CAJ | 학술논문

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催化剂在紫外光照射下产生·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和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/TiO2,H3PW12O40TiO2,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光催化效率最高.
연구료공용제、전자수체화표면개성등인소대TiO2광최화내직접합성α-내분반응적영향.납미TiO2최화제재자외광조사하산생·OH,사득내간기화득도α-내분.재TiO2체계중가입Fe3+,Fe2+,Fe3++H2O2화Fe2++H2O2시,균가유효제고내전화솔화α-내분수솔,기중이체계중가입Fe3++H2O2시,α-내분수솔최대,위22.2%.TiO2경표면개성후소득양품La-Eu/TiO2,La-Y/TiO2,H3PW12O40TiO2,H3PMo12O40/TiO2,Fe/TiO2,Ag/TiO2,Cu/TiO2화N/TiO2,내전화솔화α-내분수솔균유소제고,기중이Fe/TiO2광최화효솔최고.
The effects of various parameters (co-solvents, electron acceptors, and surface modification) on the direct synthesis of a-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 a-naphthol. The addition of Fe3+, Fe2+, Fe3++ H2O2, and Fe2t+ H2O2 greatly increases the conversion of naphthalene and the yield of a-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, H3PWi2O40/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.