The photocatalytic applications of the S-doped titanium dioxide (TiO₂) are of great importance due to photon-to-carrier conversion ability of S-doping in the energy region below the band gap of pure TiO₂. Therefore, 1D (one dimensional) S-doped TiO₂ anatase nanorods were synthesized first time by facile, low temperature and template free oxidant peroxide method (OPM). The addition of thiourea as sulfur precursor favored the formation of better crystalline anatase TiO₂ and S atoms favorably crystalized the anatase structure. It was found that substitution of Ti⁴⁺ by S⁶⁺ in the lattice of S doped TiO₂ nanorods increased the number of adsorbed active groups (hydroxyl radical) at the surface of catalyst and also gave rise to the visible-light response. The formation of TiOS bond favors the partial transfer of electrons from S to O atoms. It helps the electron-deficient S atoms to hold/capture electrons and thus reduce the recombination rate of photogenerated electron–hole pairs. The preferred anatase {1 0 1} facets could also act as beneficiary reservoirs to decrease the recombination probability of electron–hole pairs. Methylene blue (MB) was used as target organic molecule for evolution of photocatalytic activity by photocatalytic oxidation reaction under visible-light. The mineralization products of MB were detected using High Performance Liquid Chromatography (HPLC) and GC/MS spectroscopy that gave the pattern of possible degraded fragments from the mineralization of MB. The role of active species in the degradation process was identified with the help of Mott–Schottky measurement, addition of different scavengers and the band structure obtained from the UV–vis diffuse reflectance spectrum. It was found that holes and hydroxyl radicals played major role in the photo-degradation of MB. The fundamental mechanism for enhanced photocatalytic performance of S doped TiO₂ nanorods was discussed in detail and attributed to the S doping and morphology engineering that may improve the electron–hole pair separation efficiency for enhanced photocatalytic performance under visible-light irradiation. This work may provide an insight into the synthesis of S doped TiO₂ photocatalysts that showed good stability after four cycles and have great potential for environmental purification of organic pollutants.

中文翻译：

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通过新型途径制备的S掺杂的1-D TiO ₂纳米棒的光催化活性的见解：作为有希望实现环境飞跃的平台

S掺杂的二氧化钛（TiO ₂）的光催化应用由于在纯TiO ₂的带隙以下的能量区域中S掺杂的光子-载流子转化能力而非常重要。因此，通过简便，低温和无模板的过氧化物氧化剂方法（OPM）首次合成了一维（一维）S掺杂的TiO ₂锐钛矿纳米棒。硫脲作为硫前体的加入有利于形成更好的结晶锐钛矿型TiO _2，并且S原子有利地使锐钛矿结构结晶。发现在掺杂S的TiO _2中晶格中的S ⁶⁺取代了Ti ⁴⁺。纳米棒增加了催化剂表面吸附的活性基团（羟基自由基）的数量，并且还引起了可见光响应。TiOS键的形成有利于电子从S原子到O原子的部分转移。它有助于缺电子的S原子保持/捕获电子，从而降低光生电子-空穴对的复合率。首选的锐钛矿{1 0 1}面还可以作为受益者来降低电子-空穴对的重组概率。亚甲基蓝（MB）被用作目标有机分子，通过可见光下的光催化氧化反应来发展光催化活性。使用高效液相色谱（HPLC）和GC / MS光谱仪检测MB的矿化产物，该色谱图给出了MB矿化可能降解的片段的模式。借助Mott–Schottky测量，添加不同的清除剂以及从UV-vis漫反射光谱获得的能带结构，可以确定活性物质在降解过程中的作用。发现空穴和羟基自由基在MB的光降解中起主要作用。掺杂S的TiO增强光催化性能的基本机理。添加了不同的清除剂，以及从UV-vis漫反射光谱获得的能带结构。发现空穴和羟基自由基在MB的光降解中起主要作用。掺杂S的TiO增强光催化性能的基本机理。添加了不同的清除剂，以及从UV-vis漫反射光谱获得的能带结构。发现空穴和羟基自由基在MB的光降解中起主要作用。掺杂S的TiO增强光催化性能的基本机理。_对2个纳米棒进行了详细讨论，并将其归因于S掺杂和形态工程，可以提高电子-空穴对的分离效率，从而提高可见光照射下的光催化性能。这项工作可以提供对S掺杂的TiO ₂光催化剂的合成的见解，该光催化剂在四个循环后显示出良好的稳定性，并具有在环境中净化有机污染物的巨大潜力。