Advanced activation of persulfate by polymeric g-C3N4 based photocatalysts for environmental remediation: A review

JOURNAL OF HAZARDOUS MATERIALS

卷:413

Review

Hasija, Vasudha¹  Nguyen, Van-Huy²  Kumar, Ajay^3,4  Raizada, Pankaj¹  Krishnan, Venkata^3,4  Khan, Aftab Aslam Parwaz^5,6  Singh, Pardeep¹  Lichtfouse, Eric^7,8  Wang, Chuanyi⁹  Huong, Pham Thi^10,11 

[1] Shoolini Univ, Sch Adv Chem Sci, Solan 173229, Himachal Prades, India

[2] Lac Hong Univ, Key Lab Adv Mat Energy & Environm Applicat, Dong Nai 810000, Vietnam

[3] Indian Inst Technol Mandi, Sch Basic Sci, Mandi 175075, Himachal Prades, India

[4] Indian Inst Technol Mandi, Adv Mat Res Ctr, Mandi 175075, Himachal Prades, India

[5] King Abdulaziz Univ, Ctr Excellence Adv Mat Res, POB 80203, Jeddah 21589, Saudi Arabia

[6] King Abdulaziz Univ, Fac Sci, Chem Dept, POB 80203, Jeddah, Saudi Arabia

[7] Aix Marseille Univ, Coll France, CEREGE, INRA,IRD,CNRS, F-13100 Marseille, Aix En Provence, France

[8] Xi An Jiao Tong Univ, Int Res Ctr Renewable Energy, State Key Lab Multiphase Flow Power Engn, Xian, Peoples R China

[9] Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Peoples R China

[10] Duy Tan Univ, Inst Res & Dev, Da Nang 550000, Vietnam

[11] Duy Tan Univ, Fac Environm & Chem Engn, Da Nang 550000, Vietnam

关键词: PMS/PDS photocatalytic activation;    SO4 center dot- generation;    Graphitic carbon nitride;    Photocatalysis;    Heterojunction;    Environmental remediation;   

DOI  :  10.1016/j.jhazmat.2021.125324

来源: Elsevier

【 摘 要 】

Photocatalytic materials for photocatalysis is recently proposed as a promising strategy to address environmental remediation. Metal-free graphitic carbon nitride (g-C3N4), is an emerging photocatalyst in sulfate radical based advanced oxidation processes. The solar-driven electronic excitations in g-C3N4 are capable of peroxo (O-O) bond dissociation in peroxymonosulfate/peroxydisulfate (PMS/PDS) and oxidants to generate reactive free radicals, namely SO4 center dot- and OH center dot in addition to O-2(center dot-) radical. The synergistic mechanism of g-C3N4 mediated PMS/PDS photocatalytic activation, could ensure the generation of OH center dot radicals to overcome the low reductive potential of g-C3N4 and fastens the degradation reaction rate. This article reviews recent work on heterojunction formation (type-II heterojunction and direct Z-scheme) to achieve the bandgap for extended visible light absorption and improved charge carrier separation for efficient photocatalytic efficiency. Focus is placed on the fundamental mechanistic routes followed for PMS/PDS photocatalytic activation over g-C3N4-based photocatalysts. A particular emphasis is given to the factors influencing the PMS/PDS photocatalytic activation mechanism and the contribution of SO4 center dot- and OH center dot radicals that are not thoroughly investigated and require further studies. Concluding perspectives on the challenges and opportunities to design highly efficient persulfate-activated g-C3N4 based photocatalysts toward environmental remediation are also intensively highlighted.

【 授权许可】

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