A Novel Poly(vinyl alcohol) Post-precipitation Template Synthesis and Property Tuning of Photoactive Mesoporous Nano-TiO2

IF 1.4 Q3 CHEMISTRY, MULTIDISCIPLINARY

Physical Chemistry Research Pub Date : 2020-06-01 DOI:10.22036/PCR.2020.210668.1704

A. Hamisu, U. Gaya, A. Abdullah

引用次数: 2

Abstract

For the first time, a facile method is introduced to obtain ultrathin, mesoporous TiO2 nanosheets by the alkali precipitation of aqueous TiCl3 in the presence of NH4OH, and in-situ templating with polyvinyl alcohol (PVA). The synthesized titania have been characterized by N2 adsorption-desorption measurements, x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermo-gravimetric analysis (TGA) and ultraviolet-visible (UV-vis) spectroscopy. The obtained titania were hexagonal-like, detached, non-agglomerated, polydispersed, sub-20 nm nanodiscs. Unlike in doping methods, their surface area and pore volumes of can easily be tailored devoid of any wavelength shift, by simply tuning the amount of the template. Accordingly, their aggregation as microspheres can successfully be controlled by the templating step. The remarkable photoactivity of these nanoscopic materials has been confirmed by the degradation of aqueous methyl orange.

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新型聚乙烯醇沉淀后模板合成及光活性介孔纳米tio2性能调整

本文首次介绍了一种简单的方法，即在NH4OH存在下，将TiCl3水溶液碱沉淀，然后用聚乙烯醇(PVA)原位模板制备超薄介孔TiO2纳米片。通过氮气吸附-脱附、x射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、热重分析(TGA)和紫外-可见光谱(UV-vis)对合成的二氧化钛进行了表征。所制得的二氧化钛呈六角形、离体、非团聚、多分散、亚20 nm纳米片状。与掺杂方法不同的是，通过简单地调整模板的量，可以很容易地在没有任何波长移动的情况下定制它们的表面积和孔体积。因此，通过模板步骤可以成功地控制它们作为微球的聚集。这些纳米材料具有显著的光活性，并通过降解甲基橙得到了证实。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical Chemistry Research CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

2.70

自引率

8.30%

发文量

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