Synthesis of ZnGa2O4 Hierarchical Nanostructure by Au Catalysts Induced Thermal Evaporation

Abstract

In this paper, ZnGa2O4 hierarchical nanostructures with comb-like morphology are fabricated by a simple two-step chemical vapor deposition (CVD) method: first, the Ga2O3 nanowires were synthesized and employed as templates for the growth of ZnGa2O4 nanocombs; then, the as-prepared Ga2O3 nanowires were reacted with ZnO vapor to form ZnGa2O4 nanocombs. Before the reaction, the Au nanoparticles were deposited on the surfaces of Ga2O3 nanowires and used as catalysts to control the teeth growth of ZnGa2O4 nanocombs. The as-prepared ZnGa2O4 nanocombs were highly crystallized with cubic spinel structure. From the photoluminescence (PL) spectrum, a broad band emission in the visible light region was observed of as-prepared ZnGa2O4 nanocombs, which make it promising application as an optical material.

Study of high quality spinel zinc gallate nanowires grown using CVD and ALD techniques

“…These CL results are different from those in the Chang and Wu study where they observed a strong emission at 360 nm and a weak emission at 680 nm [6]. However, our results are in good agreement with those of X M Chen et al [11]. Thus, the emission peak at around 450 nm in the ZnGa 2 O 4 spectrum can be attributed to the self-activated centers originating from the octahedral Ga-O group in the normal lattice of ZnGa 2 O 4 .…”

“…Thereafter, Chang and Wu fabricated ZnGa 2 O 4 NWs via a two-step method including chemical vapor deposition (CVD) and metal-organic CVD (MOCVD) techniques [6]. Recently, Chen et al prepared ZnGa 2 O 4 hierarchical nanostructures using a single route process [11]. In spite of these studies, an extensive growth study of ZnGa 2 O 4 NWs using a double route process along with their structural, morphological and optical characterization is still missing.…”

Hydrothermal synthesis of spindle shaped hierarchical ZnGa 2 O 4 architectures and their photocatalytic activity

“…ZnGa 2 O 4 structures have been prepared by a lot of methods, including the hydrothermal method, chemical vapour deposition, thermal evaporation, and so on [16][17][18][19]. Among these methods, hydrothermal method is one of the most promising solution methods.…”

Solution Growth of Screw Dislocation Driven α-GaOOH Nanorod Arrays and Their Conversion to Porous ZnGa2O4 Nanotubes

“…However, a lack of cost-effective and scalable growth of MGa 2 O 4 1D arrays has limited their practical applications. Disordered ensembles of ZnGa 2 O 4 NWs were previously synthesized by high-temperature (∼1000 °C) vapor reactions via the VLS growth using Au nanoparticle catalysts. − Such vapor growth suffers from the high cost and difficulty in compositional control. Another seemingly inconspicuous but practically important drawback is that such high temperatures greatly limit the choice of substrates, because commonly used substrates, such as FTO coated glass, cannot tolerate temperatures higher than 600 °C.…”