摘要 : The photoluminescence (PL) characteristics of ZnO/SiO2 composite particles were investigated. ZnO/SiO2 composite particles were synthesized utilizing the consecutive sol-gel spray drying method by incorpo-rating sodium lauryl sulf... 展开 The photoluminescence (PL) characteristics of ZnO/SiO2 composite particles were investigated. ZnO/SiO2 composite particles were synthesized utilizing the consecutive sol-gel spray drying method by incorpo-rating sodium lauryl sulfate (SLS) as a particle morphology control agent. The effect of SLS concentration and ZnO ratio on precursors was studied further on the composite particle morphology and PL perfor-mance. Elevating the SLS concentration exhibited a reduction in the particle diameter and an increase in particle uniformity. The particle diameter without SLS was 6.18 lm and reduced to 2.6 lm with the addition of SLS at 3 critical micelle concentrations (CMC). The decrease in ZnO concentration also reduced the particle diameter of the ZnO/SiO2 composite to 1.74 lm at a ZnO concentration of 25% mol. In addi-tion, the increase in the excitation wavelength from 230 nm to 320 nm indicates a shift in the peak emis-sion intensity at higher wavelengths from 467 nm to 645 nm. The excitation wavelength-dependent photoluminescence phenomenon was exhibited by incorporating silica into the ZnO precursor pre-and post-drying to deliver composite particles. The addition of silica to the composite particles can augment the PL emission intensity without causing a shift in the PL emission peaks when excited at the same wavelength. The 25% mol ZnO composite particles with the addition of SLS 3 CMC had the highest PL emission intensity. The amount of silica nanoparticles sufficient to trap the ZnO nanoparticles in the dro-plet is an important factor besides the size and uniformity of the particles, which causes the high inten-sity of PL emission. & COPY; 2023 The Society of Powder Technology Japan. Published by Elsevier BV and The Society of Powder Technology Japan. All rights reserved. 收起