文献类型：期刊文献

英文题名：Preparation of functional, compositionally graded metal oxide films via the solution precursor plasma spray process

作者：Yu, Zexin[1]; Liu, Meimei[1]; Moliere, Michel[1]; Liao, Hanlin[1]; Moussa, Hatem[2]; Schneider, Rapha?l[2]; Wang, Weize[3]

机构：[1] ICB, UMR 6303, CNRS, UTBM, Université de Bourgogne Franche-Comté, Belfort, 90010, France; [2] Université de Lorraine, Laboratoire Réactions et Génie des Procédés [LRGP], UMR 7274, CNRS, 1 Rue Grandville, BP 20451, Nancy Cedex, 54001, France; [3] Key Lab of Safety Science of Pressurized System, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2018

卷号：2018-May

起止页码：463

外文期刊名：Proceedings of the International Thermal Spray Conference

收录：EI(收录号：20192907197166)

语种：英文

外文关键词：Cerium oxide - Metals - Wide band gap semiconductors - Citrus fruits - Film preparation - Oxide films - Oxide semiconductors - Copper oxides - MOS devices - II-VI semiconductors - Surface plasmon resonance

摘要：The results accumulated up to now by a number of research works tend to show that a single metal oxide semiconductor (MOS) cannot achieve the multiple objective required to make an efficient photocatalytic system, which includes not only the light response, but also the photochemical stability and the avoidance of the recombination of photogenerated electron/hole pairs. Mixing different MOS is considered a promising strategy as it induces beneficial synergistic effects. In this work, we have developed an original method to prepare. compositionally graded films that are active in photodegradation applications. The selected compositionally graded films are the CuO-ZnO and CeO2-ZnO pairs that were deposited via the Solution Precursor Plasma Spray (SPPS) process. Various composition gradients were achieved using different modes of injection of the precursor solutions, generating distinct "film configurations". We characterized the resultant films by SEM and XRD. We determined the corresponding optical bandgap energies through UV-Vis adsorption spectrometry. Then we evaluated the photocatalytic performances of these CuO-ZnO and CeO2-ZnO films through the photodegradation of aqueous solutions of the Orange II dye. The CeO2-ZnO-M films proved capable of degrading almost entirely the Orange II dye within 2 hours, under UV light. Finally, we discuss the correlation between the various film configurations and their photodegradation efficiency. This exploratory work tackles the relatively novel field represented by the use of compositionally graded oxide films for enhanced photochemical reactivity and stresses the effectiveness and versatility of the SPPS technique for the preparation of a large variety of photocatalytic films. ? 2018 ASM International? All rights reserved.