CAJ | 학술논문

以六钽酸钠（Na8 Ta6 O19）为原料，采用水热法实现了烧绿石型 Na2 Ta2 O6、钙钛矿型NaTaO3以及Na2 Ta2 O6／NaTaO3复合光催化剂的可控合成。通过X射线衍射、场发射扫描电子显微镜、紫外‐可见漫反射光谱对样品进行了表征，研究了水热反应中碱浓度、溶剂类型、pH值等对钽酸钠晶体结构和形貌的影响。光催化降解亚甲基蓝结果表明，光催化降解活性顺序为Na2 Ta2 O6／NaTaO3＞Na2 Ta2 O6＞NaTaO3，复合相中Na2 Ta2 O6和NaTaO3之间形成了异质结，能够有效的抑制光生电子空穴对的复合。
이륙단산납（Na8 Ta6 O19）위원료，채용수열법실현료소록석형 Na2 Ta2 O6、개태광형NaTaO3이급Na2 Ta2 O6／NaTaO3복합광최화제적가공합성。통과X사선연사、장발사소묘전자현미경、자외‐가견만반사광보대양품진행료표정，연구료수열반응중감농도、용제류형、pH치등대단산납정체결구화형모적영향。광최화강해아갑기람결과표명，광최화강해활성순서위Na2 Ta2 O6／NaTaO3＞Na2 Ta2 O6＞NaTaO3，복합상중Na2 Ta2 O6화NaTaO3지간형성료이질결，능구유효적억제광생전자공혈대적복합。
Pyrochlore structure (Na2 Ta2 O6 ) ,perovskite structure (NaTaO3 ) and composite of sodium tantalate (Na2 Ta2 O6/NaTaO3 ) photocatalysts were controllably synthesized using sodium hexatantalate (Na8 Ta6 O19 ) as precursor via hydrothermal method .The physical properties of the as‐prepared samples were characterized by X‐ray diffraction(XRD) ,field e‐mission scanning electron microscope (FE‐SEM ) and UV‐vis diffuse reflectance spectra (DRS) and the effects of the alkali concentration ,solvent type and pH on the crystal struc‐ture and morphology of the sodium tantalate were discussed .The photocatalytic degradation results of methylene blue indicated that the activity was in the following order :Na2 Ta2 O6/NaTaO3 > Na2 Ta2 O6 > NaTaO3 .The highest photocatalytic activity of Na2 Ta2 O6/NaTaO3 can be attributed to that heterojunction was formed between the Na2 Ta2 O6 and NaTaO3 par‐ticles and the heterojunction significantly prevented the recombination of the electron‐hole pairs .