a GaN-ZnO solid solution nanowire, a preparation method and its use in photocatalytic decomposition of water to produce hydrogen, and to construct a photodetector , solar cells and nano-lasers and other optoelectronic devices. Background technique [0002] The design and development of high-performance semiconductor photocatalysts is the key to realize high-efficiency solar photocatalytic water splitting to hydrogen production, thereby solving energy and environmental problems. Nowadays, with the rapid development of nanotechnology, designing and preparing nanostructured semiconductor photocatalysts, taking advantage of the excellent performance of the material size into the nanometer scale, and enhancing the efficiency of its solar photocatalytic water splitting to produc...

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Problems solved by technology

The main reasons are: ① In this method, ZnO, Ga 2 o 3 Requires first reaction to form ZnGa 2 o 4 intermediate, and then nitridated by ammonia gas to form GaN-ZnO solid solution, resulting in the molar ratio of ZnO in the solid solution cannot exceed 33%, which limits the solar spectrum response range of the photocatalyst; Irregular particles on the micron scale have problems such as huge grain size, uneven element distribution, and excessive crystal defects, which are extremely unfavorable for the separation and transmission of photogenerated charges.

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