1. Nkwadebe mkpuchi
Iji mee ka nnwale electrochemical dị mfe, a na-ahọrọ 30mm × 4 mm 304 ígwè anaghị agba nchara dị ka ntọala. Jiri akwụkwọ sandpaper hichaa ma wepụ ihe fọdụrụ n'ime oyi akwa oxide na ntụpọ nchara n'elu ihe mkpuchi ahụ, tinye ha n'ime beaker nwere acetone, jiri bg-06c ultrasonic cleaner nke ụlọ ọrụ eletrọniki Bangjie gwọọ ntụpọ ndị dị n'elu ihe mkpuchi ahụ maka nkeji iri abụọ, wepụ ihe ndị mebiri emebi n'elu ihe mkpuchi ígwè ahụ na mmanya na mmiri a gwakọtara agwakọta, ma jiri ihe na-afụ ọkụ kpoo ha. Mgbe ahụ, a kwadebere alumina (Al2O3), graphene na hybrid carbon nanotube (mwnt-coohsdbs) n'ogo (100: 0: 0, 99.8: 0.2: 0, 99.8: 0: 0.2, 99.6: 0.2: 0.2), ma tinye ya n'ime igwe na-agba bọọlụ (qm-3sp2 nke ụlọ ọrụ ngwa egwu Nanjing NANDA) maka igwe na-agba bọọlụ na ịgwakọta. A haziri ọsọ ntụgharị nke igwe ihe eji egwu bọọlụ gaa na 220 R / min, a tụgharịrị igwe ihe eji egwu bọọlụ gaa na
Mgbe e gwechara bọọlụ, tọọ ọsọ ntụgharị nke tankị igwe bọọlụ ka ọ bụrụ 1/2 n'otu oge mgbe e mechara igwe bọọlụ ahụ, ma tọọ ọsọ ntụgharị nke tankị igwe bọọlụ ka ọ bụrụ 1/2 n'otu oge mgbe e mechara igwe bọọlụ ahụ. A na-agwakọta ngwakọta seramiiki na ihe njikọ ahụ nke a gwechara bọọlụ ahụ nke ọma dịka akụkụ nke 1.0 ∶ 0.8 si dị. N'ikpeazụ, e nwetara mkpuchi seramiiki a gwechara agwakọta site na usoro ịgwọ.
2. Nnwale ire ere
N'ọmụmụ ihe a, ule nchara electrochemical na-anabata ebe ọrụ eletriki Shanghai Chenhua chi660e, ule ahụ na-anabatakwa usoro nnwale electrode atọ. Elektrọd platinum bụ elektrọd enyemaka, elektrọd ọlaọcha chloride bụ elektrọd ntụaka, ihe nlele a kpuchiri ekpuchi bụ elektrọd na-arụ ọrụ, nwere mpaghara mkpughe dị irè nke 1cm2. Jikọọ elektrọd ntụaka, elektrọd na-arụ ọrụ na elektrọd enyemaka na sel electrolytic na ngwa ahụ, dịka egosiri na Foto 1 na 2. Tupu ule ahụ, mikpuo ihe nlele ahụ na elektrọd, nke bụ 3.5% ngwọta NaCl.
3. Nyocha Tafel nke ire ere electrochemical nke mkpuchi
Foto nke 3 na-egosi usoro Tafel nke ihe mkpuchi a na-ekpuchighị ekpuchi na mkpuchi seramiiki nke ejiri ihe mgbakwunye nano dị iche iche kpuchie mgbe ọ gbasịrị electrochemical ruo awa 19. E gosiri data voltaji corrosion, njupụta ugbu a corrosion na ule impedance eletriki enwetara site na ule corrosion electrochemical na Tebụl 1.
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Mgbe njupụta nke ugbu a nke nchara pere mpe ma arụmọrụ nke iguzogide nchara dị elu, mmetụta nke iguzogide nchara nke mkpuchi ahụ ka mma. A pụrụ ịhụ site na Foto nke 3 na tebụl 1 na mgbe oge nchara bụ awa 19, voltaji kachasị nke matriks ígwè efu bụ -0.680 V, njupụta nke ugbu a nke matriks bụkwa nke kachasị ukwuu, na-eru 2.890 × 10-6 A/cm2. Mgbe e ji mkpuchi seramiiki alumina dị ọcha kpuchie ya, njupụta ugbu a nke nchara belatara ruo 78% na PE bụ 22.01%. Ọ na-egosi na mkpuchi seramiiki na-arụ ọrụ nchebe ka mma ma nwee ike imeziwanye nguzogide nchara nke mkpuchi ahụ na electrolyte na-anọpụ iche.
