Photoluminescence of Zn5(CO3)2(OH)6 nanoparticles synthesized by utilizing CO2 and ZnO water slurry
Photoluminescence of Zn5(CO3)2(OH)6 nanoparticles synthesized by utilizing CO2 and ZnO water slurry
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DOI：
10.1016/j.jlumin.2019.05.030
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发表时间：
2019-09
影响因子：
3.6
通讯作者：
I. Yanase;Satoshi Konno
中科院分区：
文献类型：
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作者：
I. Yanase;Satoshi Konno
以氧化锌 (ZnO) 细粉为原料，方便地合成了氢氧化碳酸锌 Zn5(CO3)2(OH)6 纳米粒子，并对合成的 Zn5(CO3)2(OH)6 粉末的光致发光进行了研究。将合成的细ZnO粉末与水混合以制备ZnO浆料。然后 ZnO 浆料与 CO2 在 25°C 下反应生成 Zn5(CO3)2(OH)6。随着水/ZnO质量比和CO2与ZnO浆料反应时间的增加，Zn5(CO3)2(OH)6的量增加。合成的Zn5(CO3)2(OH)6粉末在286nm的紫外光激发下在375nm附近表现出强烈的蓝紫色发射，而细ZnO粉末在258nm的紫外光激发下在425nm左右表现出弱的红紫色发射。蓝紫色发射的强度随着Zn5(CO3)2(OH)6 量的增加而增加。 Zn5(CO3)2(OH)6 的发射光谱不同于 ZnO 和其他碳酸锌氢氧化物，如 Zn4CO3(OH)6·H2O。由于 Zn5(CO3)2(OH)6 的 Zn-O 电荷转移跃迁，蓝紫色发射随着 CO32− 中电子跃迁的紫外吸收强度的增加而增加。 Zn5(CO3)2(OH)6。因此，由于具有ZnO4和CO32−的Zn5(CO3)2(OH)6晶体结构，通过使用ZnO和CO2的传统和新颖合成方法获得的Zn5(CO3)2(OH)6纳米粒子表现出强烈的蓝紫色发射。
Zinc carbonate hydroxide, Zn5(CO3)2(OH)6, nanoparticles were conveniently synthesized from zinc oxide (ZnO) fine powders and photoluminescence of the synthesized Zn5(CO3)2(OH)6powder was investigated. The synthesized fine ZnO powder was mixed in water to prepare a ZnO slurry. The ZnO slurry was then reacted with CO2at 25 °C to produce Zn5(CO3)2(OH)6. The amount of Zn5(CO3)2(OH)6increased as the mass ratio of water/ZnO and the time of the reaction of CO2with the ZnO slurry was increased. The synthesized Zn5(CO3)2(OH)6powder exhibited a strong blue-purple emission at around 375 nm under UV-light excitation at 286 nm, while the fine ZnO powder exhibit a weak red-purple emission at around 425 nm under UV-light excitation at 258 nm. The intensity of the blue-purple emission was increased with increasing the amount of Zn5(CO3)2(OH)6. The emission spectra of Zn5(CO3)2(OH)6was different from ZnO and other zinc carbonate hydroxides such as Zn4CO3(OH)6・H2O.The blue-purple emission, owing to Zn–O charge transfer transition of the Zn5(CO3)2(OH)6, was increased with increasing UV absorption intensity of electron transitions in CO32−of Zn5(CO3)2(OH)6. Thus, the Zn5(CO3)2(OH)6nanoparticle obtained by the conventional and novel synthesis method using ZnO and CO2, exhibit a strong blue-purple emission because of the crystal structure of Zn5(CO3)2(OH)6having ZnO4and CO32−.