1. Hohai Univ, Coll Environm, Minist Educ, Key Lab Integrated Regulat & Resource Dev Shallow, Nanjing 210098, Peoples R China
2. Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
3. Hangzhou Dianzi Univ, Coll Elect & Informat, Hangzhou 310018, Peoples R China
折叠
Abstract
The design of the excellent photocatalyst with high catalytic activity and light response characteristics remains a significant challenge for heavy metal reduction. Different from conventional heterostructures, this work focuses on a simple and feasible atomic-hybridized strategy to accelerate reaction kinetic process through constructing an electronic channel. Herein, we present an interesting molecule tailoring method to open C = O double bonds of carbon quantum dots (CQDs) and then anchor it onto ReS2 nanosheets to form an electronic channel via Re-5d and O-2p orbital hybridization, in which photoinduced carrier of surface-reduced CQDs (rCQDs) can freely transfer to ReS2 for hexavalent chromium reduction. Compared to pristine ReS2 nanosheets and CQDs/ReS2, the reduction reaction rate constant over the pseudo-first-order kinetic model is enhanced about 13.1 and 4.3 times, respectively. Our findings provide new inspirations for steering electronic channel by atomic hybridization and accelerating reaction kinetic mechanism simultaneously.
Key words
Photocatalytic/Heavy metal reduction/Heterostructures/Molecule tailoring/Electronic channel
NSTL
Elsevier