Increasing the charge separation and the utilization efficiency of sunlight are essential factors in a photocatalytic process.In this study,we prepared crystalline N-CQDs@W_(18) O_(49) heterostructures,through the in situ growth of W_(18) O_(49) nanocrystals on nitrogen-doped carbon quantum dots(N-CQDs).N-CQDs@W_(18) O_(49) nanocomposites showed high activity in the photodegradation of ciprofloxacin(CIP)and methyl orange(MO).The photodegradation activity of the optimized N-CQDs@W_(18) O_(49)-5 sample was four times higher than that of W_(18) O_(49) under ultraviolet-visible(UV–vis) light irradiation.The photodegradation activity of N-CQDs@W_(18) O_(49)-5 sample was two times higher than that of W_(18) O_(49) under near-infrared(NIR) light irradiation.The enhanced photosensitivity of the nanocomposites was attributed to the promotion of charge separation by N-CQDs and the local surface plasmon resonance(LSPR) effect of W_(18) O_(49) under NIR light irradiation.This work provides a promising approach for designing and manufacturing photocatalysts with full-spectral responsiveness and improved charge separation.
Ju HuangJiawen WangZhengjia HaoChensha LiBinsong WangYang Qu
Dear Editors,The quantitative interpretation of the particle and antiparticle correlation results depends critically on understanding the role of Coulomb interaction of the measured pairs of particles with each other,as well as the Coulomb interaction of the pair with the system of remaining particles[1-7].
The nonlinear refraction of tetrasodium salt of copper tetrasulfophthalocyanine in water was investigated by using Z-scan technique at 532 nm with different input energy and different pulse width. We reported the competition between the excited-state refraction and excited-state-thermal-induced refraction. The sign change of nonlinear refraction induced by thermal effect was observed and analyzed. In addition, we found that the excited-state refraction cannot counteract with excited-state-thermal-induced refraction due to different physical mechanism.
Wang ZhangChunying HeXiangwu XiaoWeina SongYachen GaoZhimin ChenYongli DongYiqun WuQian Wang
