文献类型：期刊文献

英文题名：Self-Luminous Wood Coatings with Carbon Dots/TiO2 Grafted Afterglow SrAl2O4: Eu, Dy Core-Shell Phosphors for Long-Lasting Formaldehyde Removal

作者：Zhang, Longfei[1,2,3] Wang, Ying[1] Peng, Limin[1] Chen, Zhilin[1] Lyu, Shaoyi[1,2,3] Wang, Siqun[4]

第一作者：张龙飞;Zhang, Longfei

机构：[1] Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, China; [2] Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, 210037, China; [3] National Forestry and Grassland Administration Key Laboratory of Plant Fiber Functional Materials, Fuzhou, 350002, China; [4] Center for Renewable Carbon, University of Tennessee, Knoxville, TN, 37996, United States

年份：2023

卷号：15

期号：9

外文期刊名：Polymers

收录：EI(收录号：20232014102867);Scopus(收录号：2-s2.0-85159349774)

语种：英文

外文关键词：Carbon - Formaldehyde - Light sources - Luminescence - Nanostructured materials - Particle size - Particle size analysis - Phosphors - Photocatalytic activity - Shells (structures) - Sol-gel process - Sol-gels

摘要：Long-term relief of indoor volatile pollution has become a competitive issue worldwide in both visible and dark environments. A novel self-luminous wood coating with carbon dots (CDs)/titanium dioxide (TiO2) nanomaterial coated SrAl2O4: Eu2+, Dy3+ (CDs/TiO2@SAO) composite was prepared for the long-term degradation of formaldehyde through a simple sol-gel method. The microstructure, chemical composition, ultraviolet-visible (UV-vis) spectra, and long-lasting fluorescence of the CDs/TiO2@SAO photocatalyst were analyzed to illustrate the mechanism for degrading formaldehyde. The obtained CDs with a particle size of ~2–7 nm have a good graphite structure and presented good absorption in visible light. In addition, owing to the synergistic effect of the CDs/TiO2 nanomaterial coating layer and the long-afterglow luminescence of the SAO phosphor, the CDs/TiO2@SAO composite can absorb a part of the visible light for photocatalytic degradation and store luminous energy efficiently at daytime so as to give out visible luminescence continuously for a few hours in the darkness. Furthermore, the functional wood coatings with CDs/TiO2@SAO composite presented continuous and efficient photocatalytic activity in the presence and absence of light exposure. The current research could provide a new strategy for designing an efficient photocatalyst for degrading formaldehyde pollution in the daytime with a visible light supply and in an indoor dark environment without an external light source. ? 2023 by the authors.