Quam sit tenuis charta oxydatum graphite et graphene praeparatio et characterisation?

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Portable Power Station supplementum

Tenuis charta-similis iacuit graphitae oxidized bene praeparata methodo Hummers mutationi, et scheda graphitica oxidationis parata sicut graphena nanomateria cum hydrazino redacta est. Synthesis productorum per Fourierianum spectroscopium infrarubrum (FT-IR), Raman Spectroscopium (RS), X-radii Diffractionis (XRD), Microscopium Electron (SEM), Transmittentes Electroractor (TEM), et Agency (AFM), etc. Structura et effectus sunt propria.

Nsonaazụ gosiri na ọkpụrụkpụ nke graphene bụ 0.36 nm, ọnụ ọgụgụ nke n&39;ígwé bụ 3. Na mgbakwunye, a kwadebere usoro mmeghachi omume nke usoro Hummers gbanwetụrụ site na usoro mmeghachi omume nke graphite dị mkpa dị ka oxidation, na usoro mmeghachi omume kemịkalụ na-eme n&39;oge oxidation nke graphite oxidation a na-enyocha.

N&39;afọ 2004, GEIM et al, kwadebere atọmịk kristal-graphene ọhụrụ nwere akụkụ abụọ nke SP2 mejupụtara carbon atomic layers site na iji usoro ịwepu igwe. Akụkụ bụ isi nke graphene bụ mgbanaka yuan isii benzene, nke bụ naanị 0.34 nm.

Ya mere, graphene nwere ọtụtụ ihe magburu onwe kemịkalụ anụ ahụ, dị ka 100 ugboro ike nke ígwè, ruo 130gPa, ụgbọ njem erute 15000 cm2 / (v · s), thermal conductivity bụ 5000W / (m · K). Na mgbakwunye, graphene nwekwara ihe pụrụ iche dị ka ụlọ okpomọkụ quantum Hall mmetụta na ụlọ okpomọkụ Njirimara ferromagnetic. Ka ọ dị ugbu a, usoro nkwadebe nke graphene bụ usoro ịwepu micro-mechanical, ntinye kemịkalụ kemịkalụ, usoro mbelata kemịkalụ redox, usoro uto epitaxial kristal na usoro ikpo ọkụ.

N&39;ime ha, usoro nkwụsị nke micromechanical nwere ike ịkwadebe graphene nke nha micron, mana njikwa ahụ dị ala, ọ na-esiri ike ịmepụta nnukwu mmepụta. Usoro uto nke kristal epitaxial na-adịkarị mfe nrụgharị n&39;ihi elu nke kristal SiC, nke mere na nnukwu ebe, ọkpụkpụ dị ka otu graphene. Usoro ntinye ego nke kemịkalụ (CVD) bụ mkpụrụ nwere otu kristal metal ma ọ bụ ihe nkiri igwe, nke nwere ike itolite akwa mpempe akwụkwọ graphene dị gịrịgịrị, mana ịdị ọcha graphene adịghị elu, enweghịkwa ike ịrụpụta nnukwu mmepụta.

Usoro ikpo ọkụ ihe mgbaze bụ n&39;ihi ọnọdụ siri ike dị ka okpomọkụ dị elu na nrụgide dị elu, na mmepụta ngwaahịa dị ala, ọ dịghịkwa ohere ịmepụta oke. Usoro mbelata redox kemịkalụ bụ ịkwadebe graphene site na mwepụ ultrasonic na mbelata usoro site na usoro Hummers. N&39;ihi obere usoro mmepụta nke usoro ahụ, uru nke mmepụta mmepụta ihe dị elu na-emetụta na ọmụmụ ihe.

N&39;oge usoro Hummers, a na-akwado graphite, gụnyere obere okpomọkụ (0 Celsius C), ọkara okpomọkụ (38 Celsius) na okpomọkụ dị elu (98 Celsius C), na onye na-ahụ maka oxidizing na-etinye uche H2SO4 na KMNO4. Site n&39;ọmụmụ nke usoro oxidation graphite, a na-agbanwe usoro Hummers, ya bụ, oge oge nke usoro mmeghachi omume okpomọkụ na-agbatị, ma kagbuo ọkwa mmeghachi omume okpomọkụ. Ịkagbu usoro mmeghachi omume nke ọnọdụ okpomọkụ dị elu, ọ bụghị nanị na-ezere ihe ize ndụ nke eruptism nke sulfuric acid kpatara n&39;oge mmeghachi omume okpomọkụ dị elu, ma na-ezere mmeghachi omume nke okpomọkụ na ọnọdụ okpomọkụ dị elu, na-ebelata ogo oxidation nke graphite.

Na tiori na nnwale, oyi akwa oxide oyi akwa nwere ike ịkwadebe n&39;okpuru ọnọdụ okpomọkụ dị ala na ọnọdụ nchekwa na kwụsiri ike. hydrate hydrate belatara graphite nkwadebe iji kwadebe graphene nanomaterials, ma mepụtakwa mkpa akwụkwọ dị mkpa dị ka oxide graphite na graphene. 1, nnwale 1.

