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首页> 外文期刊>Journal of King Saud University >Synthesis, characterization and photocatalytic properties of Bi 0.85?XM XBa 0.15FeO 3 (M?=?Na and K, X?=?0, 0.1) perovskite-like nanoparticles using the sol-gel method
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Synthesis, characterization and photocatalytic properties of Bi 0.85?XM XBa 0.15FeO 3 (M?=?Na and K, X?=?0, 0.1) perovskite-like nanoparticles using the sol-gel method

机译：Bi 0.85？X M X Ba 的合成，表征和光催化性能loc =“ post”> 0.15 FeO 3 （M？=？Na和K，X？=？0，0.1）钙钛矿-像使用溶胶-凝胶法的纳米粒子

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Bismuth barium ferrite Bi0.85?xMxBa0.15FeO3(M?=?Na and K, x?=?0, 0.1) nanoparticles doped with sodium and potassium metal ions were synthesized via the citric acid (4.0?×?10?1moldm?3) route in the presence of sodium dodecyl sulfate, SDS (0.35 moldm?3) by sol-gel method. The obtained powders were pre-calcined at 400?°C for 4?h. Separate portions each of the powders were annealed at temperatures of 600, 700 and 800?°C for 4?h. The powders were characterized using the X-ray diffraction (XRD) method, which indicated that the powders have a perovskite structure which have crystallized in rhombohedral lattice. Scanning electron microscopy (SEM) images showed clusters of polycrystalline nanoparticles having uniform sizes. Fourier Transform Infra-red (FTIR) spectrophotometer was used to investigate the B-site formation and purity of the perovskite nanoparticle. The Uv-vis DRS spectrum of the powders was also determined. The performance of the powder as photocatalyst was evaluated using a model organic pollutant, Methylene blue, under visible light irradiation for 2?h. The Na and K doped powders showed a very useful application for photodegradation of the dye under the visible light region. Studies in this research showed that powders annealed at 400?°C were not very active and that activity increased with increased in annealing temperature. The photocatalytic activities of the powders is enhanced with the addition of peroxide (H2O2) and the effect of pH was investigated.
机译：通过柠檬酸（4.0≤x≤10≤1moldm2）合成掺有钠和钾金属离子的铋钡铁氧体Bi0.85≤xMxBa0.15FeO3（M≤＝ Na和K，x≤＝ ≤0，0.1）。 3）通过溶胶-凝胶法在十二烷基硫酸钠，SDS（0.35mol·m 3）存在下的途径。将得到的粉末在400℃下预煅烧4小时。将每种粉末分别在600、700和800℃的温度下退火4小时。使用X射线衍射（XRD）方法对粉末进行表征，这表明粉末具有钙钛矿结构，其已经在菱面体​​晶格中结晶。扫描电子显微镜（SEM）图像显示具有均匀尺寸的多晶纳米颗粒簇。傅里叶变换红外（FTIR）分光光度计用于研究钙钛矿纳米粒子的B位形成和纯度。还确定了粉末的Uv-vis DRS光谱。使用模型有机污染物亚甲基蓝在可见光照射2？h下评估粉末作为光催化剂的性能。掺杂有Na和K的粉末在可见光区域内显示出非常有用的用于染料光降解的应用。这项研究的研究表明，在400°C退火的粉末活性不高，并且活性随着退火温度的升高而增加。加入过氧化物（H2O2）可增强粉末的光催化活性，并研究了pH的影响。

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