Abstract

Titanium dioxide (TiO₂) is a promising semiconductor for photocathodic protection, but the low efficiency of visible-light absorption and quantum restricts its application. In this study, graphene quantum dots-doped TiO₂ (TiO₂-GQD) nanocomposites with mesopores were prepared by a sol-gel method under ultrasonic radiation conditions. The prepared TiO₂-GQD nanocomposites exhibit excellent performance in the aspects of sunlight absorption, and photocathodic protection. It can protect the active metal and reduce the corrosion rate effectively. It is expected the TiO₂-GQD nanocomposites will be used in marine engineering to realize the efficient and sustainable development of marine corrosion protection.

摘要

二氧化钛（TiO ₂）是一种很有前途的光阴极保护半导体，但可见光吸收和量子效率低，限制了其应用。本研究采用溶胶-凝胶法在超声辐射条件下制备了石墨烯量子点掺杂的具有介孔的TiO ₂ (TiO ₂ -GQD)纳米复合材料。制备的TiO ₂ -GQD纳米复合材料在阳光吸收和光阴极保护方面表现出优异的性能。能有效保护活性金属，降低腐蚀速率。预计TiO ₂ -GQD纳米复合材料将应用于海洋工程，实现海洋腐蚀防护的高效可持续发展。