In this paper, the electrochemical synthesis method was used to prepare γ-Bi2O3. Ultrafine Bi metal powder was first synthesized by electrochemical method at room temperature in a single cell .The anode comprised the...In this paper, the electrochemical synthesis method was used to prepare γ-Bi2O3. Ultrafine Bi metal powder was first synthesized by electrochemical method at room temperature in a single cell .The anode comprised the sacrificial metal Bi; the cathode was Pt; the NaOH solution was used as the electrolyte. The ultrafine Bi metal powder had a special chemical reactivity. Then γ-Bi2O3 was prepared by the reaction of ultrafine Bi and NaOH solution. The effect of the concentration of NaOH solution, reaction temperature and additive were studied. The principle of the reaction was discussed. The component of the product was determined by atomic emission spectrometry and EDTA titration analysis. XRD, SEM ,TEM and DTA were employed for the characterization of the obtained products.展开更多
采用表面活性剂辅助水热法合成了系列γ-Bi2 MoO6微纳米晶粉。考察了 pH 值及不同表面活性剂对产物物相及形貌的影响。以可见光降解罗丹明 B 作为探针反应，研究了不同条件下的降解效果，对γ-Bi2 MoO6的催化活性做出了评价。研究结果...采用表面活性剂辅助水热法合成了系列γ-Bi2 MoO6微纳米晶粉。考察了 pH 值及不同表面活性剂对产物物相及形貌的影响。以可见光降解罗丹明 B 作为探针反应，研究了不同条件下的降解效果，对γ-Bi2 MoO6的催化活性做出了评价。研究结果表明：在反应物 Bi 与 Mo 物质的量比为2∶1及 pH 为3～9时，表面活性剂的加入并不影响正交晶系γ-Bi2 MoO6的形成；pH 值为9时所得产物的催化活性最高，可见光照射3 h 的降解率可达79．62％。十二烷基硫酸钠（SDS）辅助所得纳米片状γ-Bi2 MoO6具有高达98．81％的降解率。展开更多
文摘In this paper, the electrochemical synthesis method was used to prepare γ-Bi2O3. Ultrafine Bi metal powder was first synthesized by electrochemical method at room temperature in a single cell .The anode comprised the sacrificial metal Bi; the cathode was Pt; the NaOH solution was used as the electrolyte. The ultrafine Bi metal powder had a special chemical reactivity. Then γ-Bi2O3 was prepared by the reaction of ultrafine Bi and NaOH solution. The effect of the concentration of NaOH solution, reaction temperature and additive were studied. The principle of the reaction was discussed. The component of the product was determined by atomic emission spectrometry and EDTA titration analysis. XRD, SEM ,TEM and DTA were employed for the characterization of the obtained products.
文摘采用表面活性剂辅助水热法合成了系列γ-Bi2 MoO6微纳米晶粉。考察了 pH 值及不同表面活性剂对产物物相及形貌的影响。以可见光降解罗丹明 B 作为探针反应，研究了不同条件下的降解效果，对γ-Bi2 MoO6的催化活性做出了评价。研究结果表明：在反应物 Bi 与 Mo 物质的量比为2∶1及 pH 为3～9时，表面活性剂的加入并不影响正交晶系γ-Bi2 MoO6的形成；pH 值为9时所得产物的催化活性最高，可见光照射3 h 的降解率可达79．62％。十二烷基硫酸钠（SDS）辅助所得纳米片状γ-Bi2 MoO6具有高达98．81％的降解率。
