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Wilasinee Kongsuebchart Joongjai Panpranot Chairit Satayaprasert Piyasan Praserthdam 《Reaction Kinetics and Catalysis Letters》2007,91(1):119-126
Nanocrystalline TiO2 powders with average crystallite sizes of 9–15 nm were synthesized by the solvothermal method and employed as supports for
Co catalysts. The value of H2 chemisorption/specific surface area of Co/TiO2 increased significantly with increasing TiO2 crystallite size. It was suggested that the higher amount of Ti3+ surface defects on the larger crystalline TiO2 resulted in a stronger interaction between Co and TiO2, hence, higher dispersion of Co was obtained. 相似文献
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Aree Choodum Nareumon Lamthornkit Chanita Boonkanon Tarawee Taweekarn Kharittha Phatthanawiwat Wilasinee Sriprom Wadcharawadee Limsakul Laemthong Chuenchom Worawit Wongniramaikul 《Molecules (Basel, Switzerland)》2021,26(20)
Benzo(a)pyrene (BaP) has been recognized as a marker for the detection of carcinogenic polycyclic aromatic hydrocarbons. In this work, a novel monolithic solid-phase extraction (SPE) sorbent based on graphene oxide nanoparticles (GO) in starch-based cryogel composite (GO-Cry) was successfully prepared for BaP analysis. Rice flour and tapioca starch (gel precursors) were gelatinized in limewater (cross-linker) under alkaline conditions before addition of GO (filler) that can increase the ability to extract BaP up to 2.6-fold. BaP analysis had a linear range of 10 to 1000 µgL−1 with good linearity (R2 = 0.9971) and high sensitivity (4.1 ± 0.1 a.u./(µgL−1)). The limit of detection and limit of quantification were 4.21 ± 0.06 and 14.04 ± 0.19 µgL−1, respectively, with excellent precision (0.17 to 2.45%RSD). The accuracy in terms of recovery from spiked samples was in the range of 84 to 110% with no significant difference to a C18 cartridge. GO-Cry can be reproducibly prepared with 2.8%RSD from 4 lots and can be reused at least 10 times, which not only helps reduce the analysis costs (~0.41USD per analysis), but also reduces the resultant waste to the environment. 相似文献
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