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中文摘要：
以硝酸铋为前驱体，通过一步沉淀法在室温下反应1h合成了BiO1.8·0．04H2O纳米光催化剂。通过XRD，SEM，TEM，XPS和紫外可见漫反射等研究了催化剂的物理化学性质。合成的BiO1.8·0．04H2O纳米颗粒具有孔径为14．8nm的介孔结构，禁带宽度为3．05eV。BiO1.8·0．04H2O纳米颗粒被用来去除气相污染物NOx，并表现出良好的光催化活性，超过了Bi2O3和TiO2（P25）的光催化活性。通过活性的循环测试可知，该光催化剂具有良好的稳定性。本研究能为低温合成铋基光催化剂提供一种新颖而简单的方法。
英文摘要：
The BiO1.8· 0.04H2O nanoparticles were synthesized by a facile one-pot precipitation method at room temperature within 1 h using bismuth nitrate as precursor. The physicochemical properties of the as-prepared samples were characterized by XRD, SEM, TEM, XPS and UV-vis diffuse reflection spectra. The aggregation of nanoparticles result in the formation of mesoporous structure with a peak pore size at 14. 8 nm. The BiO1.8· 0.04H2O has a band gap of 3. 05 eV. The BiO1.8· 0.04H2O nanoparticles are applied for photocatalytic removal of NOx in air and exhibit higher activity than that of Bi203 and Ti02 （P25）. The sample also demonstrates high photoeatalytic stability under repeated runs. The present work can provide a new and simple strategy for low temperature synthesis of bismuth-based photocatalysts.
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