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中文摘要：
对静电纺丝法制备的TiO2和TiO2-V2O5纳米纤维进行光催化脱除模拟烟气中Hg0的研究。对纳米纤维进行了SEM、TEM、XRD、BET和UV-Vis检测。结果表明TiO2-V2O5纳米纤维为锐钛矿,V2O5高度分散在TiO2中。纤维直径在200nm左右,由粒径为10nm左右的微粒组成。掺杂V2O5后,纤维的吸光范围扩大,在可见光范围内的吸光度比纯TiO2时有了很大提高。实验研究了不同光照条件、V2O5的掺杂量和循环次数对脱汞的影响,分析了TiO2-V2O5催化脱汞的机理。当V2O5的质量含量为3%时,TiO2-V2O5在可见光下的脱汞率可达到66%,比纯TiO2时的7%有了显著提高;纤维的脱汞性能稳定,多次循环后紫外光和可见光下的脱汞率仍分别保持在80%和65%左右。电子的跃迁和电子、空穴的快速分离是TiO2-V2O5在可见光下脱汞率提高的主要原因。
英文摘要：
对静电纺丝法制备的TiO2和TiO2-V2O5纳米纤维进行光催化脱除模拟烟气中Hg0的研究。对纳米纤维进行了SEM、TEM、XRD、BET和UV-Vis检测。结果表明TiO2-V2O5纳米纤维为锐钛矿,V2O5高度分散在TiO2中。纤维直径在200nm左右,由粒径为10nm左右的微粒组成。掺杂V2O5后,纤维的吸光范围扩大,在可见光范围内的吸光度比纯TiO2时有了很大提高。实验研究了不同光照条件、V2O5的掺杂量和循环次数对脱汞的影响,分析了TiO2-V2O5催化脱汞的机理。当V2O5的质量含量为3%时,TiO2-V2O5在可见光下的脱汞率可达到66%,比纯TiO2时的7%有了显著提高;纤维的脱汞性能稳定,多次循环后紫外光和可见光下的脱汞率仍分别保持在80%和65%左右。电子的跃迁和电子、空穴的快速分离是TiO2-V2O5在可见光下脱汞率提高的主要原因。
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