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Nanomaterials 2020, 10, 376 Nanomaterials 2020, 10, x FOR PEER REVIEW Figure 3. (a) Raman spectra and (b) XRD patterns of GO and the GO–AgNP nanohybrid. Figure 3. (a) Raman spectra and (b) XRD patterns of GO and the GO–AgNP nanohybrid. −1 −1 rreepprreesseenntstsththeeEE22ggmooddeewitihthininaarorommataitcicacrabrbononrirningsg,sa, nanddththe eDDbbanandd(1(3153353cmcm ))dueettottheiin--pllanee ccaarrbon rriing bbrreeaatthhiing moodee, , whhiicch isisaacctitviveewhheennddeefefecctstsaarereppreresesennt.t. IIn aaddiittiion,, sseeveerrall bbaandss −1 −1 aatttaacchmentt off AgNPs tto tthe GO ssurrffacce lleed tto ttheesshhiiffttooffbbootthhbbaannddssttoololoweerrwaavveennumbeerrss,, tto aa moorreeinintteennsseeDbbaanndd,,aannddtotoaannininccrereaaseseininththeeIID//IIG iintensiityrattiio,,iindiicattiingtthefforrmattiionoffmorree DG 2 ssp p 2 d do om ma ai in ns s w wi it th h s sm ma al ll le er r a av ve er ra ag ge e s si iz ze e a as s a a c co on ns se eq qu ue en nc ce e o of f t th he e p pa ar rt ti ia al l r re ed du uc ct ti io on n o of f G GO O.. IIn n a ad dd diittiio on n,, aanininccrreeaasseeininththeeRRaamaannssccaattteerrininggwaassoobbsseerrvveedaanndisisaassccrribibeeddtotoththeessuurrfafaccee-e-ennhhaanncceedRaamaan ssccaattteerriningg(S(SEERRSS))eefffefcetctofoAf Aggnannaonpoapratirctlieclsetshtahtarterseuslutsltfsrofmromthethinetienntseensloeclaolcealeeclteroctmroamgnaegtnicetfiieclfdiselodfs Aogf Anagnnoapnaorptiaclretisc[le3s7][.37]. TTabablele2.2.RRaammaannshshifitftppoosistitoionnssaannddinintetnensistiytyrartaitoio(I(ID/I/IG))offGOandGO–AgNPss.. DG Theessppeeccttrraaooffbbooththssaampplelessddisispplalayyeeddtwtwoochchaararaccteterrisistitcicbbaannddss, ,ththeeGGbbanandd(1(5195898cmcm ))tthhaatt −1 −1 weerreepprreesseennttininththeesseeccoonnddrereggioionnfrforomm2225500toto3430400cmcm ..TheRamandattaarelliissttediinTaabblele22..Thee XRD Analysis XRD Analysis Material D (cm−1) G 2D 2G The crystalline nature of the synthesized GO and GO–AgNP nanohybrid was analyzed by XRD ◦ pdaitftferrancstioshnofworsmsturolan,gthBeradggspreaflciencgtionfsGaOt 3i8s.30.,7494.n2m,.6R4.e5ga, r7d7i.n3g, aGnOd–8A1g.7No oPfs,2θth,ewXh-icrahycodrirfefrsapcotniodn tpoatthter(n1s11sh),o(w20s0s)t,r(o2n2g0)B,(r3a1g1g),raenfldec(t2io2n2s)carty3s8ta.3l°p,4la4n.2e°s,,6r4e.s5p°e,c7t7iv.3e°l,ya,nodft8h1e.7foacoef-2cθe,nwtrehdichcucboircrecrsypsotnadl storutchteu(r1e1o1f),A(g20N0P),s.(2T2h0e),se(3r1e1s)u,latsndco(r2r2o2b)ocrraytesttahlepfloarnmesa,tiroenspoefcAtivgeNlyP,soofnththeefaGcOe-cseunrtfraecde.cIunbaicddcrityisotna,l tshteruncotnu-raepopfeAargaNncPes.oTfhtheeseGrOesudilfftsrcaoctrironbopreatkeathfterfothrme attioacnhomfeAngtNofPAs ognNtPhseoGnOtosiutsrfsaucrefa. Icne asudgdgiteisotns, ttheeexnfonli-atpiopneaorfaGncOe–oAfgtNhPe sGhOeetds.iffraction peak after the attachment of AgNPs onto its surface suggests the exfoliation of GO–AgNP sheets. TEM TEM (FigurTeh3ebc).ryTshtaelpliantetenrantuofreGoOf tdhiespslyanytshtehseiz(e0d01G) OdiffanradctGioOn–pAegaNk aPtn2aθn=oh1y1b.1rid; awccaosrdaninaglytzoetdhebyBrXaRggD d(Fiffigraucrteio3nb)f.oTrhmeuplat,ttehrne odfsGpOacidnigspolafyGsOtheis(00.719) dnimff.raRcteiognarpdeinakgaGtO2θ–A= 1g1N.1P°s;,atchceorXd-irnagytoditffhreaBctriaogng ◦◦◦◦ The morphology of the synthesized GO–AgNP nanohybrids was investigated by TEM. Figure 4 shows TEM images, selected area electron diffraction (SAED) patterns of GO–AgNP nanohybrids, and The morphology of the synthesized GO–AgNP nanohybrids was investigated by TEM. Figure 4 particle size distributions of AgNPs on GO sheets. The micrographs confirm the decoration of GO with shows TEM images, selected area electron diffraction (SAED) patterns of GO–AgNP nanohybrids, AgNPs. For all samples, spherical AgNPs well dispersed throughout the GO surface were observed. and particle size distributions of AgNPs on GO sheets. The micrographs confirm the decoration of For each sample, 1200 nanoparticles in several GO–AgNP micrographs were analyzed to determine GO with AgNPs. For all samples, spherical AgNPs well dispersed throughout the GO surface were the AgNP sizes. observed. For each sample, 1200 nanoparticles in several GO–AgNP micrographs were analyzed to determine the AgNP sizes. 8 of 22 8 of 22 Material D (cm−1 ) G 2D D+G D+G (cm−1 ) (cm−1) 2944 2G I /I ID/IDG G 0.83±0.02 GO GO–AgNPs-A 1353 (cm−1 ) (cm−1) 1598 (cm−1 ) (cm−1) 2741 (cm−1 ) (cm−1) 3181 GO GO–AgNPs-A 1353 1598 2741 2944 3181 0.83±0.02 1345 1594 2712 2934 3176 1.03±0.01 1.03±0.01 1345 1594 2712 2934 3176PDF Image | Graphene Oxide–Silver Nanoparticle Nanohybrids
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