CAJ | 학술논문

以炭膜包裹的形式将 TiO2固载到微纳米多孔碳质材料表面,制得微纳米多孔炭/TiO2复合材料(MNC-TiO2).采用X射线衍射仪、扫描电子显微镜、透射电子显微镜、比表面积及孔径分析仪和X射线光电子能谱对材料的结构进行表征.结果表明:当溶液的蔗糖含量为0.5%、TiO2负载量为10%,热处理温度为750℃时,复合材料具有最好的苯酚处理性能(达92.7%);炭膜包裹工艺保证TiO2均匀涂覆在MNC的外表面,抑制TiO2的晶型转变,且降低其禁带宽度;吸附–催化的协同作用机制使得MNC-TiO2对于苯酚的总体处理效果大幅提高,而不是吸附和光催化的简单叠加.
이탄막포과적형식장 TiO2고재도미납미다공탄질재료표면,제득미납미다공탄/TiO2복합재료(MNC-TiO2).채용X사선연사의、소묘전자현미경、투사전자현미경、비표면적급공경분석의화X사선광전자능보대재료적결구진행표정.결과표명:당용액적자당함량위0.5%、TiO2부재량위10%,열처리온도위750℃시,복합재료구유최호적분분처이성능(체92.7%);탄막포과공예보증TiO2균균도복재MNC적외표면,억제TiO2적정형전변,차강저기금대관도;흡부–최화적협동작용궤제사득MNC-TiO2대우분분적총체처리효과대폭제고,이불시흡부화광최화적간단첩가.
@@@@A micro/nano-porous carbon material-TiO2 (MNC-TiO2) was prepared by immobilized carbon coated TiO2 to the surface of MNC. The microstructure of the MNC-TiO2 was analyzed by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption and X-ray photoelectron spectroscopy (XPS). The results show that, at the sucrose content of 0.5% in solution, TiO2 loading of 10% and heat treatment temperature of 750℃, the MNC-TiO2 has the best phenol removal efficiency of 92.7%. In addition, MNC-TiO2 still retains the original morphology of MNC. TiO2 were mainly introduced on the outer surface of MNC-TiO2 while little in internal pores. The structure restrains the transformation of TiO2 crystal and reduces its band gap. The adsorption-photocatalytic synergistic mechanism plays the key role in improving the effect of adsorption-photocatalytic degradation. The overall phenol treatment by MNC-TiO2 is not a simple sum of adsorption and photocatalytic activity.