Photothermal catalysis is the most promising strategy for converting solar energy into thermal or chemical energy to facilitate various reactions. In this study, Mn-based carbon materials for HCHO removal were prepared through carbonization and hydrothermal treatment of Mn-MIL-100. Our findings suggest that the surface temperature of the Mn-based carbon materials reaches approximately 60 °C under light irradiation. Moreover, the materials achieved nearly 100% HCHO removal (4 ppm) within 30 min. The synergistic photothermal effect of MnO2 and graphitic carbon mainly results from electron transfers involving the d-d orbital transition of MnO2, surface-adsorbed oxygen molecules, and lattice oxygen, along with the high thermal and electrical conductivities of the carbon material. The surface redox reactions of oxygen-containing groups and the Mn4+/Mn3+ transition may produce superoxide radicals on the Mn-based carbon materials and are effective for HCHO removal through photodriven thermocatalysis. Our study provides a facile, simple, and fast approach to efficiently utilize inexhaustible solar energy to catalyze the removal of HCHO.

中文翻译：

---

Mn-MIL-100 衍生的光诱导热催化 HCHO 氧化MnO2@carbon


光热催化是将太阳能转化为热能或化学能以促进各种反应的最有前途的策略。在本研究中，通过碳化和水热处理 Mn-MIL-100 制备了用于去除 HCHO 的 Mn 基碳材料。我们的研究结果表明，在光照射下，锰基碳材料的表面温度达到约 60 °C。此外，这些材料在 30 分钟内实现了近 100% 的 HCHO 去除率 （4 ppm）。MnO2 和石墨碳的协同光热效应主要来自涉及 MnO2、表面吸附氧分子和晶格氧的 d-d 轨道转变以及碳材料的高导热率和导电性的电子转移。含氧基团的表面氧化还原反应和 Mn4+/Mn3+ 转变可能在 Mn 基碳材料上产生超氧自由基，并通过光驱动热催化有效去除 HCHO。我们的研究提供了一种简单、简单、快速的方法，可以有效利用取之不尽的太阳能来催化去除 HCHO。