C, N co-doped TiO2/TiC0.7N0.3composite coatings prepared fromTiC0.7N0.3powder using ball milling followed by oxidation
C, N co-doped TiO2/TiC0.7N0.3composite coatings prepared fromTiC0.7N0.3powder using ball milling followed by oxidation
复制标题
TiC0.7N0.3粉末球磨氧化制备C、N共掺杂TiO2/TiC0.7N0.3复合涂层
DOI：
10.1016/j.apsusc.2016.06.026
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发表时间：
2017
影响因子：
6.7
通讯作者：
Jizi Liu
中科院分区：
文献类型：
--
作者：
Liang Hao;Zhenwei Wang;Yaoqing Zheng;Qianqian Li;Sujun Guan;Qian Zhao;Lijun Cheng;Yun Lu;Jizi Liu
以TiC0.7N0.3粉末为原料，采用球磨-热氧化的方法在Al_2O_3球表面制备了C、N共掺杂的TiO_2涂层。用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)和紫外可见光谱仪(UV-Vis)对所制备的涂层进行了表征。结果表明，球磨后形成了连续的TiC0.7N0.3涂层。TiC0.7N0.3涂层在大气中直接氧化后，制备了C，N共掺杂的TiO2TiC0.7N0.3复合涂层。而TiC0.7N0.3涂层在碳粉中的热氧化过程中，在深度小于10 nm的表层几乎没有生成TiO2。同时，对这些涂层在紫外光和可见光照射下的光催化活性进行了评价。所有涂层在紫外光和可见光照射下都表现出对亚甲基蓝的光催化降解活性。C，N共掺杂的TiO2TiC0.7N0.3复合涂层表现出最优异的性能。可见光辐射下的增强应归因于碳和氮的共掺杂，增强了可见光的吸收。紫外光照射下光催化活性的提高应归因于C、N共掺杂、金红石-锐钛矿混合相的形成和TiO2TiC0.7N0.3复合微结构的协同作用。
Ball milling followed by heat oxidation was used to prepared C, N co-doped TiO2coatings on the surfacesof Al2O3balls from TiC0.7N0.3powder. The as-prepared coatings were characterized by X-ray diffraction(XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and ultraviolet-visible spectrophotometer (UV–vis). The results show that continuous TiC0.7N0.3coatings were formedafter ball milling. C, N co-doped TiO2/TiC0.7N0.3composite coatings were prepared after the direct oxi-dization of TiC0.7N0.3coatings in the atmosphere. However, TiO2was hardly formed in the surface layerof TiC0.7N0.3coatings within a depth less than 10 nm during the heat oxidation of TiC0.7N0.3coatingsin carbon powder. Meanwhile, the photocatalytic activity evaluation of these coatings was conductedunder the irradiation of UV and visible light. All the coatings showed photocatalytic activity in the degra-dation of MB no matter under the irradiation of UV or visible light. The C, N co-doped TiO2/TiC0.7N0.3composite coatings showed the most excellent performance. The enhancement under visible light irra-diation should attribute to the co-doping of carbon and nitrogen, which enhances the absorption of visiblelight. The improvement of photocatalytic activity under UV irradiation should attribute to the synergisticeffect of C, N co-doping, the formation of rutile-anatase mixed phases and the TiO2/TiC0.7N0.3compositemicrostructure.