Abstract

Single-phase nanotubular hydrosilicates (Mg_{1 – x}Co_x)₃Si₂O₅(OH)₄ (x = 0.2, 0.4, …, 1) with a chrysotile structure were obtained by hydrothermal treatment at 200°C. Materials based on cobalt-containing hydrosilicates can be used as catalysts, sorbents, and sensors and in energy storage and accumulation devices. Nanotubular cobalt-containing hydrosilicates are difficult to produce because of the presence of oxygen in the system and, as a consequence, the oxidation of cobalt to Co³⁺. To stabilize Co²⁺, at the stage of hydrothermal treatment, a sodium sulfite solution was used to chemically remove oxygen from the system. The samples obtained were nanoscrolls of various morphologies. An increase in the cobalt content in the system led to the formation of multi-walled and double-walled cylinders, cones, tube-in-tube nanoscrolls, and also nanoscrolls with fully or partially closed ends, curved nanoscrolls, and spheroidal particles.

中文翻译：

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在 Na2SO3 溶液中水热合成氢硅酸盐纳米卷 (Mg1 – xCox)3Si2O5(OH)4

摘要

通过在 200°C 下水热处理获得具有温石棉结构的单相纳米管状水硅酸盐 (Mg _{1 – x} Co _x ) ₃ Si ₂ O ₅ (OH) ₄ ( x = 0.2, 0.4, ..., 1)。基于含钴氢硅酸盐的材料可用作催化剂、吸附剂和传感器，以及用于能量存储和积累装置。纳米管状的含钴水合硅酸盐很难生产，因为系统中存在氧，因此钴会氧化成 Co ³⁺。稳定Co ²⁺，在水热处理阶段，亚硫酸钠溶液用于化学去除系统中的氧气。获得的样品是各种形态的纳米卷。系统中钴含量的增加导致形成多壁和双壁圆柱体、锥体、管中管纳米卷，以及具有完全或部分封闭端的纳米卷、弯曲纳米卷和球形颗粒。