文献类型：期刊文献

英文题名：Long-lasting CaAl2O4:Eu2+,Nd3+ phosphor-coupled g-C3N4 QDs composites for the round-the-clock photocatalytic methyl orange degradation

作者：Zhou, Changshun[1,3]; Zhan, Peimin[1]; Zhao, Jun[2]; Tang, Xufang[4]; Liu, Wenlin[5]; Jin, Min[6]; Wang, Xinxing[6]

机构：[1] Yuanpei College, Shaoxing University, Shaoxing, 312000, China; [2] Sichuan College of Architectural Technology, Deyang, 618000, China; [3] Civil Engineering College, Central South University, Changsha, Hunan, China; [4] College of Materials and Chemistry, China Jiliang University, Hangzhou, 310018, China; [5] School of Food Science & Technology, Harbin Institute of Technology, 73 Huang He Avenue, Harbin, Heilongjiang, 150090, China; [6] Department of Physics, Sichuan University, Huanlu Nan No.21, Chengdu, Sichuan, 610041, China

年份：2020

卷号：46

期号：17

起止页码：27884

外文期刊名：Ceramics International

收录：EI(收录号：20203509119720)、Scopus(收录号：2-s2.0-85089976841)

语种：英文

外文关键词：Azo dyes - Excited states - Luminescence - Photocatalytic activity - Citrus fruits - Semiconductor quantum dots - Light sources - Clocks - Phosphors

外文摘要：Long-lasting phosphors are a type of important materials that can release their stored energy in form of light after tuning off the excitation light source. Due to this unique luminescent property, combining a long-lasting phosphor and a suitable photocatalyst can keep the photocatalytic activity in the absence of the excitation light source. Here, a novel round-the-clock photocatalyst, combined the CaAl2O4:Eu2+,Nd3+ (CAOED) blue long-lasting phosphor with the g-C3N4 quantum dots (QDs), is reported for the first time. Our results reveal that when the excitation light is off, the photocatalytic degradation of methyl orange (MO) in the CAOED-coupled g-C3N4 QDs composites can continue for > 3 h, and come back its initial state after several time. Although the light intensity emitted from the CAOED is decreased with the increase of the delay time, the stored energy of the obtained photocatalyst can be recharged and recovered basing on the long-lasting decay curve, exhibiting the round-the-clock behavior. Our discussion reveal that this external irradiation-free photocatalytic activity is due to the long-lasting luminescence of the CAOED caused by the crystal lattice defects and the visible-light utilization and recombination rate of photo-generated carriers in the CAOED-coupled g-C3N4 QDs photocatalyst. ? 2020 Elsevier Ltd and Techna Group S.r.l.