Zhou Wenhui, Dong Boxu, Si Ziqi, Xu Yushuai, He Xinhua, Zhan Ziyi, Zhang Yaru, Song Chaoyu, Lv Zhuoqian, Zai Jiantao, Qian Xuefeng
Shaoxing Research Institute of Renewable Energy and Molecular Engineering, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Molecules. 2025 Mar 27;30(7):1481. doi: 10.3390/molecules30071481.
Sulfur hexafluoride (SF), the strongest greenhouse gas, has great challenges in degradation because of its stable structure, posing significant environmental concerns. Photocatalysis offers an environmentally friendly, low-energy solution, but the fluoride deposition on catalysts reduces their activity, thus limiting their large-scale application. To prevent catalyst fluoride poisoning, we report a thin-layer graphitic carbon nitride (CN) material loaded with MoO (CNM) that resists fluoride deposition for long-term SF degradation. By combining molecular structure design and nanostructure regulation, we construct a photocatalyst with enhanced charge carrier mobility and reduced transport distances. We find that the CNM exhibits a high specific surface area, increased contact between reactants and active sites, and efficient electron-hole separation due to the Mo-N bonds, achieving an SF degradation efficiency of 1.73 mmol/g after one day due to the prolonged catalytic durability of the catalyst, which is eight times higher than pristine g-CN (0.21 mmol/g). We demonstrate the potential of CNMs for low-energy, high-efficiency SF degradation, offering a new approach to mitigate the environmental impact of this potent greenhouse gas. We envision that this study will inspire further research into advanced photocatalytic materials for environmental remediation, contributing to global efforts in combating climate change.
六氟化硫（SF₆）作为最强的温室气体，因其结构稳定，在降解方面面临巨大挑战，引发了重大的环境问题。光催化提供了一种环境友好、低能耗的解决方案，但催化剂上的氟化物沉积会降低其活性，从而限制了它们的大规模应用。为防止催化剂氟中毒，我们报道了一种负载MoO₃的薄层石墨相氮化碳（CN）材料（CNM），该材料能抵抗氟化物沉积，实现SF₆的长期降解。通过结合分子结构设计和纳米结构调控，我们构建了一种光催化剂，其具有增强的电荷载流子迁移率和缩短的传输距离。我们发现，CNM具有高比表面积，反应物与活性位点之间的接触增加，并且由于Mo-N键实现了有效的电子-空穴分离，由于催化剂的催化耐久性延长，一天后SF₆的降解效率达到1.73 mmol/g，这比原始g-CN（0.21 mmol/g）高出八倍。我们展示了CNM在低能耗、高效降解SF₆方面的潜力，为减轻这种强效温室气体的环境影响提供了一种新方法。我们设想这项研究将激发对用于环境修复的先进光催化材料的进一步研究，为全球应对气候变化的努力做出贡献。
