当前位置：
X-MOL 学术
›
ACS Appl. Nano Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Photo-Induced Exciton Dynamics and Broadband Light Harvesting in ZnO Nanorod-Templated Multilayered Two-Dimensional MoS2/MoO3 Photoanodes for Solar Fuel Generation
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-01-22 , DOI: 10.1021/acsanm.9b01972 Keshab Karmakar 1 , Dipanjan Maity 1 , Debashish Pal 2 , Kalyan Mandal 1 , Gobinda Gopal Khan 2
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-01-22 , DOI: 10.1021/acsanm.9b01972 Keshab Karmakar 1 , Dipanjan Maity 1 , Debashish Pal 2 , Kalyan Mandal 1 , Gobinda Gopal Khan 2
Affiliation
|
The architectural design of multidimensional nanoheterostructures-based photoelectrodes is demonstrated by coupling the multilayered two-dimensional (2D) structure of MoS2 and MoO3 on the well-aligned arrays of one-dimensional (1D) ZnO nanorods template, with the expected effective synergic effects. The advantages of catalytically active sites of the 2D layered structure of transition-metal dichalcogenides/oxides is integrated with the distinctive dimensionality-dependent phenomena of 1D structure to achieve enormous surface area for light harvesting and photoelectrochemical reaction, along with the favorable photocarrier dynamics required for water splitting. The ZnO/MoS2 and ZnO/MoO3 nanoheterostructure photoanodes exhibit low onset potential and enhanced broadband light absorption, resulting in high photocurrent densities of 2.04 and 0.67 mA cm–2 at 1.23 V versus reversible hydrogen electrode under AM 1.5 G illumination, which corrospond to 334% and 43% increases in photocurrent, respectively, compared to that of pure ZnO nanorods. The nanoheterostructure photoanodes also exhibit enhanced applied bias photon-to-current conversion efficiency and superior spatial photo-induced exciton separation and transportation, because of the favorable interfacial band alignment at 2D–1D nanoheterointerfaces, and suppress the surface charge recombination, which promotes hole transportation at the nanoheterostructure/electrolyte interface and boost the surface oxygen evolution reaction, leading to enhanced photoelectrochemical performance.
中文翻译：
ZnO纳米棒模板化的多层二维二维MoS 2 / MoO 3光阳极中的光致激子动力学和宽带光收集用于太阳能发电。
通过将一维（1D）ZnO纳米棒模板上排列良好的阵列上的MoS 2和MoO 3的多层二维（2D）结构与预期的有效协同作用相结合，证明了基于多维纳米异质结构的光电极的体系结构设计。效果。过渡金属二卤化物/氧化物的2D层状结构的催化活性位点的优点与1D结构的独特的尺寸依赖性现象相结合，以实现用于光收集和光电化学反应的巨大表面积，以及所需的有利的光载流子动力学水分解。ZnO / MoS 2和ZnO / MoO 3纳米异质结构光阳极表现出低的起始电位和增强的宽带光吸收，从而导致2.04和0.67 mA cm –2的高光电流密度与可逆氢电极在AM 1.5 G下在1.23 V下相比，与纯ZnO纳米棒相比，光电流分别增加了334％和43％。纳米异质结构光阳极还表现出增强的偏置光子-电流转换效率和出色的空间光致激子分离和传输，这是因为在2D–1D纳米异质界面处界面能带对齐，并抑制了表面电荷复合，从而促进了空穴传输在纳米异质结构/电解质界面处，并促进表面氧释放反应，导致增强的光电化学性能。
更新日期：2020-01-23
中文翻译：
ZnO纳米棒模板化的多层二维二维MoS 2 / MoO 3光阳极中的光致激子动力学和宽带光收集用于太阳能发电。
通过将一维（1D）ZnO纳米棒模板上排列良好的阵列上的MoS 2和MoO 3的多层二维（2D）结构与预期的有效协同作用相结合，证明了基于多维纳米异质结构的光电极的体系结构设计。效果。过渡金属二卤化物/氧化物的2D层状结构的催化活性位点的优点与1D结构的独特的尺寸依赖性现象相结合，以实现用于光收集和光电化学反应的巨大表面积，以及所需的有利的光载流子动力学水分解。ZnO / MoS 2和ZnO / MoO 3纳米异质结构光阳极表现出低的起始电位和增强的宽带光吸收，从而导致2.04和0.67 mA cm –2的高光电流密度与可逆氢电极在AM 1.5 G下在1.23 V下相比，与纯ZnO纳米棒相比，光电流分别增加了334％和43％。纳米异质结构光阳极还表现出增强的偏置光子-电流转换效率和出色的空间光致激子分离和传输，这是因为在2D–1D纳米异质界面处界面能带对齐，并抑制了表面电荷复合，从而促进了空穴传输在纳米异质结构/电解质界面处，并促进表面氧释放反应，导致增强的光电化学性能。
京公网安备 11010802027423号