Photocatalytic abilities of gel-derived P-doped TiO2
Photocatalytic abilities of gel-derived P-doped TiO2
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DOI：
10.1016/j.jpcs.2007.01.050
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发表时间：
2007-04
影响因子：
4
通讯作者：
Hsuan-Fu Yu
中科院分区：
文献类型：
--
作者：
Hsuan-Fu Yu
通过Ti（OC 2 H5）4的水解和加入H3 PO 4的缩合反应合成了P掺杂的TiO 2纳米颗粒。研究了[H3 PO 4]/[Ti（OC 2 H5）4]摩尔比对凝胶法制备的P掺杂TiO 2锐钛矿-金红石相转变、晶粒尺寸、比表面积和光催化性能的影响。当[H3 PO 4]/[Ti（OC 2 H5）4]=0.03时制备的P掺杂TiO 2纳米粒子在900 ℃时仍为单相，具有很强的光催化活性。在365 nm紫外光照射下，对P掺杂TiO 2光催化降解亚甲基蓝的动力学进行了研究，发现在[H3 PO 4]/[Ti（OC 2 H5）4]=0.03、800 ℃煅烧的P掺杂TiO 2具有特定的反应速率，在25 ℃时，kA，m=0.76m3/（kgmin）（基于P掺杂的TiO 2的质量）和kA，BET=46.2×10− 6 m/min（基于P掺杂的TiO 2的BET表面积），这上级商业产品P25的性能（kA，m=0.22m3/（kgmin）和kA，BET=4.8×10− 6 m/min）。
P-doped TiO2nanoparticles were synthesized through hydrolysis and condensation of Ti(OC2H5)4with H3PO4additions. Effects of [H3PO4]/[Ti(OC2H5)4] molar ratios on the anatase-to-rutile phase transformation, crystallite sizes, surface areas, and photocatalytic abilities of the gel-derived P-doped TiO2were investigated. The P-doped TiO2nanoparticles prepared by [H3PO4]/[Ti(OC2H5)4]=0.03 were composed of anatase monophase even at 900oC and possessed very strong photocatalytic ability. Kinetic studies on the P-doped TiO2to photocatalytically decompose methylene blue under irradiation of 365nm UV light found that the P-doped TiO2prepared by [H3PO4]/[Ti(OC2H5)4]=0.03 and calcined at 800oC had the specific reaction rates, at 25°C, kA,m=0.76m3/(kgmin) (based on the mass of P-doped TiO2) and kA,BET=46.2×10−6m/min (based on the BET surface area of P-doped TiO2), which is superior to the performance of a commercial product, P25 (kA,m=0.22m3/(kgmin) and kA,BET=4.8×10−6m/min).