A three-dimensionally ordered porous niobium pentoxide inverse opal photonic crystal (Nb2O5-IO) catalyst was successfully synthesized by a combined strategy of immersion vertical deposition,sol-gel method and template method.The photocatalytic activity of the Nb2O5-IO catalyst was investigated via the photocatalytic degradation of Rhodamine B (RhB),an organic dye.The results revealed that the as-prepared Nb2O5-IO-0.3 catalyst exhibited excellent photocatalytic performance under simulated sunlight irradiation,achieving complete decolorization and degradation of RhB within 100 minutes of light exposure,and its catalytic activity was remarkably superior to that of pure Nb2O5 catalyst.Meanwhile,the catalyst maintained stable catalytic activity after three consecutive photocatalytic degradation cycles,demonstrating favorable cycling stability.Active species trapping experiments verified that hydroxyl radicals (·OH) and photogenerated holes (h+) served as the primary active species during the photocatalytic degradation process,on the basis of which the corresponding photocatalytic degradation mechanism was proposed.
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基金资助
内蒙古自治区自然科学基金资助项目(2023QN02020);内蒙古科技大学基本科研业务费专项资助项目(2023QNJS056和2023QNJS057)
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