Enhancing potogenerated electron-hole separation in g-C3N4 via axial coordination with CoTAPc for efficient
Wenjie Chen1, Zhexin Zhu1, Zhiguo Shang1
1National Engineering Lab for Textile Fiber Materials and Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou 310018, China.
Abstract:
In this study, 4-pyridylformyl chloride hydrochloride (INA) functionalized modification of g-C3N4 and axial coordinated with tetramino cobalt phthalocyanine (CoTAPc) to obtain the composite photocatalyst g-C3N4-INA-CoTAPc. The novel photocatalytic system (g-C3N4-INA-CoTAPc/peroxymonosulfate (PMS)) showed higher photocatalytic activity for the degradation of carbamazepine (CBZ) than g-C3N4 and CoTAPc. Compared with g-C3N4 and CoTAPc, the removal rate of CBZ increased by 33.5 % and 26.2 % in 50 min. The results showed that the successful connection of g-C3N4 and CoTAPc through INA effectively broadens the light response range of g-C3N4 and the separation of photogenerated carriers, avoids the stacking of CoTAPc, and promotes the conversion rate of CoIII to CoII. Superoxide (•O2-), singlet oxygen (1O2) and sulfate radical (SO4•-) as the main active species were generated in the g-C3N4-INA-CoTAPc/ PMS system. The photocatalytic activity remained basically unchanged after repeated use for 10 times. The intermediate and final products in the degradation process of CBZ were detected, and the degradation process of CBZ was speculated. This synergistic photocatalytic system provides new insights into the utilization of solar energy and a new perspective for the exploration of photocatalysts for environmental rehabilitation.
More Related Videos
06:34Synthesis of Antiviral Tetrahydrocarbazole Derivatives by Photochemical and Acid-catalyzed C-H Functionalization via Intermediate Peroxides CHIPS
Published on: June 20, 2014
07:12Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
Published on: July 17, 2020
Related Concept Videos
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
Thermal and Photochemical Electrocyclic Reactions: Overview
[3,3] Sigmatropic Rearrangement of 1,5-Dienes: Cope Rearrangement
Aromatic Hydrocarbon Cations: Structural Overview
Removing one hydrogen from the intervening CH2 group...
Thermal Electrocyclic Reactions: Stereochemistry
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Cycloaddition Reactions: MO Requirements for Photochemical Activation
