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首页> 外文会议>Air and Waste Management Association annual conference and exhibition >Enhanced Photocatalytic Adsorption of Elemental Mercury (Hg~0) by Modified Photocatalyst TiO_2 in Simulated Flue Gas
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Enhanced Photocatalytic Adsorption of Elemental Mercury (Hg~0) by Modified Photocatalyst TiO_2 in Simulated Flue Gas

机译：改性光催化剂TiO_2在模拟烟气中增强对元素汞（Hg〜0）的光催化吸附

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This study investigated the characterization and photo-oxidation of TiO_2 and the modified TiO_2 prepared by using the hydrothermal method. The characterization results showed that the SEM and XRD of WO_3/TiO_2, ZrO_2/TiO_2 and V_2O_5/TiO_2 were the same as the TiO_2's. The UV-visible adsorption of the modified TiO_2 presented obvious red-shift compared to TiO_2, which illustrated that the modified TiO_2 could adsorb more visible light. The character of photo-oxidation above 100°C was the adsorption efficiency decreased as temperature rose. The 100% of TiO_2 at 100°C decreased to 30% at 160°C which inhibited the application at high temperatures. Compared with TiO_2, l%WO_3/TiO_2 could promote the 30% efficiency at 140°C and 160°C, which indicated that it's worth preparing for cost reduction. However, to increase WO_3 such as 3% WO_3/TiO_2 and 5%WO_3/TiO_2 would decrease the adsorption efficiency adversely. The removal of Hg~0 by V_2O_5/TiO_2 was influenced by thermal oxidation and photo-oxidation. The efficiency due to photo-oxidation following thermal oxidation were enhanced. However, the thermal oxidation efficiency of V_2O_5/TiO_2 exceeded the photo-oxidation efficiency at 140°C and 160°C, suggesting that the irradiation is harmful of V_2O_5/TiO_2 to removal Hg~0. The addition of ZrO_2 didn't enhance the photo-oxidation of TiO_2.
机译：本研究研究了水热法制备的TiO_2和改性TiO_2的表征和光氧化性能。表征结果表明，WO_3 / TiO_2，ZrO_2 / TiO_2和V_2O_5 / TiO_2的SEM和XRD与TiO_2相同。与TiO_2相比，改性TiO_2的紫外可见吸收表现出明显的红移，表明改性TiO_2可以吸收更多的可见光。 100℃以上的光氧化特征是吸附效率随温度升高而降低。 TiO_2在100°C时100％降至160°C时的30％，这抑制了高温下的应用。与TiO_2相比，l％WO_3 / TiO_2可以在140°C和160°C时提高30％的效率，这表明有必要为降低成本做准备。然而，增加WO_3，例如3％WO_3 / TiO_2和5％WO_3 / TiO_2会不利地降低吸附效率。 V_2O_5 / TiO_2对Hg〜0的去除受到热氧化和光氧化的影响。热氧化后由于光氧化而产生的效率得到提高。然而，V_2O_5 / TiO_2的热氧化效率超过了140℃和160℃时的光氧化效率，表明辐照对V_2O_5 / TiO_2的去除有害于Hg〜0。 ZrO_2的加入并没有增强TiO_2的光氧化作用。

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