Solvothermal Synthesis of FDU-12 Derived Ni-Phyllosilicate Using Double Solvent of H2O and n-Pentane

• Published in: Catalysis letters Vol. 152; no. 5; pp. 1488 - 1494
• Main Authors: Chen, Yaqi, Dong, Hao, Zhang, Tengfei, Liu, Qing
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.05.2022; Springer Nature B.V
• Subjects: Aqueous solutions; Carbon dioxide; Catalysis; Catalysts; Channels; Chemistry; Chemistry and Materials Science; Hydrophobicity; Hydroxyl groups; Industrial Chemistry/Chemical Engineering; Laboratories; Moisture content; Morphology; Nanocrystals; Nickel; Nitrates; Organometallic Chemistry; Particle size; Physical Chemistry; Selectivity; Silicon dioxide; Sintering; Sintering (powder metallurgy); Solvents; Double solvent; Urea; Ni-phyllosilicate; Solvothermal synthesis; FDU-12
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1007/s10562-021-03748-9

In order to inhibit the serious damage of pore structure of silica template during the conventional hydrothermal method to prepare Ni-phyllosilicate material, a solvothermal method using double solvent, a small amount of water and a large amount of hydrophobic n -pentane, was proposed to synthesize FDU-12 derived Ni-phyllosilicate in this work. Water can infiltrate the inside channels of FDU-12 owing to more hydrophilic silica hydroxyl groups, and the hydrophobic n -pentane tends to surround the outside of FDU-12. The growth of Ni-phyllosilicate occured only inside channels rather than surface, and the addition of urea could improve its formation at 180 °C in 12 h. As a result, the optimal catalyst retained the pore structure of FDU-12 and obtained fine Ni particle size of 1.5 nm after 750 °C reduction in H 2 flow, which exhibited CO 2 conversion of 77.0% and CH 4 selectivity of 94.7% at 450 °C, 60 L·g −1 ·h −1 . In addition, this catalyst showed high long-term stability in a 100 h-lifetime test with high anti-sintering property derived from Ni-phyllosilicate. Graphic Abstract