研究目的
To develop a metal-organic framework (MOF) based photocatalyst for visible-light-driven CO2 reduction to produce syngas with controllable H2/CO ratios.
研究成果
The developed (Co/Ru)n-UiO-67(bpydc) MOF composites enable efficient visible-light-driven photocatalytic CO2 reduction to syngas with tunable H2/CO ratios, achieving high yields (e.g., 13600 μmol/g in 16 h) and significantly outperforming homogeneous systems. This work provides a novel strategy for CO2 recycling and syngas production, with potential applications in sustainable energy and chemical synthesis.
研究不足
The study is limited to specific MOF structures and conditions; scalability and long-term stability in industrial applications may require further optimization. The use of organic solvents and sacrificial agents like TEOA could pose environmental and economic challenges.
1：Experimental Design and Method Selection:
A two-step self-assembly process was used to functionalize a phosphorescent MOF (UiO-67(bpydc)) with Ru-based photosensitizers and single-site Co catalysts. This involved mixed-ligand synthesis and post-synthetic metalation to create composite materials (Co/Ru)n-UiO-67(bpydc) with varying Co/Ru ratios.
2：Sample Selection and Data Sources:
Samples included synthesized MOFs such as UiO-67(bpydc), Rux-UiO-67(bpydc), and (Co/Ru)n-UiO-67(bpydc). Chemicals were commercially available and used without purification.
3：List of Experimental Equipment and Materials:
Equipment included UV-vis spectrophotometer (Lambda 750 UV/VIS/NIR, Perkin Elmer), PXRD diffractometer (SmartLab 9 KW, Rigaku), SEM (Quanta FEG 250, FEI), fluorescence spectrophotometer (F-7000, Hitachi), time-resolved confocal fluorescence microscopy (Microtime 200, PicoQuant), specific surface analyzer (BELSORP-Max, MicrotracBEL), ICP-MS (iCAP RQ), gas chromatograph (GC-2014, Shimadzu), and electrochemical workstation (CHI 760E). Materials included ZrCl4, Ru(bpy)2Cl2, Ru(H2bpydc)(bpy)2, Co(NO3)2·6H2O, DMF, acetic acid, THF, CH3CN, H2O, TEOA, and CO2 gas.
4：Experimental Procedures and Operational Workflow:
Synthesis involved solvothermal reactions at 100°C for 24 h for Rux-UiO-67(bpydc), followed by post-synthetic metalation with Co(NO3)2 in THF. Photocatalytic reactions were performed in CO2-saturated CH3CN/H2O mixtures with TEOA as electron donor, irradiated under a 450 nm LED lamp (100 mW/cm2) at 25°C. Products (H2 and CO) were quantified using gas chromatography.
5：Data Analysis Methods:
Data were analyzed using PXRD for crystallinity, UV-vis for absorption, EDX and ICP-MS for elemental composition, N2 adsorption for surface area and pore size, PL and time-resolved PL for electron transfer efficiency, CV for electrochemical properties, and GC for gas quantification.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
UV-vis spectrophotometer
Lambda 750 UV/VIS/NIR
Perkin Elmer
Used for measuring UV-vis diffuse reflectance spectra of the samples.
-
PXRD diffractometer
SmartLab 9 KW
Rigaku
Used for collecting powder X-ray diffraction data to analyze crystallinity.
-
SEM
Quanta FEG 250
FEI
Used for acquiring energy dispersive X-ray spectroscopy mapping images and SEM images.
-
Fluorescence spectrophotometer
F-7000
Hitachi
Used for conducting photoluminescence spectra.
-
Time-resolved confocal fluorescence microscopy
Microtime 200
PicoQuant
Used for time-resolved PL measurements.
-
Gas chromatograph
GC-2014
Shimadzu
Used for quantifying the amount of CO and H2 generated in photocatalytic reactions.
-
Electrochemical workstation
CHI 760E
CH Instruments
Used for recording cyclic voltammograms.
-
Specific surface analyzer
BELSORP-Max
MicrotracBEL
Used for measuring N2 adsorption-desorption isotherms at 77 K.
-
ICP-MS
iCAP RQ
Germany (likely Thermo Fisher Scientific, but brand not fully specified)
Used for determining Co and Ru content in the samples.
-
LED lamp
450 nm
Not specified
Used as light source for photocatalytic irradiation at 100 mW/cm2.
-
登录查看剩余8件设备及参数对照表
查看全部
