摘要
开发高效、稳定光解水催化剂,对于缓解能源危机和环境污染问题具有重要意义。本工作中,通过简易水热策略制备了三维纳米结构的In2O3光催化剂,该光催化剂在三维结构上具有合适的自组装程度。为了研究合适的自组装程度对光催化制氢活性的影响,我们利用该催化剂在可见光和模拟太阳光下进行光催化产氢活性测试。结果发现,In2O3-150(水热温度为150°C样品)的光催化活性最佳,这可能是由于其在三维结构上具有合适的自组装程度,这种合适的自组装程度有利于光在催化剂内部的反射以及气体的溢出。通过光催化循环测试,In2O3-150表现出优异的光催化稳定性。本工作突出了控制In2O3三维纳米结构自组装程度的重要性,并探讨了其在可见光和模拟太阳光下制氢的性能及机理。
Exploring economical and efficient photocatalysts for hydrogen production is of great significance for alleviating the energy and environmental crisis.In this study,3 D In2 O3 nanostructures with appropriate self-assembly degrees were obtained using a facile hydrothermal strategy.To study the significance of 3 D In2 O3 nanostructures with appropriate self-assembly degrees in photocatalytic hydrogen production,the photocatalytic performances of samples were evaluated based on the amount of hydrogen gas release under visible-light irradiation(A>400 nm)and simulated solar light illumination.Interestingly,the 3 D In2 O3-150 nanostructured photocatalyst(hydrothermal temperature was 150℃,denoted as In2 O3-150)exhibited extremely superior photocatalytic hydrogen evolution activity,which may have been caused by their unique structure to improve light reflection and gas evolution.The special structure can enhance light harvesting and induce more carriers to participate in photocatalytic hydrogen production.Despite possessing similar 3 D nanostructures,the In2 O3-180 photocatalyst exhibited poor photocatalytic activity.This may have been caused by the high self-assembly degree,which can hinder light irradiation and isolate a portion of the water.In addition,the 3 D nanostructures could effectively make uniform the carrier migration direction,which is from the interior to the rod end.However,the direction of carrier migration of the In2 O3-110 photocatalyst could transfer in various directions,whereas the In2 O3-130 photocatalyst could transfer to both ends of the rod.This might cause partial migration to counteract each other.The compact cluster rod-like structure of In2 O3-180 might prevent the light from exciting the carrier effectively.Through a photocatalytic recycling test,the 3 D In2 O3-150 nanostructured photocatalyst exhibited outstanding photochemical stability.This work highlights the importance of controlling the self-assembly degree of 3 D In2 O3 nanostructures and explores the performances of 3 D In2 O3 nano
作者
陈锐杰
李娣
方振远
黄元勇
罗必富
施伟东
Ruijie Chen;Di Li;Zhenyuan Fang;Yuanyong Huang;Bifu Luo;Weidong Shi(School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu Province,P.R.China;Institute for Energy Research,Jiangsu University,Zhenjiang 212013,Jiangsu Province,P.R.China.)
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2020年第3期115-122,共8页
Acta Physico-Chimica Sinica
基金
国家自然科学基金(21878129,21522603,21477050)资助项目.
关键词
IN2O3
三维纳米结构
自组装
光催化活性
制氢
In2O3
3D nanostructures
Self-assembly
Photocatalytic activity
Hydrogen production