1, graphite akụrụngwa akụrụngwa (granularity: 325 mesh, first-rich nanotechnology Co., Ltd.); sulfuric acid gbadoro anya (95% ~ 98%); potassium permanganate, sodium nitrate, hydrogenated (30%), hydrochloric acid, chlorination Barium, hydrate (80%), wdg.

na-enyocha. A naghị ekwupụta ọgwụ ndị a dị n&39;elu nke ọma, a na-azụkwa ha n&39;aka ụlọ ọrụ Shanghai Chemical Reagent nke China Pharmaceutical Group. A naghị edozi reagent niile dị n&39;elu ozugbo.

1.2, sample nkwadebe 1) Mkpa akwụkwọ dị ka oxide ink (GO) oyi akwa nkwadebe nke 230 mL (98%) lekwasịrị sulfuric acid na 1000 ml nke atọ flasks, n&39;okpuru okpomọkụ mgbe niile magnetik ike na ice mmiri bat, 5.0 gnano3 na 10.

0 g ngwakọta nke graphite, na-akpali akpali na ọkara ọsọ maka 30 min, nke mere na ọ na-agwakọta ya. 30GKMNO4 jiri nwayọọ nwayọọ tinye ya na ngwakọta, na-akpali na 0 Celsius C maka 2 h. A na-ebugharị efere atọ ahụ n&39;ime mmiri ịsa mmiri na-ekpo ọkụ mgbe niile nke edoziworo na okpomọkụ dị gburugburu 38 Celsius C, na-aga n&39;ihu maka awa 30, na mmeghachi omume okpomọkụ na-eme.

Mgbe okpomọkụ nke mmeghachi omume okpomọkụ nke ọkara gasịrị, a na-ebufe ngwakọta ahụ n&39;ime 2000 ml beaker, tinye ya na mmiri deionized na 1000 ml, na 200 ml (5%) H2O2 agbakwunyere, na mmiri mmiri mmeghachi omume ghọrọ agba ọla edo. A na-eme centrifugation na centrifuge dị elu, na ntụgharị ntụgharị bụ 4000 r / min, na-asa ya na 5% HCl nke a na-emebu tupu ya emee na mmiri deionized ruo mgbe achọpụtara sulfuric acid sulfuric acid na filtrate, na nkwusioru ahụ na-apụ n&39;ime efere na-ekpo ọkụ na-ekpo ọkụ. eserese. 2) The Mbelata nke graphene e chụgara na a 100 ml nke dapụtara graphite ink na 100 ml nke mmiri mmiri ngwọta na-enweta a agba aja aja-edo edo nkwusioru, na ultrasound ọnọdụ e chụsasịrị n&39;okpuru a atọ-ọnụ flask, kpụ ọkụ n&39;ọnụ na 90 Celsius C, ntapu 2 ml nke hydrated hydrate, ebe a The 24 N&39;ihi na ọtụtụ ugboro nzà na-nyocha n&39;okpuru ọnọdụ. methanol na mmiri, na graphene akpọnwụwo ihe karịrị 60 Celsius.

1.3, ule na njirimara XRD diffraction analysis site na iji Japanese Rigaku D / MAX-RB diffractometer (Cu target, Kα radieshon, λ = 0.154056 nm), nyocha nyocha 5 ° ~ 80 °; Nyocha infrared spectroscopy (FT-IR) ThermonicoLET&39;s NEXUS Fourier na-agbanwe ụdịdị ụdịdị dị iche iche nke infrared, mbadamba KBR, ogologo ogologo 400 ~ 4000cm-1; Raman spectroscopy (Raman) na-enyocha ụdị INVIA-ụdị microclassless laser Raman spectrometer nke British Renishaw, Usoro ndekọ sitere na 100 ruo 3200 cm-1, ogologo ikuku laser bụ 785 nm, mkpebi oghere bụ 1 μm n&39;akụkụ, ogologo na 1 μm; mikroskopu eletrọnịnụ (SEM) na-anakwere microscope eletrọn S-4800 FESEM; transmissive eletrọn microscope (TEM) adopts Japan JEO ụlọ ọrụ JEM-2100F-ụdị ubi na-ebunye elu-mkpebi nnyefe eletrọn microscope; Atomic Force scanning microscope (AFM) nakweere US Veeco&39;s Nanoscope4-ụdị atomic Force microscope.

Nchikota a. Site n&39;inyocha usoro oxidation nke usoro graphite oxidation, usoro Hummers gbanwere nke a kagburu ọkwa mmeghachi omume okpomọkụ dị elu, na graphene nwetara site na peeling ultrasound na ọgwụgwọ hydrate hydrate. B.

Nsonaazụ ule TEM na AFM na-egosi na ọkpụrụkpụ nke graphene bụ 0.36 nm, ọnụ ọgụgụ nke akwa bụ 3. c.

Usoro ahụ dị mma ma dị mfe, mmepụta dị ukwuu, dị mfe ịchịkwa, na-enye ngwa ngwa na dị mfe, nnukwu nkwadebe nke graphene dị mkpa nke akwụkwọ, na-enye ntọala maka ngwa azụmahịa nke graphene. .