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首页> 外文期刊>Advanced Sustainable Systems >Noble Metal‐Free Heterojunction of Ultrathin Ti3C2 MXene/WO3 for Boosted Visible‐Light‐Driven Photoreactivity
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Noble Metal‐Free Heterojunction of Ultrathin Ti3C2 MXene/WO3 for Boosted Visible‐Light‐Driven Photoreactivity

机译：超薄Ti3C2 MXene/WO3的无贵金属异质结增强可见光驱动的光反应性

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Abstract Developing highly efficient, robust, and noble metal‐free photocatalytic systems is essential for the large‐scale implementation of solar‐to‐chemical energy conversion. Herein, a novel sandwich‐like hierarchical heterostructure of Ti3C2 MXene/WO3 is created by in situ growth of ultrathin WO3 nanosheets onto the surface of few‐layer Ti3C2 nanosheets via a one‐pot solvothermal synthesis strategy. The resultant Ti3C2/WO3 heterostructure holds a large interface contact area, an intimate electronic interaction, and a short carrier migration distance, which is beneficial for bulk‐to‐surface and interfacial charge transfer. Meanwhile, the excellent electrical conductivity of Ti3C2 and the Schottky junction at the interface of WO3 and Ti3C2 expedites the spatial charge separation and transportation. As expected, the as‐prepared Ti3C2/WO3 nanohybrids exhibit a superior visible‐light‐driven photoactivity and stability toward tetracycline hydrochloride (TC) decomposition. Across a range of Ti3C2 concentrations, 3 wt% Ti3C2/WO3 achieves the greatest photodegradation rate of 16.08 × 10−3 min−1 that is approximately ninefold larger than that of pristine WO3. In addition to the underlying photocatalytic mechanism, three TC degradation pathways are identified, highlighting the important roles of ·O2− and h+. This study shows the potential of earth‐abundant MXene family materials in the fabrication of high‐performance and low‐cost photocatalysts applicable for environment purification.
机译：抽象发展高效、健壮的和贵金属免费光催化系统对于大型规模的实现太阳能~化学能转换。小说三明治类分级异质结构的Ti3C2 MXene / WO3是由原位生长超薄的WO3 nanosheets到表面上solvothermal合成策略。Ti3C2 / WO3异质结构拥有一个大型的接口接触面积、亲密的电子相互作用,和一个简短的载体迁移距离,这是有利于批量事故的表面和界面电荷转移。Ti3C2导电性和肖特基结界面的WO3和Ti3C2加快了空间电荷分离和交通工具。可见的光量驱动的感光和稳定对盐酸四环素(TC)分解。的浓度,3 wt % Ti3C2 / WO3达到最大的光降解率为16.08×10−3约九倍大于最小−1原始的WO3。底层光催化机制、3 TC降解途径被识别出来,突出显示的重要角色·O2−和h +。显示地球丰富的MXene应承担的潜力家庭的材料制造的高绩效和低成本催化剂适用于净化环境。

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