吸附法是目前从低锂浓度的盐湖卤水中提取锂的最有前途的方法.采用EDTA-柠檬酸络合法制备了Li4Mn5O12前驱体,经酸浸脱锂后得到对Li+具有特殊选择性的锰氧化物锂离子筛.通过热重、XRD、SEM、FT-IR、化学组成、吸附动力学及共存金属离子的分配系数等手段对样品的晶相结构和Li+选择性吸附性能进行了研究.结果表明:煅烧时间对Li4Mn5O12前驱体生成有较大影响,由400℃煅烧24 h所得的前驱体几乎为纯相的Li4Mn5O12化合物,经酸浸脱锂后的离子筛仍保持着与前驱体相同的尖晶石结构；前驱体Li4Mn5O12和离子筛MnO2均为200 nm左右的球状颗粒；离子筛的最大吸附容量为43.1 mg/g,并具有较好的Li+选择性.
参考文献
| [1] | ZHONG Hui.Property of H2TiO3 type ion exchangers and extraction of lithium from brine of natural gas wells.Chinese Journal of Applied Chemistry,2000,17(3):307-309. |
| [2] | Tsuchiya S,Nakatani Y,Lbrahim R,et al.Highly efficient separation of lithium chloride from seawater.J.Am.Chem.Soc.,2002,124:4936-4937. |
| [3] | Chung K S,Lee J C,Kim W K,et al.Inorganic adsorbent containing polymeric membrane reservoir for the recovery of lithium from seawater.Journal of Membrane Science,2008,325(2):503-508. |
| [4] | DONG Dian-quan,ZHANG Feng-bao,ZHANG Guo-liang,et al.Synthesis of Li4Ti5O12 and its exchange kinetics with Li+.Acta Physico-Chimica Sinica,2007,23(6):950-954. |
| [5] | LIU Luo-Feng,ZHANG Yu-Shang,HUANG Xi-Ping,et al.Synthesis and application of efficient adsorbent for lithium extraction from seawater and brines.Chemical Industry and Engineering,2010,27(2):138-143. |
| [6] | WANG Lu,MA Wei,HANG Mei,et al.Soft chemical synthesis and adsorption properties of MnO2·0.5H2O,a high performance ion sieve for lithium.Acta Chimica Sinica,2007,65(12):1135-1139. |
| [7] | Chitrakar R,Kanoh H,Miyai Y,et al.Recovery of lithium from seawater using manganese oxide adsorbent(H1.6Mn1.6O4)derived from Li1.6Mn1.6O4.Ind.Eng.Chem.Res.,2001,40(9):2054-2058. |
| [8] | Zhang Q H,Li S P,Sun S Y,et al.Lithium selective adsorption on low-dimensional titania nanoribbons.Chemical Engineering Science,2010,65(1):169-173. |
| [9] | (O)zgür C.Preparation and characterization of LiMn2O4 ion-sieve with high Li+ adsorption rate by ultrasonic spray pyrolysis.Solid State Ionics,2010,181:1425-1428. |
| [10] | Zheng J P,Crain D J,Roy D.Kinetic aspects of Li intercalation in mechano-chemically processed cathode materials for lithium ion batteries:Electrochemical characterization of ball-milled LiMn2O4.Solid State Ionics,2011,196(1):48-58. |
| [11] | Ma L W,Chen B Z,Chen Y,et al.Preparation,characterization and adsorptive properties of foam-type lithium adsorbent.Microporous and Mesoporous Materials,2011,142(1):147-153. |
| [12] | Sun S Y,Song X F,Zhang Q H,et al.Lithium extraction/insertion process on cubic Li-Mn-O precursors with different Li/Mn ratio and morphology.Adsorption,2011,17(5):881-887. |
| [13] | Yang X J,Kanoh H,Tang W P,et al.Synthesis of Li1.33Mn1.67O4spinels with different morphologies and their ion adsorptivities after delithiation.Journal of Materials Chemistry,2000,10(8):1903-1909. |
| [14] | Yang X J,Tang W P,Kanoh H,et al.Synthesis of lithium manganese oxide in different lithium-containing fluxes.Journal of Materials Chemistry,1999,9(10):2683-2690. |
| [15] | Takada T,Hayakawa H,Akiba E.Preparation and crystal structure refinement of Li4Mn5O12 by the rietveld method.Journal of Solid State Chemistry,1995,115(2):420-426. |
| [16] | SUN Shu-Ying,ZHANG Qin-Hui,YU Jian-Guo.Preparation and lithium adsorption properties of low-dimensional cubic Li4Mn5O12nanostructure.Journal of Inorganic Materials,2010,25(6):626-629. |
| [17] | Li Y M,Makita Y,Lin Z Z,et al.Synthesis and characterization of lithium manganese oxides with core-shell Li4Mn5O12@Li2MnO3structure as lithium battery electrode materials.Solid State Ionics,2011,196(1):34-40. |
| [18] | LI Shu-Jun,GE Lin,ZHEN Yi-Feng,et al.Properties of (Ce0.8Y0.2-xNdxO1.9)0.99(ZnO)0.01 Electrolyte Prepared by EDTA-citrate Complexing Method.Journal of Inorganic Materials,2012,27(3):265-270. |
| [19] | CHEN Yong-Xi,ZHOU Li-Juan,GUO Li-Pin.The research on the determination of average Mn valency in lithium manganese oxide.Journal of Wuhan University of Technology,2001,23(10):1-3. |
| [20] | Wang L,Ma W,Liu R,et al.Correlation between Li+ adsorption capacity and the preparation conditions of spinel lithium manganese precursor.Solid State Ionics,2006,177(17/18):1421-1427. |
| [21] | MA Li-Wen,CHEN Bai-Zhen,SHI Xi-Chang,et al.Preparation and Li+ extraction/adsorption properties of lithium-rich manganese oxide in aqueous solution.Chinese Journal of Inorganic Chemistry,2011,27(4):697-703. |
| [22] | Ammundsen B,Aitchison P,Burns G R,et al.Proton insertion and lithium-proton exchange in spinel lithium manganates.Solid State Ionics,1997,97(1-4):269-276. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%