In-situ synthesis of 3D TiO2 microspheres on Ti mesh to enhance photoelectrochemical water splitting

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Bulletin Pub Date : 2024-09-15 DOI:10.1016/j.materresbull.2024.113101

Yuanmei Xu , Wenbing Chen , Xueshi Li

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Abstract

Much attention has been focused on the fabrication of TiO₂ microspheres due to their excellent properties and attractive potential in many fields. Here, undoped 3D hierarchical TiO₂ microspheres (TMS) were synthesized in situ on Ti mesh using a hydrothermal method by varying NaOH concentration, reaction time and temperature. The 3D TMS grown along the surface of the woven wires of the Ti meshes, using the metal Ti meshes as a substrate, which resulted in improved conductivity. Meanwhile, the original Ti mesh with the macroporosity (due to the 15 % open area of the mesh) can act as fast proton mass diffusion. As a result, the flexible TMS-Ti photoelectrodes exhibit an excellent current density of 1.63 mA/cm² at a potential of 1.23 V (vs Ag/AgCl). Therefore, the in situ synthesis of TiO₂ microspheres on Ti mesh is highly desirable for flexible devices.

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在钛网上原位合成三维 TiO2 微球以提高光电化学水分离效果

由于二氧化钛微球具有优异的性能和在许多领域的巨大潜力，其制备一直备受关注。本文采用水热法，通过改变 NaOH 浓度、反应时间和温度，在钛网上原位合成了未掺杂的三维分层 TiO2 微球（TMS）。三维 TMS 以金属 Ti 网为基底，沿着 Ti 网的编织线表面生长，从而提高了导电性。同时，具有大孔隙率的原始 Ti 网（由于网的开口面积为 15%）可以起到快速质子质量扩散的作用。因此，柔性 TMS-Ti 光电极在 1.23 V 的电位（相对于 Ag/AgCl）下可显示出 1.63 mA/cm2 的出色电流密度。因此，在钛网上原位合成二氧化钛微球对于柔性设备来说是非常理想的。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.