Abstract It was for the first time that the complex compound of gallic acid with titanium (IV) salt was used as a precursor to synthesize titania nanotubes. The study was separated into four main sections; (I) synthesizing the complex of titanium with gallic acid, (II) synthesizing anatase and rutile phases through thermal decomposing of the complex, (III) investigating the possibility to synthesize titania nanotubes from the rutile and anatase phases, and (IV) photocatalytic ability of all the nanoparticles. Different methods were applied to analysis, including X-ray diffraction, 1H NMR, FT-IR spectroscopy, elemental analysis, quantum-chemical modeling, Raman spectroscopy, thermal analysis, photoluminescence, BET analysis (to investigate the specific surface activity, total pore volume), EDX, electron microscopy (SEM), acceleration voltages, electrical conductivity, BJH method (to determine average pore diameter), and UV-Vis spectroscopy. We illustrated the possibility of the synthesis of the titania nanotubes from the anatase phase, while rutile phase was not turned to a tube shape. The photocatalytic ability of the obtained nanoparticles was tested by degrading bromophenol blue, as an organic pollutant, under weak light. TiO2 in the form of nanotubes could reduce the concentration of bromophenol blue to 82%, as well as the rutile phase - to 70%, and finally anatase as nan-spheres to 36%.

中文翻译：

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没食子酸与钛的络合物制备的二氧化钛纳米管（TNTs）；检查所得 TNT 的光催化降解

摘要 首次以没食子酸与钛(IV)盐的络合物为前驱体合成二氧化钛纳米管。该研究分为四个主要部分；(I) 合成钛与没食子酸的络合物，(II) 通过络合物的热分解合成锐钛矿和金红石相，(III) 研究从金红石和锐钛矿相合成二氧化钛纳米管的可能性，以及 (IV) 光催化能力所有的纳米粒子。采用不同的方法进行分析，包括 X 射线衍射、1H NMR、FT-IR 光谱、元素分析、量子化学建模、拉曼光谱、热分析、光致发光、BET 分析（研究比表面活性、总孔体积)、EDX、电子显微镜 (SEM)、加速电压、电导率、BJH 法（确定平均孔径）和紫外-可见光谱法。我们说明了从锐钛矿相合成二氧化钛纳米管的可能性，而金红石相没有变成管状。通过在弱光下降解作为有机污染物的溴酚蓝来测试所得纳米颗粒的光催化能力。纳米管形式的二氧化钛可以将溴酚蓝的浓度降低到 82%，金红石相的浓度降低到 70%，最后作为纳米球的锐钛矿浓度降低到 36%。通过在弱光下降解作为有机污染物的溴酚蓝来测试所得纳米颗粒的光催化能力。纳米管形式的二氧化钛可以将溴酚蓝的浓度降低到 82%，金红石相的浓度降低到 70%，最后作为纳米球的锐钛矿浓度降低到 36%。通过在弱光下降解作为有机污染物的溴酚蓝来测试所得纳米颗粒的光催化能力。纳米管形式的二氧化钛可以将溴酚蓝的浓度降低到 82%，金红石相的浓度降低到 70%，最后作为纳米球的锐钛矿浓度降低到 36%。