• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>ACS Omega >Ordered–Disordered BaZrO3−δ HollowNanosphere/CarbonDot Hybrid Nanocomposite: A New Visible-Light-Driven Efficient CompositePhotocatalyst for Hydrogen Production and Dye Degradation
【2h】

Ordered–Disordered BaZrO3−δ HollowNanosphere/CarbonDot Hybrid Nanocomposite: A New Visible-Light-Driven Efficient CompositePhotocatalyst for Hydrogen Production and Dye Degradation

机译：BaZrO3−δ空心有序无序纳米球/碳点混合纳米复合材料：一种新型的可见光驱动高效复合材料用于制氢和染料降解的光催化剂

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Perovskites form an interesting class of photocatalytic compounds because of their chemical stability and exotic chemistry. Although barium zirconates have been known for a long time, their photocatalytic study in the literature is very limited. Herein, we have studied the effect of structural disorder, oxygen vacancies and carbon dots (CDs) on photocatalytic activity of BaZrO3−δ (BZO) hollow nanospheres. High alkaline conditions during hydrothermal synthesis lead to the formation of disordered states as well as oxygen vacancies in BZO and create midgap states within the band gap of BZO. The midgap states further shift its absorption onset toward visible light and their presence and effects have been proved by ultraviolet–visible diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy, and electron spin resonance analysis. A composite that consists of CDs shows upconversion photoluminescence and charge-carrier transfer properties to enhance the light absorption of a photocatalyst and its activity. The photocatalytic efficiency of the compounds wereexamined by H2 evolution and the degradation of methyleneblue (MB) dye. In this study, loading of 3 wt% CDs on BZO shows thehighest hydrogen evolution efficiency (670 μmol/h/g) with anapparent quantum yield of ∼4% and the highest MB dye degradationefficiency (∼90%) among all synthesized composites. The synergisticeffect of increased visible light absorption along with enhanced photogeneratedcharge-carrier transfer efficiency in the presence of CDs and oxygenvacancies in BZO contributes to the enhanced photocatalytic efficacyof hybrid nanomaterials under visible light irradiation.
机译：钙钛矿由于其化学稳定性和奇异的化学性质而形成一类有趣的光催化化合物。尽管锆酸钡已为人所知，但在文献中对它们的光催化研究却非常有限。在这里，我们研究了结构紊乱，氧空位和碳点（CD）对BaZrO3-δ（BZO）空心纳米球光催化活性的影响。水热合成过程中的高碱性条件导致BZO中形成无序状态以及氧空位，并在BZO的带隙内形成中带隙状态。中间能隙状态使吸收开始进一步向可见光转移，其存在和影响已通过紫外可见漫反射光谱，X射线光电子能谱和电子自旋共振分析得到证明。由CD组成的复合材料显示出上转换的光致发光和电荷载流子转移特性，以增强光催化剂的光吸收及其活性。化合物的光催化效率为通过H2的释放和亚甲基的降解检查蓝色（MB）染料。在这项研究中，BZO上3 wt％CD的装载表明具有最高的析氢效率（670μmol/ h / g）表观量子产率约为4％，MB染料降解最高所有合成的复合材料中的效率（约90％）。协同作用可见光吸收增加以及光生增强的作用在CD和氧气存在下的载流子转移效率BZO中的空位有助于增强光催化功效可见光辐照下混合纳米材料的制备。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号