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首页> 外文期刊>Advanced Sustainable Systems >Rationally Designed CeO2 Nanosheets over Co9S8 Nanoparticles form S‐Scheme Heterojunction for Efficient Hydrogen Production
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Rationally Designed CeO2 Nanosheets over Co9S8 Nanoparticles form S‐Scheme Heterojunction for Efficient Hydrogen Production

机译：合理设计的CeO2纳米片在Co9S8纳米颗粒上形成S型异质结，实现高效制氢

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Abstract Enriching the active sites of catalysts and artificially regulating the directional migration of photogenerated carriers are effective means to improve the catalytic activity of photocatalysts. In this work, CeO2 nanosheets are prepared by calcination at high temperatures, and the S‐scheme heterojunction photocatalyst CeO2@Co9S8 is prepared by coupling the Co9S8 nanoparticles prepared by hydrothermal method on CeO2 nanosheets. The large specific surface area of CeO2 nanosheets provides sufficient loading sites for Co9S8 and Co9S8 nanoparticles can effectively disperse with the help of CeO2 nanosheet structure, which effectively inhibits the agglomeration of nanoparticles. The high photosensitivity of Co9S8 increases the utilization of CeO2@Co9S8 S‐scheme heterojunction to visible light. The construction of S‐scheme heterojunction improves the separation efficiency of photogenerated carriers, prolongs the service life of photogenerated charges, retains the photogenerated electrons and holes with strong reduction and oxidation ability in the catalyst system, and improves the performance of photocatalytic hydrogen production. The hydrogen yield of 15 wt% Co9S8 supported CeO2@Co9S8 can reach 15.7 times CeO2 and 2.5 times Co9S8, and the composite catalyst has good stability. This work provides a new way for adjusting the surface structure and carrier behavior of photocatalysts.
机译：摘要丰富活跃的催化剂和人工调控方向迁移photogenerated运营商有效手段,提高催化活性的催化剂。准备通过高温煅烧,异质结光催化剂和S方案CeO2@Co9S8 Co9S8由耦合纳米粒子由热液方法CeO2 nanosheets。的CeO2 nanosheets提供足够的加载网站Co9S8和Co9S8纳米颗粒有效地分散在CeO2的帮助nanosheet结构,有效地抑制纳米颗粒的聚集。光敏性Co9S8增加利用异质结CeO2@Co9S8年代检测方案可见光。异质结提高了分离效率photogenerated运营商,延长服务photogenerated生活费用,保留了photogenerated与强大的电子和空穴还原和氧化能力的催化剂系统,提高了性能光催化制氢。产量15 wt % Co9S8 CeO2@Co9S8可以支持达到Co9S8 CeO2的15.7倍和2.5倍,复合催化剂具有良好的稳定性。调整表面工作提供了一种新方法结构和催化剂的载体行为。

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