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首页> 外文期刊>RSC Advances >Z-scheme 2D-m-BiVO4 networks decorated by a g-CN nanosheet heterostructured photocatalyst with an excellent response to visible light
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Z-scheme 2D-m-BiVO4 networks decorated by a g-CN nanosheet heterostructured photocatalyst with an excellent response to visible light

机译：Z-Scheme 2D-M-BIVO4网络由G-CN纳米蛋白酶异质结构的光催化剂装饰，具有出色的可见光的反应

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For economical water splitting and degradation of toxic organic dyes, the development of inexpensive, efficient, and stable photocatalysts capable of harvesting visible light is essential. In this study, we designed a model system by grafting graphitic carbon nitride (g-C _(3) N _(4) ) (g-CN) nanosheets on the surface of 2D monoclinic bismuth vanadate (m-BiVO _(4) ) nanoplates by a simple hydrothermal method. This as-synthesized photocatalyst has well-dispersed g-CN nanosheets on the surface of the nanoplates of m-BiVO _(4) , thus forming a heterojunction with a high specific surface area. The degradation rate for bromophenol blue (BPB) shown by BiVO _(4) /g-CN is 96% and that for methylene blue (MB) is 98% within 1 h and 25 min, respectively. The 2D BiVO _(4) /g-CN heterostructure system also shows outstanding durability and retains up to ～95% degradation efficiency for the MB dye even after eight consecutive cycles; the degradation efficiency for BPB does not change too much after eight consecutive cycles as well. The enhanced photocatalytic activities of BiVO _(4) /g-CN are attributed to the larger surface area, larger number of surface active sites, fast charge transfer and improved separation of photogenerated charge carriers. We proposed a mechanism for the improved photocatalytic performance of the Z -scheme photocatalytic system. The present work gives a good example for the development of a novel Z -scheme heterojunction with good stability and high photocatalytic activity for toxic organic dye degradation and water splitting applications.
机译：对于有毒有机染料的经济分裂和降解，能够收获可见光的廉价，高效和稳定的光催化剂的开发是必不可少的。在这项研究中，我们设计了通过在2D单斜型钒酸盐（M-BiVo _（4））纳米层的表面上的石墨碳氮化物（GC _（3）N _（4））（G-CN）纳米液（G-CN）纳米液（M-Bivo _（4））纳米板的表面设计通过简单的水热法。该作为合成的光催化剂在M-BIVO_（4）的纳米板的表面上具有良好分散的G-CN纳米片，从而形成具有高比表面积的异质结。通过BIVO_（4）/ G-CN表示的溴苯酚蓝（BPB）的降解速率为96％，亚甲基蓝（MB）在1小时和25分钟内为98％。 2D BIVO _（4）/ G-CN异质结构系统还显示出突出的耐久性，即使连续八个循环后，即使在八个连续循环之后，也能为MB染料保持高达约95％的降解效率; BPB的劣化效率也不会在连续八个周期后变化过多。 BIVO_（4）/ G-CN的增强的光催化活性归因于较大的表面积，大量的表面活性位点，快速电荷转移和改进的光发生电荷载体的分离。我们提出了一种改善Z-Scheme光催化系统的光催化性能的机制。目前的作品为开发一种具有良好稳定性和高光催化活性的新型Z-Scheme异质结，可用于有毒有机染料降解和水分裂应用的新型Z--Scheme异质结。

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