In this paper, the shapes of TiO₂ were regulated by changing the solvent and hydrothermal temperature. CeO₂–WO₃/TiO₂ catalysts were further synthesized by impregnation method and used for selective catalytic reduction (SCR) of NO_x. By a series of regulations, the SCR performance was improved by the further modulation of TiO₂ shape. The results showed that with the hydrothermal temperature increase from 80 to 200 °C, and the shape of catalysts emerged particle state, rod-like structure, flower-like structure and large particle state, respectively. The formation process of flower-like TiO₂ was proposed according to the shape change with the increase of hydrothermal temperature. Prominently, the shape of TiO₂ precursor would change the crystallographic plane of CeO₂–WO₃/TiO₂-A catalysts. When the hydrothermal temperature was 120 °C, the catalysts showed the best SCR performance. This might be due to the high surface atomic ratio of O_α/(O_α + O_β) and the high transformation of Ce³⁺ and Ce⁴⁺, which were beneficial for the SCR performance. CeO₂–WO₃/TiO₂-A-120 also exhibited an excellent resistance of H₂O. However, when enduring the SO₂ or both enduring the SO₂ and H₂O, the activity of catalysts had an obvious decrease due to the production of Ce₂(SO₄)₃.

本文通过改变溶剂和水热温度来调节TiO ₂的形状。通过浸渍法进一步合成了CeO ₂ -WO ₃ / TiO ₂催化剂，并用于NO _x的选择性催化还原（SCR）。通过一系列法规，通过进一步调制TiO ₂形状提高了SCR性能。结果表明，随着水热温度从80℃升高到200℃，催化剂的形状分别呈颗粒状，棒状，花状和大颗粒状。花状TiO ₂的形成过程根据形状随水热温度的升高而提出。明显地，TiO ₂前体的形状会改变CeO ₂ -WO ₃ / TiO ₂ -A催化剂的晶面。当水热温度为120°C时，催化剂表现出最佳的SCR性能。这可能是由于_Oα /（_Oα  + _Oβ）的高表面原子比以及Ce ³⁺和Ce ⁴⁺的高转化率，这对于SCR性能是有利的。CeO ₂ –WO ₃ / TiO ₂ -A-120也表现出出色的H ₂电阻O.然而，当忍受SO ₂或同时忍受SO ₂和H ₂ O时，由于产生Ce ₂（SO ₄）₃，催化剂的活性明显降低。