In Situ Conversion of Ti3C2 MXene to Sandwich Ti3C2/R-TiO2 for Promoted Photocatalytic Hydrogen Production,ACS Applied Energy Materials

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In Situ Conversion of Ti3C2 MXene to Sandwich Ti3C2/R-TiO2 for Promoted Photocatalytic Hydrogen Production
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2023-05-09 , DOI: 10.1021/acsaem.3c00541
Ke Wei ₁ , Jiu-Xiang Yang ₁ , Fang-Yuan Bai ₁ , Yuan-Sheng Shen ₁ , Kai Liu ₁ , Jing Liu ₁ , Li-Hua Chen ₁ , Yu Li ₁ , Bao-Lian Su _{1,

2}

Affiliation

Ti₃C₂ MXene has been extensively studied in the field of photocatalytic hydrogen production since its discovery due to the large specific surface area and adjustable surface groups. However, the weak interaction at the interface of Ti₃C₂-based composites leads to a high energy barrier, which is not conducive to carrier transport. Herein, we propose the construction of a sandwich Ti₃C₂/R-TiO₂ composite photocatalyst by in situ growing rutile TiO₂ (R-TiO₂) nanoneedles in Ti₃C₂ MXene through NaOH oxidation treatment and the microwave hydrothermal method. This in situ synthesis can make Ti₃C₂ MXene and TiO₂ nanoneedles closely link together, which is conducive to carrier transport and material stability. The best Ti₃C₂/R-TiO₂ composite achieves an excellent hydrogen production rate of 1.62 mmol g^–1 h^–1, as endowed by the 2D nanosheet-constructed sandwich structure, an increased specific surface area, and improved charge carrier separation and transport.

中文翻译：

Ti3C2 MXene 原位转化为夹层 Ti3C2/R-TiO2 以促进光催化制氢

Ti ₃ C ₂ MXene由于具有较大的比表面积和可调的表面基团，自发现以来在光催化制氢领域得到广泛研究。_{然而，Ti 3} C ₂基复合材料界面弱相互作用导致能垒高，不利于载流子传输。在此，我们提出通过在 Ti ₃ C ₂中原位生长金红石 TiO ₂ (R-TiO ₂ ) 纳米针构建三明治 Ti ₃ C ₂ /R-TiO _{2复合光催化剂}MXene通过NaOH氧化处理和微波水热法。这种原位合成可以使Ti ₃ C ₂ MXene和TiO ₂纳米针紧密连接在一起，有利于载流子传输和材料稳定性。最好的 Ti ₃ C ₂ /R-TiO _{2复合材料实现了 1.62 mmol g}^–1 h ^–1的出色产氢率，这得益于二维纳米片构造的三明治结构、增加的比表面积和改进的载流子分离和运输。

更新日期：2023-05-09

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