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首页> 外文期刊>Applied Surface Science >Visible-light-induced Degradation Of Formaldehyde Over Titania Photocatalyst Co-doped With Nitrogen And Nickel
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Visible-light-induced Degradation Of Formaldehyde Over Titania Photocatalyst Co-doped With Nitrogen And Nickel

机译：氮，镍共掺杂二氧化钛光催化剂上可见光诱导的甲醛降解

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摘要

Titanium isopropoxide, ammonium carbonate and nickelous nitrate were used as the sources of titanium, nitrogen, and nickel to prepare titania photocatalyst co-doped with nitrogen and nickel by means of the modified sol-gel method. The photocatalyst was characterized by X-ray diffraction (XRD), UV-vis diffusive reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM). The prepared N-Ni co-doped photocatalyst showed optical absorption in the visible light area and exhibited excellent photocatalytic ability for the degradation of formaldehyde under visible light irradiation. The effects of annealing temperature and component on the phase composition and photocatalytic activity were investigated. The results demonstrated that nitrogen atoms was weaved into the structure of titania and led to the response to visible light. However, nickel atoms existed in the form of Ni_2O_3, dispersed on the surface of TiO_2, suppressed the recombination of photo-induced electron-hole pairs, raised the photo quantum efficiency, and led to the enhancement of photocatalytic performance. The increase of photoactivity was attributed to the synergistic effects of co-doping.
机译：用异丙醇钛，碳酸铵和硝酸亚镍作为钛，氮和镍的来源，通过改进的溶胶-凝胶法制备了与氮和镍共掺杂的二氧化钛光催化剂。通过X射线衍射（XRD），紫外可见漫反射光谱（DRS），X射线光电子光谱（XPS），扫描电子显微镜（SEM）对光催化剂进行了表征。制备的N-Ni共掺杂光催化剂在可见光区域显示出光吸收，并且在可见光照射下表现出优异的降解甲醛的光催化能力。研究了退火温度和组分对相组成和光催化活性的影响。结果表明，氮原子被编织到二氧化钛的结构中，并导致对可见光的响应。然而，镍原子以Ni_2O_3的形式存在，分散在TiO_2的表面，抑制了光致电子-空穴对的复合，提高了光量子效率，并提高了光催化性能。光活性的增加归因于共掺杂的协同作用。

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