可见光下Cr掺杂钛酸锶（SrTiO₃）纳米颗粒对亚甲基蓝染料的光催化降解
Photocatalytic degradation of methylene blue dye under visible light over Cr doped strontium titanate (SrTiO3) nanoparticles.
作者信息
Qazi Inamur Rahman, Lee Woo-Jin, Lee Hyun-Cheol, Hassan Mallick Shamshi, Yang O-Bong
机构信息
School of Semiconductor and Chemical Engineering and Solar Energy Research Center, Chonbuk National University, Jeonju 561-756, Republic of Korea.
出版信息
J Nanosci Nanotechnol. 2010 May;10(5):3430-4. doi: 10.1166/jnn.2010.2326.
Strontium titanate (SrTiO3) and chromium doped SrTiO3 (Cr/SrTiO3) were prepared by modified sol-gel method with the citric acid as a chelating agent in the ethylene glycol solution for the effective photodegradation of methylene blue dye under visible light irradiation. The synthesized doped and un-doped SrTiO3 nanoparticles were structurally characterized and their photoresponse performances for the efficient degradation of methylene blue dye have been demonstrated. After introducing the Cr on SrTiO3, UV-Vis absorption was appeared the red-shift at 566 nm from 392 nm as compare with bare SrTiO3. The photocatalytic degradation activity of Cr/SrTiO3 was significantly improved to 60% degradation of methylene blue in 3 h under visible light, which is approximately 5 times higher than that of the bare SrTiO3.
采用改进的溶胶-凝胶法，以柠檬酸为螯合剂，在乙二醇溶液中制备了钛酸锶（SrTiO3）和铬掺杂的钛酸锶（Cr/SrTiO3），用于在可见光照射下有效光降解亚甲基蓝染料。对合成的掺杂和未掺杂的SrTiO3纳米颗粒进行了结构表征，并证明了它们对亚甲基蓝染料高效降解的光响应性能。在SrTiO3上引入Cr后，与裸SrTiO3相比，紫外-可见吸收在566nm处出现了从392nm的红移。Cr/SrTiO3的光催化降解活性在可见光下3小时内显著提高，亚甲基蓝降解率达到60%，约为裸SrTiO3的5倍。
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