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Materials 2019, 12, 1968 Materials 2019, 12, x FOR PEER REVIEW Materials 2019, 12, x FOR PEER REVIEW 8 of 13 8 of 13 8 of 13 27 Figure 4.. 27A2A7 ll NMR spectra of the solid products after lithium recovery from LiAl-LDHs at varied Figure 4. Al NMR spectra of the solid products after lithium recovery from LiAl-LDHs at varied + initialLi+ c+concenttratiions(a)6..75g/L,(b)3.375g/L,(c)1.6875g/L. initial Li concentrations (a) 6.75 g/L, (b) 3.375 g/L, (c) 1.6875 g/L. As the thermal reaction proceeded, the binding energy of O 1s changed due to the conversion AsAtshtehethtehremrmalalrereaacctitoionnprroceeded,thebindiingeeneerrggyyooffOO1s1schcahnagnegdedudeuteottohethceoncovnervseiorsnionf of of solids from LiAl-LDHs to Al(OH) . The XPS O 1s spectra of the solid products after lithium sosliodlisdfsrofrmomLiLAiAl-lL-LDDHHsstotoAl(l(OH))33.. Th3e XPS O 1s speccttrraaoof fththeesosolildidprpordoudcutsctasftaefrtelirthliituhmiumrecroevceorvyery recovery (Figure 5) was divided into three peaks with binding energies of 533.2(O ), 531.8(O ), (Fi(gFuigruere5)5w) wasasddivividideeddinintototthrree peaks with biindiinggeenneergrgieisesofof5353.32.(2O(OW)W, )5,3513.81(.O8(aOdW),ada),ndan5d315.3a1d.3 anedV5(O31L).3[e33V](.OSin)c[e33t]h.eSOinwceinttheensOitywinatesngsrietyatwlyaasffgercetaedtlybayfftehcetedrybiyngthceodndryitiinogn,ciotnwdiltliono,titbweill eV(OL) [33]. SinLce the Ow intensityw was greatly affected by the drying condition, it will not be nodtibsceudssisecduhsseered.Cheorme.pCaroemdpwaitrhedLiwAilt-hLDLHiAs-l-1L(DFiHgusr-e1S(F2)ig,tuhreOSa2d)p,tehaekOintenpseitaykoifnttheensoitlyidopfrtohdeuscotlid discussed here. Compared with LiAl-LDHs-1 (Figure S2), the Oad peak iandtensity of the solid product proafdteurctlitahfituemrlirtehciouvmeryreicnocvrearsyedin,carnedastehde,OaLndpetahkeinOtenpseitaykdienctrenaseitdy,dwehcircehasmeeda,nwtthiacththmeemanetatlhat after lithium recovery increased, and the OL peak intLensity decreased, which meant that the metal thehymdertoaxlidheysdorroxthideehsyodrothxyelhgyrdouropxgyrlagdruoaullpyginracrdeuasaelldyaindcrtehaesemdeatanl–dotxhyegmene–tmale–toaxlybognend–gmraedtaulablloynd hydroxides or the hydroxyl group gradually increased and the metal–oxygen–metal bond gradually broke. This result is consistent with the process of forming Al(OH)3 from LiAl-LDHs. In Figure 5, the graduallybroke.ThisresultisconsistentwiththeprocessofformingAl(OH) fromLiAl-LDHs.In broke. This result is consistent with the process of forming Al(OH)3 from LiAl-L3 DHs. In Figure 5, the solid product after lithium recovery tends to form Al(OH)3 when the crystallinity degree of Figure5,thesolidproductafterlithiumrecoverytendstoformAl(OH) whenthecrystallinitydegree solid product after lithium recovery tends to form Al(OH)3 whe3n the crystallinity degree of LiAl-LDHs increased. of LiAl-LDHs increased. LiAl-LDHs increased. Figure 5. XPS O 1s spectra of the solid products after lithium recovery from LiAl-LDHs at varied initial Figure 5. XPS O 1s spectra of the solid products after lithium recovery from LiAl-LDHs at varied Li+ concen+trations (a) 6.75 g/L, (b) 3.375 g/L, (c) 1.6875 g/L. initial Li concentrations (a) 6.75 g/L, (b) 3.375 g/L, (c) 1.6875 g/L. Figure 5. XPS O 1s spectra of the solid products after lithium recovery from LiAl-LDHs at varied initial Li+ concentrations (a) 6.75 g/L, (b) 3.375 g/L, (c) 1.6875 g/L.PDF Image | Lithium Recovery Pre-Synthesized Chlorine-Ion-Intercalated
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