A template-free CVD route to synthesize hierarchical porous ZnO films

Gao

Physica Status Solidi (a)

et al. 2017

Zinc Oxide (ZnO) hierarchical microstructures with diverse morphologies were prepared through a simple one-step hydrothermal method with zinc chloride and sodium hydroxide as source materials, and citric acid as the modifying agent. The structure and morphology of the samples were studied through X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, and Brunauer-Emmett-Teller specific surface area determination. The morphology of the samples was easily regulated by changing the concentration of citric acid. Branchy structures, porous flowers, porous microspheres, solid flowers, solid flower spheres, and solid spheres of ZnO were obtained. The porous structures obtained with 150-200 mmol Á L À1 citric acid showed excellent photocatalytic activities for the degradation of methylene blue under UV irradiation. A possible regulation mechanism of citric acid in ZnO crystals was proposed based on the experimental results.

Section: Introductionmentioning

confidence: 99%

Morphology regulation, structural, and photocatalytic properties of ZnO hierarchical microstructures synthesized by a simple hydrothermal method

Gao

Physica Status Solidi (a)

et al. 2017

“…Chemical vapor deposition (CVD) [183,184] is a method of forming a thin film by chemical reaction to one or more vapor phase elements or compounds on the surface of a substrate. CVD can be used to deposit metals, carbides, nitrides, oxides, borides, and the like.…”

Section: Chemical Vapor Deposition (Cvd)mentioning

confidence: 99%

Recent Advances and Applications of Semiconductor Photocatalytic Technology

et al. 2019

Along with the development of industry and the improvement of people’s living standards, peoples’ demand on resources has greatly increased, causing energy crises and environmental pollution. In recent years, photocatalytic technology has shown great potential as a low-cost, environmentally-friendly, and sustainable technology, and it has become a hot research topic. However, current photocatalytic technology cannot meet industrial requirements. The biggest challenge in the industrialization of photocatalyst technology is the development of an ideal photocatalyst, which should possess four features, including a high photocatalytic efficiency, a large specific surface area, a full utilization of sunlight, and recyclability. In this review, starting from the photocatalytic reaction mechanism and the preparation of the photocatalyst, we review the classification of current photocatalysts and the methods for improving photocatalytic performance; we also further discuss the potential industrial usage of photocatalytic technology. This review also aims to provide basic and comprehensive information on the industrialization of photocatalysis technology.

“…Although many of the research efforts are still concentrate in the preparation of 1D ZnO without concening the growth direction, it has been realized that the construction of nanostructures in a wellordered alignment and morphology, is critical for scientific and technological applications. Until now, many technologies have been utilized in ZnO synthesis and fabrication, such as chemical vapor deposition (CVD) (Duan et al, 2015), spray pyrolisis (Shinde, Bhosale, & Rajpure, 2013), wet chemical (Vanalakar et al, 2015), and laser deposition method (Hong, Bae, Wang, & Snyder, 2009). Among them, wet chemistry route has proven to be one of the most efficient method due to its convinience and low cost process.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Structural and Optical Properties of ZnO Film Prepared by Simple Wet Chemical Method

Sholehah

Mulyadi

Haryono

et al. 2018

IJPS

Abstract. ZnO thin layer has a broad potential application in electronic and optoelectronic devices. In this study, vertically align ZnO layers were deposited on ITO glass using wet chemistry method. The seed layers were prepared using electrodeposition technique at 3°C. The growing process was carried out using chemical bath deposition at 90°C. To improve the structural properties, two different hydrothermal treatment variations were applied separately. From the experiment, it is shown that the hydrothermal process using N2 gas has given better results, compared to the conventional treatment.