Tungsten bronze Cs0.33WO3 nanorods modified by molybdenum for improved photocatalytic CO2 reduction directly from air

Abstract

Photocatalytic CO 2 reduction is thought to be a promising strategy in mitigating the energy crisis and several other environmental problems. Hence, modifying or developing suitable semiconductors with high efficiency of photocatalytic CO 2 reduction property has become a topic of interest to scientists. In this study, a series of Mo-modified Cs 0.33 WO 3 tungsten bronze were prepared using a "watercontrollable releasing" solvothermal method to produce effective photocatalytic CO 2 reduction performance. Interestingly, Mo atoms replaced W partially within the hexagonal crystal structure, leading to a significant increase in photocatalytic CO 2 reduction activity of Cs 0.33 WO 3 . The 5% Modoped compound displayed the best performance, with the production yield rates of 7.3 OH). More importantly, the as-prepared Mo-doped Cs 0.33 WO 3 series could also induce the photocatalytic reduction of CO 2 directly from the air in the presence of oxygen, which is beneficial for practical applications. The superior photocatalytic performance of Mo-doped Cs 0.33 WO 3 series over the popular reduced WO 3 may be due to the increase in light absorption induced by the localized surface plasmon resonance (LSPR) effect of Mo 5+ , large improved charge separation ability, and the co-effect of Mo and Cs in crystal. This study provides a simple strategy for designing highly efficient photocatalysts in low concentration of CO 2 reduction.

Well-Designed 3D/2D/2D WO3/Bt/g-C3N4 Z-Scheme Heterojunction for Tailoring Photocatalytic CO2 Methanation with 2D-Layered Bentonite-Clay as the Electron Moderator under Visible Light

“…Recently, molybdenum-modified Cs 0.33 WO 3 nanorods have been reported with significantly enhanced photoactivity for CO 2 reduction to CO and CH 3 OH. Stability up to four cycles with continuous CO and CH 3 OH production was observed . In the current work, high stability of the WO 3 /Bt/g-C 3 N 4 composite observed due to the presence of clay minerals with its good dispersion.…”

Controlling metallic Co0 in ZIF-67-derived N-C/Co composite catalysts for efficient photocatalytic CO2 reduction

“…S9, the survey spectra showed the presence of C, N, and Co species for all samples. It is widely recognized that the increased catalytic sites are beneficial to CO 2 activation [4,38,41]. Co contents that were determined from XPS analysis decreased with an increase in the pyrolysis temperature (Fig.…”

“…The increase in global average temperature and sea level can be attributed to the greenhouse effect caused by excessive carbon dioxide (CO 2 ) emissions [1]. Photocatalytic CO 2 reduction has recently drawn much attention because solar energy is a clean, sustainable, and economical energy source [2][3][4]. Photocatalytic CO 2 reduction is attractive because CO 2 molecules can be converted into solar fuels [5][6][7].…”

Effective visible‐light CO2 photoreduction over (metallo)porphyrin‐based metal–organic frameworks to achieve useful hydrocarbons

“…[5] To this end, the chemical photoreduction of CO 2 has become one of the auspicious solutions. [6,7] Previously, various photocatalysts such as semiconductors, zeolites, and metal complexes have been investigated as photocatalysts CO 2 reduction [7][8][9][10][11][12][13] ; because these compounds have potential drawbacks including a large bandgap, and low affinity of CO 2 molecules to the catalyst surface, their efficiency for CO 2 photoreduction is not sufficient. Consequently, the design of a novel system for the development of more ideal photocatalysts in CO 2 reduction with efficient visible-light absorption and effective charge migration to the CO 2 activators is required.…”