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首页> 外文期刊>Applied Surface Science >The preparation of nitrogen-doped TiO_(2-x)N_x photocatalyst coated on hollow glass microbeads
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The preparation of nitrogen-doped TiO_(2-x)N_x photocatalyst coated on hollow glass microbeads

机译：中空玻璃微珠包覆氮掺杂TiO_（2-x）N_x光催化剂的制备

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摘要

In this paper, the effective method for nitrogen-doped TiO_(2-x)N_x photocatalyst coated on hollow glass microbeads is described, which uses titanium tetraisopropoxide [Ti(iso-OC_3H_7)_4] as the raw materials and gaseous ammonia as a heat treatment atmosphere. The effects of heat treatment temperature and time on the photocatalytic activity of TiO_(2-x)N_x/beads are studied. The photocatalyst is characterized by the UV-vis diffuse reflection spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis and scanning electron microscopy (SEM). The results show that when the TiO_(2-x)N_x/beads is heated at 650 ℃ for 5 h, the photocatalytic activity of the TiO_(2-x)N_x/beads is the best. Compared with TiO_2, the photoabsorption wavelength range of nitrogen-doped TiO_(2-x)N_x red shifts of about 60 nm, and the photoabsorption intensity increases as well. The photocatalytic activity of the TiO_(2-x)N_x/beads is higher than that of the TiO_2/ beads under visible light irradiation. The presence of nitrogen neither influences on the transformation of anatase to rutile, nor creates new crystal phases. When the TiO_(2-x)N_x/beads is heated at 650 ℃ for 5 h, the amount of nitrogen-doped is 0.53 wt.% in the TiO_(2-x)N_x. As the density of TiO_(2-x)N_x/beads prepared is lower than 1.0 g/cm~3, it may float on water surface and use broader sunlight spectrum directly.
机译：本文介绍了以四异丙醇钛[Ti（iso-OC_3H_7）_4]为原料，以氨气为热源，在中空玻璃微珠上包覆氮掺杂TiO_（2-x）N_x光催化剂的有效方法。治疗气氛。研究了热处理温度和时间对TiO_（2-x）N_x /珠子光催化活性的影响。该光催化剂的特征在于紫外可见漫反射光谱，X射线光电子能谱（XPS），X射线粉末衍射（XRD），Brunauer-Emmett-Teller（BET）分析和扫描电子显微镜（SEM）。结果表明，将TiO_（2-x）N_x / beads在650℃下加热5h，其光催化活性最佳。与TiO_2相比，掺氮TiO_（2-x）N_x的光吸收波长范围发生了约60nm的红移，光吸收强度也增加。 TiO_（2-x）N_x / beads在可见光照射下的光催化活性高于TiO_2 / beads。氮的存在既不影响锐钛矿向金红石的转化，也不产生新的晶相。当将TiO_（2-x）N_x /珠粒在650℃下加热5h时，TiO_（2-x）N_x中氮的掺杂量为0.53wt。％。由于所制备的TiO_（2-x）N_x /珠子的密度低于1.0 g / cm〜3，它可能会漂浮在水面上并直接使用更广的太阳光谱。

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