Single-step synthesis and catalytic activity of structure-controlled nickel sulfide nanoparticles
Single-step synthesis and catalytic activity of structure-controlled nickel sulfide nanoparticles
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DOI：
10.1039/c5ce00742a
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发表时间：
2015-01-01
期刊：
影响因子：
3.1
通讯作者：
Hayakawa, Yasuhiro
中科院分区：
文献类型：
--
作者：
Karthikeyan, Rajan;Thangaraju, Dheivasigamani;Hayakawa, Yasuhiro
以单质硫和六水合硝酸镍为原料，采用温度控制的前驱体注入法制备了纳米级单相硫化镍，如NiS、NiS 2、Ni 3S 4和Ni 7S 6。源的浓度的初始比率用于控制最终产物的尺寸和相。使用X-射线衍射和透射电子显微镜确认相控制。将合成的具有金属特性的硫化镍催化剂用于对硝基苯酚的催化还原反应。结果表明，NiS纳米粒子对对硝基苯酚还原为4-氨基苯酚的催化活性高于其他硫化镍相。此外，该纳米晶对4-硝基苯酚的还原具有良好的分离能力和可重复使用性。
Nanoparticle single-phase nickel sulfides such as NiS, NiS2, Ni3S4, and Ni7S6 were prepared from elemental sulfur and nickel nitrate hexahydrate, using a temperature-controlled precursor injection method. The initial ratio of the concentrations of the sources was used to control the size and phase of the final product. Phase control was confirmed using X-ray diffraction and transmission electron microscopy. The synthesized nickel sulfide phases, which had metallic characteristics, were used to study the catalytic reduction of 4-nitrophenol. The results showed that the catalytic activity of the NiS nanoparticles in the reduction of 4-nitrophenol to 4-aminophenol was higher than those of the other nickel sulfide phases. In addition, the nanocrystals showed good separation ability and reusability for reduction of 4-nitrophenol.