Photothermal Nanoconfinement Reactor: Boosting Chemical Reactivity with Locally High Temperature in a Confined Space.

Han-Chao Zhang, Zhan-Xiao Kang, Jiang-Jin Han, Peng Wang, Jin-Tu Fan, Guo-Ping Sheng

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Herein, a photothermal nanoconfinement reactor (PNCR) system is proposed and demonstrated by using hollow carbon nanospheres (HCN) to enhance the performance of chemical reaction. Under light irradiation, the local temperature of HCN inner void space was much higher than the bulk solution temperature because the confined space concentrates heat and inhibits heat loss. Using a temperature sensitive model reaction, peroxydisulfate (PDS) activation to oxidize micropollutant, it is shown that the degradation rate of sulfamethoxazole in the PNCR system was 7.1 times of those without nanoconfinement. It is further discovered that the high-quality local heat inside the nanoconfined space shifted the model reaction from an otherwise non-radical pathway to a radical-based pathway in the presence of the confinement. This work provides an interesting strategy to produce locally high temperature which has a wide range of applications to energy and environmental fields.
Original languageEnglish (US)
JournalAngewandte Chemie (International ed. in English)
DOIs
StatePublished - Mar 21 2022

Bibliographical note

KAUST Repository Item: Exported on 2022-03-24
Acknowledgements: The authors wish to thank the National Natural Science Foundation of China (51825804, 51821006), the Fundamental Research Funds for the Central Universities (WK2400000001) for the partial support of this study, and the startup fund at The Hong Kong Polytechnic University.

ASJC Scopus subject areas

  • General Chemistry
  • Catalysis

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