Developing a way to prepare effective, durable and high-temperature stable anatase-based photocatalytic ceramic is of great significance. In this work, we report a crystallization method for the preparation of anatase-based glass-ceramic glaze. The raw materials were made into frit and glazed on ceramic bodies. The glazed ceramics were sintered at 1180 °C and soaked at 700 °C. The effect of soaking temperature on the crystallization process was investigated. The photocatalytic property of the glazed tiles was evaluated by degradation of methyl orange. Experimental results show that after sintering and soaking at 700 °C, nanosized anatase grains crystallize in glaze. The crystallization of anatase nanograins is attributed to the relative high viscosity at crystallization temperature. HF etching makes more anatase grains exposed on the surface. The sample etched for 45 seconds shows the highest photocatalytic activity and the methyl orange is decomposed by about 90% after illumination for 35 h.

开发一种制备有效，耐久和高温稳定的基于锐钛矿的光催化陶瓷的方法具有重要意义。在这项工作中，我们报告了一种用于制备基于锐钛矿型玻璃陶瓷釉的结晶方法。原材料被制成玻璃料，并在陶瓷体上上釉。釉面陶瓷在1180°C下烧结，并在700°C下浸泡。研究了保温温度对结晶过程的影响。釉面砖的光催化性能通过甲基橙的降解来评估。实验结果表明，在700°C下烧结和浸泡后，锐钛矿型纳米晶在釉中结晶。锐钛矿型纳米晶的结晶归因于结晶温度下相对较高的粘度。HF蚀刻使更多的锐钛矿晶粒暴露在表面上。