Mgbe etinyere 0.2% mwnt-cooh-sdbs ma ọ bụ 0.2% graphene na mkpuchi ahụ, njupụta nke ugbu a nke nchara belatara, nguzogide ahụ mụbara, a mekwara ka iguzogide nchara nke mkpuchi ahụ ka mma, ya na PE nke 38.48% na 40.10% n'otu n'otu. Mgbe ejiri 0.2% mwnt-cooh-sdbs na 0.2% graphene agwakọta mkpuchi alumina, a na-ebelatakwa ugbu a nke nchara site na 2.890 × 10-6 A / cm2 gbadaa ruo 1.536 × 10-6 A / cm2, uru iguzogide kachasị elu, mụbara site na 11388 Ω ruo 28079 Ω, PE nke mkpuchi ahụ nwekwara ike iru 46.85%. Ọ na-egosi na ngwaahịa a kwadebere nwere ezigbo nguzogide nchara, mmetụta synergistic nke nanotubes carbon na graphene nwere ike imeziwanye nguzogide nchara nke mkpuchi seramiiki nke ọma.
4. Mmetụta nke oge ịmịkọrọ na mgbochi mkpuchi
Iji chọpụtakwuo ihe mgbochi nchara nke mkpuchi ahụ, na-atụle mmetụta nke oge imikpu nke ihe nlele ahụ na electrolyte na ule ahụ, a na-enweta usoro mgbanwe nke iguzogide mkpuchi anọ ahụ n'oge imikpu dị iche iche, dịka egosiri na Foto 4.
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N'oge mbụ nke imikpu (awa 10), n'ihi njupụta na nhazi nke mkpuchi ahụ, ọ na-esiri ike imikpu electrolyte n'ime mkpuchi ahụ. N'oge a, mkpuchi seramiiki na-egosi nnukwu iguzogide. Mgbe ọ mikpuchara ruo oge ụfọdụ, nguzogide ahụ na-ebelata nke ukwuu, n'ihi na ka oge na-aga, electrolyte ahụ na-etolite ọwa nchara site na oghere na mgbawa dị na mkpuchi ahụ wee banye n'ime matrix ahụ, na-ebute mbelata dị ukwuu na nguzogide nke mkpuchi ahụ.
N'ọkwa nke abụọ, mgbe ngwaahịa nchara na-abawanye ruo n'ókè ụfọdụ, a na-egbochi mgbasa ahụ ma na-egbochi oghere ahụ nwayọ nwayọ. N'otu oge ahụ, mgbe electrolyte na-abanye n'ime njikọ njikọ nke oyi akwa / matrix ala njikọ, molekul mmiri ga-emeghachi omume na ihe Fe dị na matrix na njikọ mkpuchi / matrix iji mepụta ihe nkiri oxide metal dị gịrịgịrị, nke na-egbochi ịbanye na electrolyte n'ime matrix ma na-eme ka uru iguzogide dịkwuo elu. Mgbe matrix metal gba ọtọ mebiri emebi site na electrochemical, ọtụtụ mmiri ozuzo na-acha akwụkwọ ndụ akwụkwọ ndụ na-emepụta na ala nke electrolyte. Ngwọta electrolytic agbanweghị agba mgbe ọ na-eme ka ihe nlele a kpuchiri ekpuchi dị na electrolyze, nke nwere ike igosi na mmeghachi omume kemịkalụ dị n'elu dị adị.
N'ihi obere oge mmiri na nnukwu ihe ndị metụtara mpụga, iji nweta mmekọrịta mgbanwe ziri ezi nke paramita electrochemical, a na-enyocha usoro Tafel nke awa 19 na awa 19.5. Egosiri njupụta ugbu a nke nchara na nguzogide nke ngwanrọ nyocha zsimpwin nwetara na Tebụl 2. A pụrụ ịchọpụta na mgbe a mikpuru ya ruo awa 19, ma e jiri ya tụnyere ihe ndị gba ọtọ, njupụta ugbu a nke nchara nke mkpuchi alumina dị ọcha na alumina nke nwere ihe mgbakwunye nano dị obere ma uru nguzogide ya buru ibu. Uru nguzogide nke mkpuchi seramiiki nke nwere nanotubes carbon na mkpuchi nwere graphene fọrọ nke nta ka ọ bụrụ otu, ebe nhazi mkpuchi nwere nanotubes carbon na ihe mejupụtara graphene na-eme ka ọ dịkwuo mma nke ukwuu. Nke a bụ n'ihi na mmetụta synergistic nke nanotubes carbon otu akụkụ na graphene abụọ na-eme ka nguzogide nchara nke ihe ahụ dịkwuo mma.
