Open AccessUltrathin Phosphate‐Modulated Co Phthalocyanine/g‐C 3 N 4 Heterojunction Photocatalysts with Single Co–N 4 (II) Sites for Efficient O 2 Activation
Author(s) -
Chu Xiaoyu,
Qu Yang,
Zada Amir,
Bai Linlu,
Li Zhijun,
Yang Fan,
Zhao Lina,
Zhang Guiling,
Sun Xiaojun,
Yang ZhaoDi,
Jing Liqiang
Publication year - 2020
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202001543
Subject(s) - heterojunction , phthalocyanine , phosphate , materials science , chemistry , inorganic chemistry , analytical chemistry (journal) , nanotechnology , optoelectronics , environmental chemistry , organic chemistry
Realization of solar‐driven aerobic organic transformation under atmospheric pressure raises the great challenge for efficiently activating O 2 by tailored photocatalysts. Guided by theoretical calculation, phosphate groups are used to induce the construction of ultrathin Co phthalocyanine/g‐C 3 N 4 heterojunctions (CoPc/P‐CN, ≈4 nm) via strengthened H‐bonding interfacial connection, achieving an unprecedented 14‐time photoactivity improvement for UV–vis aerobic 2,4‐dichlorophenol degradation compared to bulk CN by promoted activation of O 2 . It is validated that more • O 2 − radicals are produced through the improved photoreduction of O 2 by accelerated photoelectron transfer from CN to the ligand of CoPc and then to the abundant single Co–N 4 (II) catalytic sites, as endowed by the matched dimension, intimate interface even at the molecular level, and high CoPc dispersion of resulted heterojunctions. Interestingly, CoPc/P‐CN also exhibits outstanding photoactivities in the aerobic oxidation of aromatic alcohols. This work showcases a feasible route to realize efficient photocatalytic O 2 activation by exploiting the potential of ultrathin metal phthalocyanine (MPc) assemblies with abundant single‐atom sites. More importantly, a universal facile strategy of H‐bonding‐dominating construction of MPc‐involved heterojunctions is successfully established.