材料科学
单斜晶系
拉曼光谱
纳米颗粒
化学工程
X射线光电子能谱
立方氧化锆
介孔材料
四方晶系
结块
相(物质)
聚乙烯醇
透射电子显微镜
溶胶凝胶
Crystal(编程语言)
纳米技术
晶体结构
结晶学
有机化学
化学
复合材料
陶瓷
工程类
催化作用
物理
光学
程序设计语言
计算机科学
作者
Ali Bumajdad,Ahmed Abdel Nazeer,Fakhreia Al‐Sagheer,Shamsun Nahar,Mohamed I. Zaki
标识
DOI:10.1038/s41598-018-22088-0
摘要
In this investigation, well defined mesoporous zirconia nanoparticles (ZrO2 NPs) with cubic, tetragonal or monoclinic pure phase were synthesized via thermal recovery (in air) from chitosan (CS)- or polyvinyl alcohol (PVA)-ZrOx hybrid films, prepared using sol-gel processing. This facile preparative method was found to lead to an almost quantitative recovery of the ZrOx content of the film in the form of ZrO2 NPs. Impacts of the thermal recovery temperature (450, 800 and 1100 °C) and polymer type (natural bio-waste CS or synthetic PVA) used in fabricating the organic/inorganic hybrid films on bulk and surface characteristics of the recovered NPs were probed by means of X-ray diffractometry and photoelectron spectroscopy, FT-IR and Laser Raman spectroscopy, transmission electron and atomic force microscopy, and N2 sorptiometry. Results obtained showed that the method applied facilates control over the size (6-30 nm) and shape (from loose cubes to agglomerates) of the recovered NPs and, hence, the bulk crystalline phase composition and the surface area (144-52 m2/g) and mesopore size (23-10 nm) and volume (0.31-0.11 cm3/g) of the resulting zirconias.
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