Ka oge imikpu mmiri na-abawanye (awa 19.5), nguzogide nke ihe mkpuchi ala gba ọtọ na-abawanye, na-egosi na ọ nọ n'ọkwa nke abụọ nke nchara na-emebi emebi ma na-emepụta ihe nkiri oxide metal n'elu ihe mkpuchi ala. N'otu aka ahụ, ka oge na-abawanye, nguzogide nke ihe mkpuchi seramiiki alumina dị ọcha na-abawanyekwa, na-egosi na n'oge a, ọ bụ ezie na enwere mmetụta na-ebelata nke mkpuchi seramiiki, electrolyte abanyela na njikọ njikọ nke mkpuchi / matrix, ma mepụta ihe nkiri oxide site na mmeghachi omume kemịkalụ.
Ma e jiri ya tụnyere mkpuchi alumina nke nwere 0.2% mwnt-cooh-sdbs, mkpuchi alumina nke nwere 0.2% graphene na mkpuchi alumina nke nwere 0.2% mwnt-cooh-sdbs na 0.2% graphene, nguzogide mkpuchi ahụ belatara nke ukwuu ka oge na-aga, belatara site na 22.94%, 25.60% na 9.61% n'otu n'otu, na-egosi na electrolyte ahụ abanyeghị n'ime nkwonkwo dị n'etiti mkpuchi ahụ na substrate n'oge a. Nke a bụ n'ihi na nhazi nke nanotubes carbon na graphene na-egbochi ịbanye n'ime electrolyte, si otú a na-echebe matrix ahụ. A na-enyochakwa mmetụta synergistic nke abụọ ahụ. Mkpuchi ahụ nwere ihe nano abụọ nwere nguzogide nchara ka mma.
Site na usoro Tafel na mgbanwe nke uru mgbochi eletriki, achọpụtara na mkpuchi seramiiki alumina nwere graphene, nanotubes carbon na ngwakọta ha nwere ike ime ka iguzogide nchara nke matrix metal ka mma, mmetụta synergistic nke ha abụọ nwekwara ike ime ka iguzogide nchara nke mkpuchi seramiiki gluu dịkwuo mma. Iji chọpụtakwuo mmetụta nke ihe mgbakwunye nano na iguzogide nchara nke mkpuchi ahụ, a hụrụ ọdịdị elu micro nke mkpuchi ahụ mgbe ọ gbasịrị nchara.
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Foto nke 5 (A1, A2, B1, B2) na-egosi ọdịdị elu nke ígwè anaghị agba nchara 304 a kpughepụrụ ekpughere na seramiiki alumina dị ọcha a kpuchiri ekpuchi na mmụba dị iche iche mgbe ọ gbasasịrị. Foto nke 5 (A2) na-egosi na elu mgbe ọ gbasasịrị aghọọ ihe siri ike. Maka ihe ndị gba ọtọ, ọtụtụ nnukwu olulu nchara na-apụta n'elu mgbe e mikpuru na electrolyte, na-egosi na nguzogide nchara nke matrix ígwè gba ọtọ adịghị mma na electrolyte dị mfe ịbanye n'ime matrix. Maka mkpuchi seramiiki alumina dị ọcha, dịka egosiri na Foto nke 5 (B2), ọ bụ ezie na a na-emepụta ọwa nchara porous mgbe ọ gbasasịrị, nhazi dị oke njọ na nguzogide nchara dị mma nke mkpuchi seramiiki alumina dị ọcha na-egbochi mwakpo nke electrolyte nke ọma, nke na-akọwa ihe kpatara mmezi dị irè nke mgbochi nke mkpuchi seramiiki alumina.
