层状硅酸镍纳米管催化剂的可控制备及其催化性能研究

doi:10.19964/j.issn.1006-4990.2022-0501

摘要/Abstract

摘要：

通过水热法合成了具有管状结构的层状硅酸镍纳米管材料，并考察了水热反应温度、时间、压力和氢氧化钠用量等对材料形貌和结构的影响。结果表明，氢氧化钠用量、水热反应温度、反应时间是影响层状硅酸镍纳米管形成的关键因素，而水热反应压力对层状硅酸镍纳米管材料的形成无明显影响。确定了层状硅酸镍纳米管材料合成的最佳水热反应条件：水热反应温度为200 ℃、水热反应压力为2 MPa、n（Ni）∶n（NaOH）=1∶（54~72）、水热反应时间为12 h。此外，考察了层状硅酸镍纳米管催化剂在二氧化碳甲烷化反应中的催化性能，结果表明层状硅酸镍纳米管催化剂表现出了优异的二氧化碳甲烷化反应催化性能和反应稳定性，经过72 h的反应测试，催化剂性能没有明显降低，也没有出现镍纳米颗粒团聚烧结现象。

关键词: 层状硅酸镍纳米管, 镍基催化剂, 可控合成, 甲烷化, 烧结

Abstract:

Nickel phyllosilicate nanotubes（Ni-PSNTs） materials with tubular structure were synthesized by hydrothermal method.The effects of hydrothermal reaction temperature，time，pressure，and sodium hydroxide content on the morphology and structure of the materials were investigated.The results showed that the amount of sodium hydroxide，hydrothermal reaction temperature，and reaction time were key factors affecting the formation of Ni-PSNTs，while the hydrothermal reaction pressure had no significant impact on the formation of Ni-PSNTs.The optimal hydrothermal reaction conditions for the synthesis of Ni-PSNTs materials were determined as hydrothermal reaction temperature of 200 ℃，hydrothermal reaction pressure of 2 MPa，n（Ni）∶n（NaOH）=1∶（54~72），and hydrothermal reaction time of 12 h.In addition，the catalytic performance of the Ni-PSNTs catalyst for the methanation of carbon dioxide was investigated.The results showed that the Ni-PSNTs catalyst exhibited excellent catalytic performance and reaction stability for the methanation of carbon dioxide.After 72 h of reaction testing，the catalyst performance did not significantly decrease，nor did nickel nanoparticles agglomerate and sinter.

Key words: nickel phyllosilicate nanotubes, nickel catalysts, controllable synthesis, methanation, sintering

中图分类号:

O643.3

李通, 尹宏峰. 层状硅酸镍纳米管催化剂的可控制备及其催化性能研究[J]. 无机盐工业, 2023, 55(5): 128-136.

LI Tong, YIN Hongfeng. Study on controllable preparation of nickel phyllosilicate nanotubes catalysts and their catalytic performance[J]. Inorganic Chemicals Industry, 2023, 55(5): 128-136.

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