Synthesis and application of CoWO4 nanoparticles for degradation of methyl orange
Synthesis and application of CoWO4 nanoparticles for degradation of methyl orange
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DOI：
10.1007/s10854-016-5002-7
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发表时间：
2016-09-01
影响因子：
2.8
通讯作者：
Daneshmand, Mohamadhossein
中科院分区：
文献类型：
--
作者：
Ahmadi, Farhad;Rahimi-Nasrabadi, Mehdi;Daneshmand, Mohamadhossein
本研究尝试在水溶液中以硝酸钴（II）和二水合钨酸钠为辅助原料，采用大规模易沉淀法合成钨酸钴（CoWO4）纳米颗粒。此外，采用十二烷基硫酸钠、十二烷基苯磺酸钠和四乙酸乙二胺三种表面活性剂考察了它们对CoWO4纳米颗粒形貌和粒径的影响。采用XRD、SEM、EDS和UV-Vis光谱对CoWO4纳米颗粒的结构、形貌和光学性质进行了表征。根据振动样品磁强计的结果，CoWO4纳米颗粒在室温下表现出顺磁性。另外，以甲基橙为染料污染物，考察了紫外光照射下合成钨酸铜对甲基橙的降解效果。此外，光催化结果表明，CoWO4纳米颗粒在紫外光照射下，在70 min内对甲基橙的脱色率最高达到70%。
In the current study, an attempt is made to synthesize cobalt tungstate (CoWO4) nanoparticles via a large-scale and facile precipitation method with the aid of cobalt (II) nitrate and sodium tungstate dihydrate in an aqueous solution. Besides, three surfactant agents such as sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, and ethylene diamine tetra acetic acid were used to investigate their effects on the morphology and particle size of CoWO4 nanoparticles. XRD, SEM, EDS, and UV-Vis spectroscopy were employed to characterize structural, morphological, and optical properties of CoWO4 nanoparticles. According to the vibrating sample magnetometer result, CoWO4 nanoparticles indicated a paramagnetic behavior at room temperature. In addition, methyl orange was chosen as a dye water pollution to evaluate its degradation by as-synthesize copper tungstate under ultraviolet light irradiation. Furthermore, the photocatalysis results reveal that the maximum decolorization of 70 % for methyl orange occurred with CoWO4 nanoparticles in 70 min under ultraviolet (UV) light irradiation.