scholarly journals Three-dimensional self-attaching perovskite quantum dots/polymer platform for efficient solar-driven CO2 reduction

2021 ◽  
Vol 17 ◽  
pp. 100358
Author(s):  
R. Cheng ◽  
C.-C. Chung ◽  
S. Wang ◽  
B. Cao ◽  
M. Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Three Dimensional ◽  
Co2 Reduction ◽  
Perovskite Quantum Dots

Graphene oxide wrapped CH3NH3PbBr3 perovskite quantum dots hybrid for photoelectrochemical CO2 reduction in organic solvents

2019 ◽  
Vol 465 ◽  
pp. 607-613 ◽  
Author(s):  
Qinglong Wang ◽  
Leiming Tao ◽  
Xingxing Jiang ◽  
Mingkui Wang ◽  
Yan Shen
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Organic Solvents ◽  
Co2 Reduction ◽  
Perovskite Quantum Dots

Cubic-cubic perovskite quantum dots/PbS mixed dimensional materials for highly efficient CO2 reduction

2021 ◽  
Vol 481 ◽  
pp. 228838 ◽  
Author(s):  
Junqi Hu ◽  
Mengmeng Yang ◽  
Xi Ke ◽  
Shuhui Yang ◽  
Kunqiang Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Co2 Reduction ◽  
Highly Efficient ◽  
Perovskite Quantum Dots

scholarly journals Reducing the Photodegradation of Perovskite Quantum Dots to Enhance Photocatalysis in CO2 Reduction

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 61
Author(s):  
Hanleem Lee ◽  
Meeree Kim ◽  
Hyoyoung Lee
Keyword(s):  
Quantum Dots ◽  
Chemical Stability ◽  
Single Photon ◽  
Co2 Reduction ◽  
Critical Factor ◽  
Surface Binding ◽  
Ni Doping ◽  
Co Catalyst ◽  
Perovskite Quantum Dots ◽  
Surface Ligand

Solution-processed perovskite quantum dots (QDs) have been intensively researched as next-generation photocatalysts owing to their outstanding optical properties. Even though the intrinsic physical properties of perovskite QDs have been significantly improved, the chemical stability of these materials remains questionable. Their low long-term chemical stability limits their commercial applicability in photocatalysis. In this study, we investigated the photodegradation mechanisms of perovskite QDs and their hybrids via photoluminescence (PL) by varying the excitation power and the ultraviolet (UV) exposure power. Defects in perovskite QDs and the interface between the perovskite QD and the co-catalyst influence the photo-stability of perovskite QDs. Consequently, we designed a stable perovskite QD film via an in-situ cross-linking reaction with amine-based silane materials. The surface ligand comprising 2,6-bis(N-pyrazolyl)pyridine nickel(II) bromide (Ni(ppy)) and 5-hexynoic acid improved the interface between the Ni co-catalyst and the perovskite QD. Then, ultrathin SiO2 was fabricated using 3-aminopropyltriethoxy silane (APTES) to harness the strong surface binding energy of the amine functional group of APTES with the perovskite QDs. The Ni co-catalyst content was further increased through Ni doping during purification using a short surface ligand (3-butynoic acid). As a result, stable perovskite QDs with rapid charge separation were successfully fabricated. Time-correlated single photon counting (TCSPC) PL study demonstrated that the modified perovskite QD film exhibited slow photodegradation owing to defect passivation and the enhanced interface between the Ni co-catalyst and the perovskite QD. This interface impeded the generation of hot carriers, which are a critical factor in photodegradation. Finally, a stable red perovskite QD was synthesized by applying the same strategy and the mixture between red and green QD/Ni(ppy)/SiO2 displayed an CO2 reduction capacity for CO (0.56 µmol/(g∙h)).

Cs2AgInCl6 Double Perovskite Quantum Dots Decorated with Ag Nanoparticles for Photocatalytic CO2 Reduction

2021 ◽  
Author(s):  
Tangxi Chen ◽  
Min Zhou ◽  
Wen Chen ◽  
Yuyao Zhang ◽  
Siyong Ou ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ag Nanoparticles ◽  
Co2 Reduction ◽  
Lead Toxicity ◽  
Double Perovskite ◽  
Excellent Performance ◽  
Perovskite Quantum Dots ◽  
Halide Perovskite

Halide perovskite quantum dots (HP QDs) have been widely used in the field of photocatalysis due to their excellent performance. However, the issues of lead toxicity and instability prevent their...

Amino-Assisted Anchoring of CsPbBr3 Perovskite Quantum Dots on Porous g-C3 N4 for Enhanced Photocatalytic CO2 Reduction

2018 ◽  
Vol 130 (41) ◽  
pp. 13758-13762 ◽  
Author(s):  
Man Ou ◽  
Wenguang Tu ◽  
Shengming Yin ◽  
Weinan Xing ◽  
Shuyang Wu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Co2 Reduction ◽  
Perovskite Quantum Dots

Amino-Assisted Anchoring of CsPbBr3 Perovskite Quantum Dots on Porous g-C3 N4 for Enhanced Photocatalytic CO2 Reduction

2018 ◽  
Vol 57 (41) ◽  
pp. 13570-13574 ◽  
Author(s):  
Man Ou ◽  
Wenguang Tu ◽  
Shengming Yin ◽  
Weinan Xing ◽  
Shuyang Wu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Co2 Reduction ◽  
Perovskite Quantum Dots
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