热处理催化剂的活性比未热处理的高。
The activity of heat treatment catalysts was higher than that of the unheated one.
XRD分析的结果表明，热处理催化剂活性的提高看来主要是由晶格结构改变的结果引起的。
The results of XRD analysis showed that the enhanced activity of heat-treated catalysts appeared to originate primarily as a result of the change in the lattice structure.
在热处理过程中，催化剂粒子有凝聚现象。
Coagulation of photo catalytic particles, however, was observed during the heat treatment process.
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