期刊
DALTON TRANSACTIONS
卷 50, 期 9, 页码 3186-3192出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1dt00128k
关键词
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资金
- Natural Science Foundation of Shandong Province [ZR2018LB019]
- National Natural Science Foundation of China [21978158]
By synthesizing TPVT-MOFs@g-C3N4 composite materials and conducting experiments under visible light, it is possible to increase the efficiency of CO2 reduction and promote the adsorption and reduction of H2O.
The tridentate ligand 2,4,6-tris(2-(pyridin-4-yl)vinyl)-1,3,5-triazine (TPVT) was designed and synthesized. We prepared metal-organic framework (TPVT-MOFs) crystals containing TPVT, 1,3,5-benzenetricarboxylic acid and cobalt by solvothermal reaction. Then, a series of composite materials with different contents of TPVT-MOFs were obtained by combining TPVT-MOFs with g-C3N4. Due to the interaction between TPVT-MOFs and g-C3N4, the composite materials have a more favorable valence band (VB) and conduction band (CB) for photocatalytic reduction of CO2 and oxidation of H2O. Under the conditions of visible light and a gas-solid system without a co-catalyst, a photosensitizer and a sacrificial agent, the yield of CO2 reduction by TPVT-MOFs@g-C3N4-10 can reach 56.4 mu mol center dot g(-1)center dot h(-1), which is 3.2 times that of pure g-C3N4 (17.5 mu mol center dot g(-1)center dot h(-1)). The results of DFT calculations showed that the adsorption of H2O on the TPVT-MOFs@g-C3N4 composite material was more preferential, which promoted the adsorption and reduction of CO2.
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