Abstract
Porous titanium dioxide (TiO2) materials are pivotal in broad catalytic applications. However, design and development of macro‐mesoporous TiO2 involve a hard or soft templating method, which impedes the additional cost and complexity. Herein, a simple, scalable, and template‐free synthesis route to ordered uniform macro‐mesoporous TiO2 (mTiO2) layers is presented. The controlled aging of titanium tetraisopropoxide precipitates self‐assemble into an extended macroporous TiO2 network. As proved by X‐ray diffraction, the prepared materials are of anatase TiO2. Morphological analysis of mTiO2 displays a uniform macroporous network. To delight, the obtained mTiO2 possesses an extensive specific surface area of 257 m2 g−1, with an average pore size of ≈2 nm. This simplistic method provides a high yield of mTiO2 products. To find the practical utility of mTiO2, visible light active graphitic carbon nitride (g‐C3N4) is combined with mTiO2 and examined for photo fixation of dinitrogen (N2) and decomposition of organic pollutants. Remarkably, the mTiO2/g‐C3N4 interface shows drastically enhanced NH4+ production and dye degradation photocatalytic activity as compared with g‐C3N4 and commercial TiO2. This versatile and eco‐friendly preparation process of surface‐rich mTiO2 is scalable and may find widespread potential in large‐scale photocatalytic applications.
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