Related Experiment Video
Updated: Jun 1, 2025
CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light
Published on: June 12, 2019
Enhancement of photocatalytic CO2 reduction in BiOBr through chirality-induced electron spin polarization regulation
Yong Pu1, Tianyue Wang1, Chang Lin1
1Department of School of Chemical Engineering and Technology, Hainan University, Haikou, China.
Abstract:
Severe photogenerated charge carrier recombination involved in photocatalytic CO2 reduction leads to low photocatalytic efficiency. Here we demonstrate that a chiral hierarchical structure could facilitate charge separation in BiOBr, thus suppressing charge recombination and enhancing photocatalytic performance. Chiral helical flower-like BiOBr nanospheres were prepared via a D/L-sorbitol-assisted hydrothermal process, exhibiting a 1.1-fold increase in photocatalytic CO2 reduction activity compared to the achiral counterparts. This enhancement is attributed to the chiral-induced electron spin polarization regulation, as confirmed by photoluminescence and electrochemical characterizations. This work opens an alternative avenue for the design of high-performance photocatalysts.
Related Concept Videos
01:26Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
01:17Thermal Electrocyclic Reactions: Stereochemistry
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
02:17Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
02:30Chirality in Nature
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
02:36Regioselectivity and Stereochemistry of Hydroboration
Hydroboration proceeds in a concerted fashion with the attack of borane on the π bond, giving a cyclic four-centered transition state. The –BH2 group is bonded to the less substituted carbon and –H to the more substituted carbon. The concerted nature requires the simultaneous addition of –H and –BH2 across the same face of the alkene giving syn...