Abstract:Summary
Sand samples from Tampa (T) and Panama (P) City beaches in Florida were used as catalysts for dehydrogenation of NaBH4 in methanol. T and P sand samples were sieved to <250, 250 to 500, and >500 μm sizes, and the smallest fractions resulted in faster hydrogen generation rates (HGR), 565 ± 18 and 482 ± 24 mL H2 (min.g of catalyst)−1, respectively. After various base/acid treatments, HGR values of 705 ± 51 and 690 ± 47 mL H2 (min g of catalyst)−1 for HCl‐treated T and P sand samples were attained, respec… Show more
Herein, the development of phosphorus and boron doped graphitic carbon nitride/zeolite (P and B doped g-C 3 N 4zeolite) catalyst under three-step heating conditions was performed. The rst step is to prepare g-C 3 N 4 synthesis from urea at 500 o C. In the second step, the production of B-doped zeolite-g-C 3 N 4 catalyst by calcination of g-C 3 N 4 and zeolite obtained at a ratio of 1:1 with boric acid at 500 o C. In the third step, the obtained B doped zeolite-g-C 3 N 4 catalyst consists of the preparation of B and P doped g-C 3 N 4 -zeolite catalyst as a result of hydrothermal method with phosphoric acid. Characterization studies of the obtained catalysts were carried out with XRD, SEM-EDX, FTIR and XPS analyzes. These obtained catalysts were used as a metal free catalyst in the production of hydrogen (H 2 -P) by sodium borohydride in methanol(NaBH 4 -MR) for the rst time in the literature. Hydrogen production rate (HGR) value for B and P doped g-C 3 N 4 -zeolite catalysts was 6250 ml min − 1 g − 1 .
Herein, the development of phosphorus and boron doped graphitic carbon nitride/zeolite (P and B doped g-C 3 N 4zeolite) catalyst under three-step heating conditions was performed. The rst step is to prepare g-C 3 N 4 synthesis from urea at 500 o C. In the second step, the production of B-doped zeolite-g-C 3 N 4 catalyst by calcination of g-C 3 N 4 and zeolite obtained at a ratio of 1:1 with boric acid at 500 o C. In the third step, the obtained B doped zeolite-g-C 3 N 4 catalyst consists of the preparation of B and P doped g-C 3 N 4 -zeolite catalyst as a result of hydrothermal method with phosphoric acid. Characterization studies of the obtained catalysts were carried out with XRD, SEM-EDX, FTIR and XPS analyzes. These obtained catalysts were used as a metal free catalyst in the production of hydrogen (H 2 -P) by sodium borohydride in methanol(NaBH 4 -MR) for the rst time in the literature. Hydrogen production rate (HGR) value for B and P doped g-C 3 N 4 -zeolite catalysts was 6250 ml min − 1 g − 1 .
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