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Ọdịdị elu nke mwnt-cooh-sdbs, mkpuchi nwere 0.2% graphene na mkpuchi nwere 0.2% mwnt-cooh-sdbs na 0.2% graphene. A pụrụ ịhụ na mkpuchi abụọ nwere graphene na Foto 6 (B2 na C2) nwere nhazi dị larịị, njikọ dị n'etiti ihe mkpuchi ahụ siri ike, a na-ekekọtakwa ihe ndị ahụ site na gluu. Ọ bụ ezie na elu ahụ na-emebi site na electrolyte, obere ọwa oghere na-etolite. Mgbe nchara gasịrị, elu mkpuchi ahụ dị oke ma enwere obere nhazi ntụpọ. Maka Foto 6 (A1, A2), n'ihi njirimara nke mwnt-cooh-sdbs, mkpuchi tupu nchara bụ nhazi porous nke kesara n'otu aka ahụ. Mgbe nchara gasịrị, pores nke akụkụ mbụ ahụ na-aghọ warara ma dị ogologo, ọwa ahụ na-adịkwa omimi. Ma e jiri ya tụnyere Foto 6 (B2, C2), nhazi ahụ nwere ntụpọ karịa, nke kwekọrọ na nkesa nha nke uru mgbochi mkpuchi nke enwetara site na ule corrosion electrochemical. Ọ na-egosi na mkpuchi seramiiki alumina nke nwere graphene, ọkachasị ngwakọta nke graphene na carbon nanotube, nwere ike iguzogide nchara kachasị mma. Nke a bụ n'ihi na nhazi nke carbon nanotube na graphene nwere ike igbochi mgbasa mgbawa nke ọma ma chebe matrix ahụ.
5. Mkparịta ụka na nchịkọta
Site na ule nguzogide nchara nke nanotubes carbon na ihe mgbakwunye graphene na mkpuchi seramiiki alumina na nyocha nke microstructure elu nke mkpuchi ahụ, a na-eme nkwubi okwu ndị a:
(1) Mgbe oge nchara ahụ dị awa iri na itoolu, na-agbakwunye 0.2% nke carbon nanotube ngwakọta + 0.2% graphene ngwakọta ihe mkpuchi seramiiki alumina, njupụta nke ikuku nchara mụbara site na 2.890 × 10-6 A / cm2 gbadaa ruo 1.536 × 10-6 A / cm2, a na-amụba ike mgbochi eletriki site na 11388 Ω ruo 28079 Ω, arụmọrụ iguzogide nchara bụkwa nke kachasị, 46.85%. Ma e jiri ya tụnyere mkpuchi seramiiki alumina dị ọcha, mkpuchi mejupụtara ya na graphene na carbon nanotubes nwere ike iguzogide nchara ka mma.
(2) Ka oge imikpu nke electrolyte na-abawanye, electrolyte na-abanye n'ime elu nkwonkwo nke mkpuchi / ihe mkpuchi iji mepụta ihe nkiri oxide metal, nke na-egbochi ịbanye nke electrolyte n'ime ihe mkpuchi ahụ. Mgbochi eletriki na-ebu ụzọ belata ma na-abawanye, iguzogide nchara nke mkpuchi seramiiki alumina dị ọcha adịghị mma. Nhazi na njikọta nke nanotubes carbon na graphene gbochiri ịbanye n'ime electrolyte. Mgbe a mikpuru ya ruo awa 19.5, mgbochi eletriki nke mkpuchi nwere ihe nano belatara site na 22.94%, 25.60% na 9.61% n'otu n'otu, iguzogide nchara nke mkpuchi ahụ dịkwa mma.
6. Usoro mmetụta nke mkpuchi iguzogide nchara
Site na usoro Tafel na mgbanwe nke uru mgbochi eletriki, achọpụtara na mkpuchi seramiiki alumina nwere graphene, nanotubes carbon na ngwakọta ha nwere ike ime ka iguzogide nchara nke matrix metal ka mma, mmetụta synergistic nke ha abụọ nwekwara ike ime ka iguzogide nchara nke mkpuchi seramiiki gluu dịkwuo mma. Iji chọpụtakwuo mmetụta nke ihe mgbakwunye nano na iguzogide nchara nke mkpuchi ahụ, a hụrụ ọdịdị elu micro nke mkpuchi ahụ mgbe ọ gbasịrị nchara.
Foto nke 5 (A1, A2, B1, B2) na-egosi ọdịdị elu nke ígwè anaghị agba nchara 304 a kpughepụrụ ekpughere na seramiiki alumina dị ọcha a kpuchiri ekpuchi na mmụba dị iche iche mgbe ọ gbasasịrị. Foto nke 5 (A2) na-egosi na elu mgbe ọ gbasasịrị aghọọ ihe siri ike. Maka ihe ndị gba ọtọ, ọtụtụ nnukwu olulu nchara na-apụta n'elu mgbe e mikpuru na electrolyte, na-egosi na nguzogide nchara nke matrix ígwè gba ọtọ adịghị mma na electrolyte dị mfe ịbanye n'ime matrix. Maka mkpuchi seramiiki alumina dị ọcha, dịka egosiri na Foto nke 5 (B2), ọ bụ ezie na a na-emepụta ọwa nchara porous mgbe ọ gbasasịrị, nhazi dị oke njọ na nguzogide nchara dị mma nke mkpuchi seramiiki alumina dị ọcha na-egbochi mwakpo nke electrolyte nke ọma, nke na-akọwa ihe kpatara mmezi dị irè nke mgbochi nke mkpuchi seramiiki alumina.
