Titanium dioxide is an n-type semiconductor widely used in applications like catalysts, optoelectonic materials, ceramics, $$\hbox {H}_{{2}}$$ H 2 generation, self-cleaning, water purification and solar cells. Sol–gel method has been chosen for nanoparticle synthesis because of its easy stoichiometry control, cost effectiveness and low temperature synthesis. In this study, titanium dioxide nanoparticles doped with different amounts of manganese (Mn) and nitrogen (N) were synthesized with sol–gel method. Crystal structure of undoped, Mn-doped, and Mn–N-codoped nanoparticles were determined with X-ray diffraction (XRD) analysis. Fourier transform infrared spectroscopy (FTIR) analysis was performed to identify the functional groups of nanoparticles. Photocatalytic analysis was caaried out by methylene blue degredation under UV light for 1 h. X-ray photoelectron spectroscopy (XPS) analysis was conducted to identify the chemical state and composition of the nanoparticles. Compared to the undoped $$\hbox {TiO}_{2}$$ TiO 2 , which had 79.37% efficiency, Mn-doped and Mn–N-codoped $$\hbox {TiO}_{2}$$ TiO 2 nanoparticles have shown greater photocatalytic efficiency with 86.25 and 99.11% efficiencies, respectively. The results confirm that doping of manganese and nitrogen has affirmative effect on phptocatalytic properties of synthesized nanoparticles.

中文翻译：

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锰氮共掺杂对二氧化钛纳米粒子光催化性能的协同作用

二氧化钛是一种 n 型半导体，广泛用于催化剂、光电材料、陶瓷、$$\hbox {H}_{{2}}$$ H 2 代、自清洁、水净化和太阳能电池等应用。溶胶-凝胶法因其易于化学计量控制、成本效益和低温合成而被选择用于纳米颗粒合成。在本研究中，采用溶胶-凝胶法合成了掺杂不同量锰 (Mn) 和氮 (N) 的二氧化钛纳米粒子。通过 X 射线衍射 (XRD) 分析确定未掺杂、Mn 掺杂和 Mn-N 共掺杂纳米粒子的晶体结构。进行傅里叶变换红外光谱 (FTIR) 分析以鉴定纳米颗粒的官能团。紫外光下亚甲蓝降解 1 h 进行光催化分析。进行 X 射线光电子能谱 (XPS) 分析以鉴定纳米颗粒的化学状态和组成。与未掺杂的 $$\hbox {TiO}_{2}$$ TiO 2 相比，效率为 79.37%，Mn 掺杂和 Mn-N 共掺杂 $$\hbox {TiO}_{2}$$ TiO 2纳米颗粒显示出更高的光催化效率，效率分别为 86.25% 和 99.11%。结果证实，锰和氮的掺杂对合成的纳米粒子的phpto催化性能有肯定的影响。分别为 11% 的效率。结果证实，锰和氮的掺杂对合成的纳米粒子的phpto催化性能有肯定的影响。分别为 11% 的效率。结果证实，锰和氮的掺杂对合成的纳米粒子的phpto催化性能有肯定的影响。