Abstract In the present study, the Ti-EDTA complex was calcined under hypoxic conditions to result in black TiO2-graphite nanocomposite. With the help of various characterization techniques, the TiO2 in the composite was identified to be anatase, and the graphitic carbon was defective. The co-doping of carbon and nitrogen in anatase was established by X-ray photoelectron spectral analysis. EPR measurements of the sample indicated the existence of singly ionized oxygen vacancies and partial reduction of Ti4+ to Ti3+. The composite exhibited an optical bandgap of 1.7 eV. The composite showed a surface area of 140.9 m2/g and degraded nearly 90 % of rhodamine-6 G dye solution under visible light. It was recyclable for this process. The electrostatic attraction between the nanocomposite and eosin yellow dye molecule favored its adsorptive removal from aqueous solutions. The composite also catalyzed the degradation of colorless contaminant, Bisphenol A, under visible light.

中文翻译：

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来自单一来源前驱体的黑色 TiO2-石墨碳纳米复合材料及其在可见光辐射下与有色和无色污染物的相互作用

摘要 在本研究中，Ti-EDTA 复合物在缺氧条件下煅烧，得到黑色 TiO2-石墨纳米复合材料。在各种表征技术的帮助下，复合材料中的 TiO2 被鉴定为锐钛矿，石墨碳有缺陷。通过X射线光电子能谱分析建立了锐钛矿中碳和氮的共掺杂。样品的 EPR 测量表明存在单电离氧空位和 Ti4+ 部分还原为 Ti3+。该复合材料的光学带隙为 1.7 eV。该复合材料的表面积为 140.9 m2/g，在可见光下降解了近 90% 的罗丹明-6 G 染料溶液。在这个过程中它是可回收的。纳米复合材料和曙红黄色染料分子之间的静电吸引力有利于其从水溶液中吸附去除。该复合材料还在可见光下催化了无色污染物双酚 A 的降解。