Inorganic Chemicals Industry ›› 2025, Vol. 57 ›› Issue (9): 37-45.doi: 10.19964/j.issn.1006-4990.2024-0446

• Research & Development • Previous Articles     Next Articles

Study on preparation and performance of Ni-modified titanium-based lithium ion sieve

CHEN Mengmeng1,2(), XU Dekan2, HUANG Jilong2, TANG Zhilan2, ZHANG Xu1, TAN Chao2, WANG Xiaohu2, PENG Wenbo2()   

  1. 1. Xizang Jiuwu New Material Technology Co. ,Ltd. ,Haixi Mongolian Tibetan Autonomous Prefecture 817000,China
    2. Jiangsu Jiuwu High-tech Co. ,Ltd. ,Nanjing 210000,China
  • Received:2024-08-13 Online:2025-09-10 Published:2024-10-18
  • Contact: PENG Wenbo E-mail:cmmngd@163.com;pengwenbo@jiuwu.com

Abstract:

In order to solve the problem of poor cycling performance caused by the dissolution loss of titanium-based lithium ion sieves(H2TiO3) during periodic cycling,it was aimed to improve the stability by changing the lattice structure with metal ion doping.The Ni-modified titanium-based lithium ion sieve(Ni-HTO) was prepared by utilizing ball milling for mixing,followed by high-temperature solid-state reaction and ion exchange.The effects of nickel doping on the structure,adsorption performance,and stability of the adsorbent were investigated,and its applicability in lithium extraction from salt lakes was assessed to provide insights for practical applications.The results showed that the dissolution of Ti4+ in the metatitanic acid ion sieve was reduced after Ni doping.Furthermore,the(002) interplanar spacing of the Ni-modified ion sieve was decreased,which significantly improved the adsorption selectivity for Li+.Specifically,the separation factor of Li+ to Mg2+ reached 281.23,with a saturated adsorption capacity of 30.5 mg/g.The granulated adsorbent(Ni-HTO) was used in the lithium extraction test of Laguocuo Salt Lake brine.The results showed that the adsorption capacity for Li+ remained around 9.55 g/L,the average Ti4+ dissolution loss rate was decreased from 0.68%(unmodified) to 0.20%,and the average selectivity was significantly improved after 20 cycles,which indicated that Ni-HTO had excellent adsorption properties,cyclic stability and selectivity.In summary,the Ni-modified titanium-based lithium ion sieve had great application potential in the field of lithium extraction from salt lakes.

Key words: adsorbent, titanium-based lithium ion sieve, doping, stability, salt lake brine

CLC Number: