Synthesis of Biomass-Supported Nanocomposites from Black Cumin Pulp and their Use as Catalysts in NaBH4 Hydrolysis

Abstract

Co-Cu-Zn-B/black cumin meal(bcm) nanocomposites were synthesized by chemical degradation and deposition method. The structure and morphology of Co-Cu-Zn-B/bcm, which was synthesized at room conditions and active in sodium borohydride hydrolysis, were characterized by SEM, EDS, XRD devices. To prepare the waste black cumin meal as a support material, it was first kept in an autoclave at 180 degrees C in the oven for 6 h. In this stage, binary and ternary Co-Cu-B/bcm, Co-Zn-B/bcm and Co-Cu-Zn-B/bcm samples and different metal ratios (10-60%) NaBH4 hydrolysis experimental results were tested. In terms of production from NaBH4 hydrolysis of the synthesized nanocomposites, it has been observed that the best results are exhibited in those produced with 50% metal ratio and binary metal components Co-Cu-B/bcm, where catalytic activities occur. Co-Cu-B/bcm > Co-Cu-Zn-B/bcm > Co-Zn-B/bcm Maximum energy production rate in terms of catalytic activity and completion time of parts is 1757.1 mL/g.cat at 30 degrees C it was detected as min. The effects of variables such as NaOH and NaBH4 compositions in solution, a certain limit and temperature on NaBH4 hydrolysis were tested separately. The kinetics of the combined products were examined between temperatures (20-50 degrees C) and then the activation energy was calculated as 37.67 kJ/mol. The activation energy and temperature range obtained show that the catalyst has good activity compared to expensive catalysts.