Significant improvement in TiO2 photocatalytic activity through controllable ZrO2 deposition†,RSC Advances

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Significant improvement in TiO2 photocatalytic activity through controllable ZrO2 deposition†
RSC Advances ( IF 3.9 ) Pub Date : 2018-07-18 00:00:00 , DOI: 10.1039/c8ra03423k
Xiaofeng Wang ₁ , Rajankumar L Patel ₁ , Xinhua Liang ₁

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ZrO₂ was deposited on anatase TiO₂ nanoparticles using 5–80 cycles of atomic layer deposition (ALD). The photocatalytic activity of all samples was evaluated based on the degradation of methylene blue (MB) solution under UV light. The TiO₂ sample with 45 cycles of ZrO₂ deposition (45c-Zr/TiO₂, 1.1 wt% ZrO₂) was proved to be the most efficient catalyst with a degradation kinetic constant 10 times larger than that of the pure TiO₂ sample. All samples were characterized using inductively coupled plasma atomic emission spectroscopy (ICP-AES), nitrogen adsorption–desorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectra analysis (UV-DRS), Raman and photoluminescence (PL) techniques. The high photocatalytic activity of 45c-Zr/TiO₂ can be attributed to stronger adsorption in the ultraviolet region and a reduction in the recombination rate of electron/hole pairs.

中文翻译：

通过可控的 ZrO2 沉积显着提高 TiO2 光催化活性†

使用 5-80 个原子层沉积 (ALD) 循环将ZrO ₂沉积在锐钛矿 TiO _{2纳米颗粒上。}基于紫外光下亚甲基蓝 (MB) 溶液的降解评估所有样品的光催化活性。经过45 次 ZrO ₂沉积循环的 TiO _{2样品（45c-Zr/TiO}₂，1.1 wt% ZrO _{2 ）被证明是最有效的催化剂，其降解动力学常数是纯 TiO}₂的 10 倍。样本。所有样品均使用电感耦合等离子体原子发射光谱 (ICP-AES)、氮吸附-脱附、X 射线衍射 (XRD)、透射电子显微镜 (TEM)、紫外-可见漫反射光谱分析 (UV-DRS)、拉曼和光致发光 (PL) 技术。_{45c-Zr/TiO 2}的高光催化活性可归因于在紫外区更强的吸附和电子/空穴对复合率的降低。

更新日期：2018-07-18

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