Embedding Cs2AgBiBr6 QDs into Ce-UiO-66-H to in situ construct a novel bifunctional material for capturing and photocatalytic reduction of CO2

In Situ Growth of Cs3Bi2Br9 Quantum Dots on Bi-MOF Nanosheets via Cosharing Bismuth Atoms for CO2 Capture and Photocatalytic Reduction

“…Additionally, when the weight ratio of Cs 3 Bi 2 Br 9 /Bi-MOF is low (1:9), a lower CO yield is obtained. However, the excessive weight ratio of Cs 3 Bi 2 Br 9 /Bi-MOF (5:5) presents the lowest activity of CO 2 , which may be caused by the agglomeration of Cs 3 Bi 2 Br 9 QDs . Strikingly, 3CBB/Bi-MOF provides a higher CO 2 conversion rate and 82.6% of the CO selectivity, outperforming the composites reported in CO 2 conversion systems (combination of MOF and inorganic photocatalyst) (Table S2).…”

“…Moreover, the CO 2 adsorption was investigated by a DFT simulation. The optimized geometries of CO 2 on Cs 3 Bi 2 Br 9 , Bi-MOF, 3CBB/Bi-MOF, and Cs 3 Bi 2 Br 9 :Bi-MOF are shown in 22 Apparently, the cosharing of Bi species leads to the higher adsorption of CO 2 and strong interaction between CO 2 and Cs 3 Bi 2 Br 9 /Bi-MOF. The CO 2 adsorption process of the prepared samples was explored using in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS).…”

“…Besides, anchoring CsPbBr 3 QDs onto NH x -rich g-C 3 N 4 nanosheets through N–Br chemical bonding linkage can effectively overcome low charge transport efficiency and chemical instability for photocatalytic reduction of CO 2 to CO under visible (vis)-light irradiation . In consideration of the security, some lead-free halide perovskites have also been specially investigated in the application for CO 2 conversion. , For instance, the double perovskite Cs 2 AgBiBr 6 has been reported as an excellent photocatalyst for CO 2 deoxygenation by embedding it into Ce-UiO-66-H . Moreover, Cs 3 Bi 2 Br 9 was reported to show outstanding performance for the selective conversion of CO 2 to CO by effectively reducing the reaction energy of the rate-limiting step of *CO 2 to *COOH intermediates .…”

“…19 In consideration of the security, some leadfree halide perovskites have also been specially investigated in the application for CO 2 conversion. 20,21 For instance, the double perovskite Cs 2 AgBiBr 6 has been reported as an excellent photocatalyst for CO 2 deoxygenation by embedding it into Ce-UiO-66-H. 22 Moreover, Cs 3 Bi 2 Br 9 was reported to show outstanding performance for the selective conversion of CO 2 to CO by effectively reducing the reaction energy of the rate-limiting step of *CO 2 to *COOH intermediates. 23 In particular, the Cs 3 Bi 2 Br 9 perovskite quantum dot (PQD) was proposed to be an ideal material for CO 2 conversion, which benefited from its intriguing quantum confinement effect, small size effect, and photoelectric efficiency.…”

Photogenerated carrier behavior at a gas–solid interface for CO2 adsorption on Cs2AgBiBr6 nanocrystals

“…4 However, its large exciton binding energy is unfavorable for carrier mobility and transportation, and some heterostructures ( i.e. Cs 2 AgBiBr 6 /Ti 3 C 2 T x , 5 Cs 2 AgBiBr 6 /Ce-UiO-66-H 6 ) have been developed to improve charge separation. Besides this, unsatisfactory chemical stability under aqueous conditions, even some polar solvents, has remarkably limited its further development.…”