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Abstract:
The selective degradation of specific substances in mixed contaminants is quite challenging. And a general approach for sensitized oxide semiconductor relies on dip-coating method with sensitizer. Here, hydrophilic 2D, nest-like architecture ZnO (ZnO NA) was hydrophobicly functioned by monomolecular-layer tetraphenylporphyrin zinc (ZnTPP), where ZnTPP was synthesized by means of an in situ center-substituted (ISCS) process., i.e., the hydrogen atoms in the core of metal-free tetraphenylporphyrin (H2TPP) are substituted by the unsaturated zinc ions in ZnO NAs. ZnTPP/ZnO NA was exhibited with significant hydrophobicity, benefitting to absorb hydrophobic phenol (PL). Further, it is realized to selectively photodegradate PL in the mixture by ZnTPP/ZnO NAs under visible irradiation. Note that the rate of degradation to hydrophobic PL by ZnTPP/ZnO NA is 9.17 times of that for ZnO NA within 150 min; on the contrary, the degradation rate of hydrophilic rhodamine B (RhB) by ZnTPP/ZnO is reduced by 40%. Radiative lifetime of photogenerated charges is obviously increased by ZnTPP/ZnO NA compared with that of ZnTPP, indicating the effective charge separation for ZnTPP/ZnO NAs. In addition, ZnTPP/ZnO NA produced more superoxide radicals (center dot O-2(-)) in comparison to ZnO NA. With surface functionalization, the feasibility of selective photocatalysis under visible irradiation is demonstrated.
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PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
ISSN: 0934-0866
Year: 2019
Issue: 3
Volume: 36
3 . 0 9 9
JCR@2019
2 . 7 0 0
JCR@2023
ESI Discipline: MATERIALS SCIENCE;
ESI HC Threshold:236
JCR Journal Grade:2
CAS Journal Grade:3
Cited Count:
WoS CC Cited Count: 12
SCOPUS Cited Count: 12
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
Affiliated Colleges: