The porous structure and honeycombed structure of granulated blast furnace slag formed by alkali activation(AGBFS)can be used as a promising photocatalysts substrate for the photocatalytic removal of atmospheric or wa...The porous structure and honeycombed structure of granulated blast furnace slag formed by alkali activation(AGBFS)can be used as a promising photocatalysts substrate for the photocatalytic removal of atmospheric or water pollutants.In this study,photocatalytic activated slag granules were synthesized by loading TiO_(2)on AGBFS with immersion method.The physicochemical properties and NO_(x)removal performance of activated slag granules/TiO_(2)photocatalysts were studied by X-ray diffraction(XRD),scanning electron microscope(SEM)and photocatalytic performance test.The effects of slag particle sizes and nano-TiO_(2)loading concentrations on photocatalytic efficiencies of NO_(x)removal were also investigated.It was found that the De-NO_(x)performance of activated slag granules/TiO_(2)photocatalyst increased with the increasing of slag particle size in low TiO_(2)loading concentration situation,while increasing the TiO_(2)loading concentration would result in the opposite De-NO_(x)performance as slag size increased.Nevertheless,for the same size activated slag,the photocatalytic efficiency of activated slag granules/TiO_(2)photocatalyst gradually improved with the increase of loading concentration of TiO_(2).展开更多
基金Funded by the China National Key R&D Program(No.2018YFE0106300)the Natural Science Foundation of China(No.51802238)the Fundamental Research Funds for the Central Universities(Nos.WUT2018IVA011,WUT2018III022,2019IVB060,2020-zy-015,and 2020-zy-016)。
文摘The porous structure and honeycombed structure of granulated blast furnace slag formed by alkali activation(AGBFS)can be used as a promising photocatalysts substrate for the photocatalytic removal of atmospheric or water pollutants.In this study,photocatalytic activated slag granules were synthesized by loading TiO_(2)on AGBFS with immersion method.The physicochemical properties and NO_(x)removal performance of activated slag granules/TiO_(2)photocatalysts were studied by X-ray diffraction(XRD),scanning electron microscope(SEM)and photocatalytic performance test.The effects of slag particle sizes and nano-TiO_(2)loading concentrations on photocatalytic efficiencies of NO_(x)removal were also investigated.It was found that the De-NO_(x)performance of activated slag granules/TiO_(2)photocatalyst increased with the increasing of slag particle size in low TiO_(2)loading concentration situation,while increasing the TiO_(2)loading concentration would result in the opposite De-NO_(x)performance as slag size increased.Nevertheless,for the same size activated slag,the photocatalytic efficiency of activated slag granules/TiO_(2)photocatalyst gradually improved with the increase of loading concentration of TiO_(2).
