材料科学
结晶度
热液循环
光催化
傅里叶变换红外光谱
扫描电子显微镜
高分辨率透射电子显微镜
甲基橙
透射电子显微镜
纳米颗粒
亚甲蓝
吸附
化学工程
水热合成
核化学
纳米技术
化学
复合材料
有机化学
催化作用
工程类
作者
N. F. Andrade Neto,Tainara Barbosa Nunes,M. Li,E. Longo,M. R. D. Bomio,F. V. Motta
标识
DOI:10.1016/j.ceramint.2019.09.151
摘要
In this work, zinc tungstate (ZnWO4) nanoparticles were obtained by microwave-assisted hydrothermal method at 140 °C and 2 atm. The hydrothermal treatment time was varied at 0, 5, 10, 30, 60 and 120 min. The nanoparticles were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscope (TEM), high-resolution transmission electron microscope (HRTEM), X-ray fluorescence (FRX), nitrogen adsorption by Brunauer-Emmett-Teller method (BET), UV–Visible spectroscopy (UV–Vis) and Photoluminescence (PL) properties. The adsorptive and photocatalytic properties were estimated against methylene blue (MB - cationic) and methyl orange (MO - anionic) dyes. The diffractograms show that the larger hydrothermal treatment time, anhigher the powders crystallinity. The BET and SEM analysis indicate that the increase in hydrothermal time does not interfere significantly in nanoparticles size but reduces their porosity. The change in the surface area is consistent with the adsorption tests, where the increase of the hydrothermal treatment time reduces the adsorption against the MB and MO dyes. However, increasing the hydrothermal treatment time provides an increase in photocatalytic activity.
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