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iScience ll Article Figure 5. Surface Valence Analysis of LMO Nanotubes XPS results of (A) Mn 2p1/2 and Mn 2p3/2 spectra and (B) deconvoluted profile of specific Mn 2p3/2 spectra for pristine LMO, H2SO4-eluted, and (NH4)2S2O8-eluted LMO nanotubes, respectively Limitations of the Study Here, we proposed single-crystalline LMO nanotubes, synthesized by a template-engaged method, for lithium extractions. The degradation of LMO nanotubes has been overcome using (NH4)2S2O8 as the eluent, which reduced manganese dissolutions and improved capacity retention upon adsorption/desorp- tion processes. The marriage of LMO nanotubes and (NH4)2S2O8 allows $89.73% theoretical capacity of the sorbent in pure LiCl solutions. However, for lithium recovery from real brines, efficiency and adsorption behavior need to be optimized according to in-service conditions. For those containing highly concen- trated Na+ and Mg2+, recovery practices should be integrated with pre-treatments, such as filtration, evap- oration, and participation. Resource Availability Lead Contact Further information and requests for resources should be directed to the Lead Contact, Kaiyuan Shi (shiky7@mail.sysu.edu.cn). Materials Availability The materials that support the findings of this study are available from the corresponding author upon reasonable request. Data and Code Availability This study did not generate/analyze data sets/code. METHODS All methods can be found in the accompanying Transparent Methods supplemental file. SUPPLEMENTAL INFORMATION Supplemental Information can be found online at https://doi.org/10.1016/j.isci.2020.101768. ACKNOWLEDGMENTS K.S. is thankful for the Research Start-up Funds from Sun Yat-sen University (29000-18841231). J.Y. acknowl- edges support from the Fundamental Research Funds for the Central Universities (20lgpy77) and Guang- dong Basic & Applied Basic Research Foundation (No. 2019A1515110436). Z.X. is grateful for the funding from the Education Department of Guangdong Province (2018KQNCX059) and Guangdong Basic & Applied Basic Research Foundation (No. 2020A1515011549). The authors would like to thank R. Niu from the Shiyanjia Lab (www.shiyanjia.com) for XPS tests. OPEN ACCESS iScience 23, 101768, November 20, 2020 7PDF Image | Extraction of Lithium from Single-Crystalline Lithium
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Product and Development Focus for Infinity Turbine
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