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Photocatalytic Removal of Aqueous Cr(Vi) By N-F Co-doped TiO2-pillared Clay

机译:N-F共掺杂TiO2柱状粘土光催化去除Cr(Vi)水溶液

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This study prepared N-F co-doped TiO2-pillared clay nanocomposites bythe sol-gel method and evaluated the effects of initial Cr(VI) concentration, pillaring, dopingand light irradiation on Cr(VI) removal in aqueous solution. The samples were characterizedusing XRD, BET, UV-vis and SEM. Pillaring improved the adsorption abilityand settling ability of TiO2 but reduced the photocatalytic reduction ability. N-F co-dopingcreated an increase on both adsorption ability and photocatalytic reduction ability. Theworking life of TiO2 was prolonged greatly both by pillaring and N-F co-doping. Further,stronger light power or lower initial Cr(VI) concentration increased the removal efficiencyof Cr(VI).
机译:本研究通过溶胶-凝胶法制备了N-F共掺杂的TiO2柱状粘土纳米复合材料,并评估了初始Cr(VI)浓度,立柱,掺杂和光辐照对水溶液中Cr(VI)去除的影响。使用XRD,BET,UV-vis和SEM对样品进行表征。柱撑提高了TiO2的吸附能力和沉降能力,但降低了光催化还原能力。 N-F共掺杂增加了吸附能力和光催化还原能力。柱撑法和N-F共掺杂法均大大延长了TiO2的使用寿命。此外,更高的光功率或更低的初始Cr(VI)浓度可提高Cr(VI)的去除效率。

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