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在碱性条件下([NaOH] =0.008 mol/mL),以氯化钡(BaCl2·2H2O)和氧氯化锆(ZrOCl2·8H2O)为原料,采用传统水热法在低温下制备了锆酸钡(BaZrO3)微晶.利用XRD和SEM分别对产物进行了物相组成及微晶形貌的测试与表征.研究了反应温度为135℃时不同反应时间对产物微观结构及形貌变化的影响.结果表明:在135℃下反应2h即可合成纯相的BaZrO3粉体,且随着水热温度的升高,产物由无定形态变为类球状结构最终变为棱角分明的菱形十二面体结构,结晶程度提高,晶粒尺寸增大.通过对其结晶动力学研究,计算得到BagrO3微晶的表观成核活化能为24.36 kJ/mol.

参考文献

[1] Niki Prastomo;Nor Hana binti Zakaria;Go Kawamura .High surface area BaZrO_3 photocatalyst prepared by base-hot-water treatment[J].Journal of the European Ceramic Society,2011(14):2699-2705.
[2] Zhouguang Lu;Yougen Tang;Limiao Chen;Yadong Li .Shape-controlled synthesis and characterization of BaZrO_3 microcrystals[J].Journal of Crystal Growth,2004(4):539-544.
[3] Jitputti J;Pavasupree S;Suzuki Y;Yoshikawa S .Synthesis and photocatalytic activity for water-splitting reaction of nanocrystalline mesoporous titania prepared by hydrothermal method[J].International Journal of Quantum Chemistry,2007(5):1743-1749.
[4] Yupeng Yuan;Xueliang Zhang;Lifei Liu;Xiaojun Jiang;Jun Lv;Zhaosheng Li;Zhigang Zou .Synthesis And Photocatalytic Characterization Of A New Photocatalyst Bazro_3[J].International journal of hydrogen energy,2008(21):5941-5946.
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