Photocatalyst Sheets Composed of Particulate LaMg1/3Ta2/3O2N and Mo-Doped BiVO4 for Z-Scheme Water Splitting under Visible Light
Photocatalyst Sheets Composed of Particulate LaMg1/3Ta2/3O2N and Mo-Doped BiVO4 for Z-Scheme Water Splitting under Visible Light
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DOI：
10.1021/acscatal.6b01561
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发表时间：
2016-10-01
期刊：
影响因子：
12.9
通讯作者：
Domen, Kazunari
中科院分区：
文献类型：
--
作者：
Pan, Zhenhua;Hisatomi, Takashi;Domen, Kazunari
通过光催化剂片分解水是一种有效和可扩展的H-2生产的有前途的方法。开发这种光催化剂片材的最重要挑战之一是具有长吸收边的光催化剂的应用。在这项研究中，RhCrOx负载LaMg 1/3 Ta 2/3 O2 N（RhCrOx/LaMg 1/3 Ta 2/3 O2 N）和Mo掺杂的BiVO 4（BiVO 4：Mo），在600和540 nm的吸收边，分别作为析氢光催化剂和析氧光催化剂的光催化剂片，进行了研究。（RhCrOx/LaMg 1/3 Ta 2/3 O 2 N）/Au/BiVO 4：Mo片表现出比相应粉末悬浮液高一倍的水裂解活性。在（RhCrOx/LaMg 1/3 Ta 2/3 O2 N）/Au/BiVO 4：Mo薄膜上涂覆一层非晶态TiO 2保护层，在可见光下实现了稳定的水分解。然而，结果显示RhCrOx/LaMg 1/3 Ta 2/3 O 2 N的低H-2释放活性对光催化剂片的活性施加了上限。ZrO 2对LaMg_（1/3）Ta_（2/3）O_（2-）N的表面改性可有效地降低LaMg_（1/3）Ta_（2/3）O_（2-）N表面的缺陷密度，提高其析氢活性。因此，当使用ZrO 2改性的LaMg 1/3 Ta 2/3 O2 N时，光催化剂片的活性几乎加倍。太阳能到氢的能量转换效率仍然很低（1 × 10（-3）%），尽管这项工作扩大了开发能够在长波长光子照射下发挥作用的光催化剂片的可能性。
-Scheme water splitting by photocatalyst sheets is a promising approach for efficient and scalable H-2 production. One of the most important challenges in developing such photocatalyst sheets is the application of photocatalysts with long absorption edges. In this study, RhCrOx-loaded LaMg1/3Ta2/3O2N (RhCrOx/LaMg1/3Ta2/3O2N) and Mo-doped BiVO4 (BiVO4:Mo), with absorption edges at 600 and 540 nm, are investigated as the hydrogen evolution photocatalyst and oxygen evolution photocatalyst in photocatalyst sheets, respectively. The (RhCrOx/LaMg1/3Ta2/3O2N)/Au/BiVO4:Mo sheet exhibits water splitting activity that is times higher than that of corresponding powder suspensions. Stable water splitting is achieved under visible light using the (RhCrOx/LaMg1/3Ta2/3O2N)/Au/BiVO4:Mo sheet coated with an amorphous TiO2 protective layer. However, the results show the low H-2 evolution activity of the RhCrOx/LaMg1/3Ta2/3O2N imposes a ceiling on the activity of the 'photocatalyst sheet. The surface modification of LaMg1/3Ta2/3O2N with ZrO2 effectively enhances its H-2 evolution activity by reducing the density of defects on the surface of LaMg1/3Ta2/3O2N. Accordingly, the activity of the photocatalyst sheet is almost doubled when ZrO2-modified LaMg1/3Ta2/3O2N is used. The solar-to-hydrogen energy conversion efficiency is still low (1 X 10(-3)%), although this work expands the possibility for the development of photocatalyst sheets capable of functioning under irradiation by long-wavelength photons.