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首页> 外文期刊>RSC Advances >A novel study on preparation of H2TiO3–lithium adsorbent with titanyl sulfate as titanium source by inorganic precipitation–peptization method
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A novel study on preparation of H2TiO3–lithium adsorbent with titanyl sulfate as titanium source by inorganic precipitation–peptization method

机译：硫酸氧钛为钛源制备H 2 TiO 3 -锂吸附剂的新研究

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摘要

A peroxy lithium titanate sol was prepared with low-cost and easily available titanyl sulfate as the titanium source, lithium acetate as the lithium source, and aquae hydrogenii dioxidi as the complexing agent using an inorganic precipitation–peptization method. The sol system was aged, centrifugal-washed, dried and calcined to obtain a pure precursor, Li2TiO3, followed by pickling with hydrochloric acid to obtain the H2TiO3–lithium adsorbent. The effects of aging time and calcination temperature on the target product were investigated. The results indicate that the sol-system is stable, which is beneficial for loading on a suitable carrier, such as ceramic foams. Centrifugal-washing, instead of vacuum filtration-washing, is conducive to product formation. The most suitable aging time of precursor sol is 24 h and the appropriate calcination temperature is 750 °C. The lithium drawn-out ratio of samples synthesized in this condition reaches 89.50% after pickling with 0.2 M hydrochloric acid for 8 h at 70 °C. Moreover, the Li+ uptake of the adsorbent (adsorption capacity) reaches 29.96 mg g?1 and 33.35 mg g?1 when the adsorption time is 1 h and 8 h, respectively.
机译：使用无机沉淀-胶溶法，以低成本和易得的钛氧基硫酸盐为钛源，醋酸锂为锂源，氢氧化氢二乙酯为络合剂，制备了过氧钛酸锂溶胶。对溶胶体系进行时效，离心洗涤，干燥和煅烧，以获得纯的前体Li 2 TiO 3 ，然后用盐酸酸洗，获得H 2 TiO 3 –锂吸附剂。研究了老化时间和煅烧温度对目标产物的影响。结果表明该溶胶体系是稳定的，这有利于负载在合适的载体例如陶瓷泡沫上。离心洗涤而不是真空过滤洗涤有利于产物的形成。前体溶胶最合适的老化时间是24小时，合适的煅烧温度是750°C。在70°C下用0.2 M盐酸酸洗8 h后，在此条件下合成的样品中锂的抽出率达到89.50％。此外，吸附剂的Li + 吸收量（吸附容量）分别为29.96 mg g ？1 和33.35 mg吸附时间分别为1 h和8 h时，g ？1 。

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