Carbon dot-boosted catalytic activity of CaO2 by tuning visible light conversion. Issue 14 (7th March 2022)

• Record Type: Journal Article
• Authors: Cai, Tingting; Zheng, Wenjing; Chang, Qing; Li, Ning; Yang, Jinlong; Hu, Shengliang
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 14(2022)
• Page Start: 7792
• Page End: 7799
• Publication Date: 2022-03-07
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2ta00711h
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : We present a novel method for tuning visible light conversion to facilitate the release and activation of in situ -generated H2 O2 by virtue of the integration of CaO2 with biocompatible carbon dots (CaO2 /CDs). Abstract : External auxiliary methods, including UV illumination, Fenton reagent addition and O3 aeration, are broadly used to activate self-generated H2 O2 from CaO2 for toxic chemical removal, wastewater remediation, and even cancer therapy. However, these techniques are commercially unfeasible or bring new contaminants into the environment when used. Herein, we present a novel method of tuning visible light conversion to facilitate the release and activation of H2 O2 by virtue of the integration of CaO2 with biocompatible carbon dots (CaO2 /CDs). This totally green catalyst can be facilely synthesized in solution without heating or extra pressure, and exhibits a 2.1 times higher catalytic activity compared to single CaO2 . The incorporation of CDs not only induces more photogenerated carriers but also tunes their reactions to activate the H2 O2 generated from CaO2, giving rise to a high yield of the superoxide radical instead of the hydroxyl radical during the catalytic process. Thus, the CDs significantly enhance the catalytic performance of the H2 O2 released from CaO2 with the help of light energy.