纳米TiO_2光催化萘转化为α-萘酚(英文)  

Photocatalytic Conversion of Naphthalene to α-Naphthol Using Nanometer-Sized TiO_2

作　　者：史慧贤[1] 张天永[1,2] 王红亮[3] 王晓[1] 何萌[1] 

机构地区：[1]天津大学化工学院,天津300072 [2]福州大学福建省光催化重点实验室,福建福州350002 [3]天津大学药物科学与技术学院,天津300072

出　　处：《催化学报》2011年第1期46-50,共5页

基　　金：Supported by the State Key Laboratory Breeding Base of Photocatalysis,Fuzhou University (K-081027)

摘　　要：研究了共溶剂、电子受体和表面改性等因素对TiO2光催化萘直接合成α-萘酚反应的影响.纳米TiO2催化剂在紫外光射下产生·OH,使得萘羟基化得到α-萘酚.在TiO2体系中加入Fe3+,Fe2+,Fe3++H2O2和Fe2++H2O2时,均可有效提高萘转化率α-萘酚收率,其中以体系中加入Fe3++H2O2时,α-萘酚收率最大,为22.2%.TiO2经表面改性后所得样品La-Eu/TiO2,La-Y/TiOH3PW12O40/TiO2,H3PMo12O40/TiO2,Fe/TiO2,Ag/TiO2,Cu/TiO2和N/TiO2,萘转化率和α-萘酚收率均有所提高,其中以Fe/TiO2催化效率最高.The effects of various parameters（co-solvents,electron acceptors,and surface modification） on the direct synthesis of α-naphthol from naphthalene using photocatalytic processes were investigated.The ·OH radicals generated on UV-illuminated TiO2 photocatalysts led to the direct hydroxylation of naphthalene to α-naphthol.The addition of Fe3＋,Fe2＋,Fe3＋ ＋ H2O2,and Fe2＋ ＋ H2O2 greatly increases the conversion of naphthalene and the yield of α-naphthol in TiO2 suspensions.The addition of Fe3＋ ＋ H2O2 to a TiO2 suspension increased the yield to 22.2%.Surface modified-TiO2 had a significant influence on the hydroxylation reaction.La-Eu/TiO2,La-Y/TiO2,H3PW12O40/TiO2,H3PMo12O40/TiO2,Fe/TiO2,Ag/TiO2,Cu/TiO2,and N/TiO2 enhanced the conversion and yield more than TiO2.Fe/TiO2 has the highest photocatalytic efficiency among these species.

关 键 词：二氧化钛 改性 光催化 萘 Α-萘酚 

分 类 号：O643.36[理学—物理化学]