Thiourea-assisted one-step fabrication of a novel nitrogen and sulfur co-doped biochar from nanocellulose as metal-free catalyst for efficient activation of peroxymonosulfate

Yan Xu, Shuan Liu, Min Wang, Jian Zhang, Haojie Ding, Yunqian Song, Ying Zhu, Qixin Pan, Chun Zhao, Huiping Deng