Ọdịdị elu nke mwnt-cooh-sdbs, mkpuchi nwere 0.2% graphene na mkpuchi nwere 0.2% mwnt-cooh-sdbs na 0.2% graphene. A pụrụ ịhụ na mkpuchi abụọ nwere graphene na Foto 6 (B2 na C2) nwere nhazi dị larịị, njikọ dị n'etiti ihe mkpuchi ahụ siri ike, a na-ekekọtakwa ihe ndị ahụ site na gluu. Ọ bụ ezie na elu ahụ na-emebi site na electrolyte, obere ọwa oghere na-etolite. Mgbe nchara gasịrị, elu mkpuchi ahụ dị oke ma enwere obere nhazi ntụpọ. Maka Foto 6 (A1, A2), n'ihi njirimara nke mwnt-cooh-sdbs, mkpuchi tupu nchara bụ nhazi porous nke kesara n'otu aka ahụ. Mgbe nchara gasịrị, pores nke akụkụ mbụ ahụ na-aghọ warara ma dị ogologo, ọwa ahụ na-adịkwa omimi. Ma e jiri ya tụnyere Foto 6 (B2, C2), nhazi ahụ nwere ntụpọ karịa, nke kwekọrọ na nkesa nha nke uru mgbochi mkpuchi nke enwetara site na ule corrosion electrochemical. Ọ na-egosi na mkpuchi seramiiki alumina nke nwere graphene, ọkachasị ngwakọta nke graphene na carbon nanotube, nwere ike iguzogide nchara kachasị mma. Nke a bụ n'ihi na nhazi nke carbon nanotube na graphene nwere ike igbochi mgbasa mgbawa nke ọma ma chebe matrix ahụ.
7. Mkparịta ụka na nchịkọta
Site na ule nguzogide nchara nke nanotubes carbon na ihe mgbakwunye graphene na mkpuchi seramiiki alumina na nyocha nke microstructure elu nke mkpuchi ahụ, a na-eme nkwubi okwu ndị a:
(1) Mgbe oge nchara ahụ dị awa iri na itoolu, na-agbakwunye 0.2% nke carbon nanotube ngwakọta + 0.2% graphene ngwakọta ihe mkpuchi seramiiki alumina, njupụta nke ikuku nchara mụbara site na 2.890 × 10-6 A / cm2 gbadaa ruo 1.536 × 10-6 A / cm2, a na-amụba ike mgbochi eletriki site na 11388 Ω ruo 28079 Ω, arụmọrụ iguzogide nchara bụkwa nke kachasị, 46.85%. Ma e jiri ya tụnyere mkpuchi seramiiki alumina dị ọcha, mkpuchi mejupụtara ya na graphene na carbon nanotubes nwere ike iguzogide nchara ka mma.
(2) Ka oge imikpu nke electrolyte na-abawanye, electrolyte na-abanye n'ime elu nkwonkwo nke mkpuchi / ihe mkpuchi iji mepụta ihe nkiri oxide metal, nke na-egbochi ịbanye nke electrolyte n'ime ihe mkpuchi ahụ. Mgbochi eletriki na-ebu ụzọ belata ma na-abawanye, iguzogide nchara nke mkpuchi seramiiki alumina dị ọcha adịghị mma. Nhazi na njikọta nke nanotubes carbon na graphene gbochiri ịbanye n'ime electrolyte. Mgbe a mikpuru ya ruo awa 19.5, mgbochi eletriki nke mkpuchi nwere ihe nano belatara site na 22.94%, 25.60% na 9.61% n'otu n'otu, iguzogide nchara nke mkpuchi ahụ dịkwa mma.
(3) N'ihi njirimara nke nanotubes carbon, mkpuchi ahụ e tinyere na nanotubes carbon naanị nwere nhazi oghere nke kesara n'otu aka ahụ tupu ọ gbawaa. Mgbe ọ gbawara agbawa, oghere nke akụkụ mbụ ahụ na-adị warara ma dị ogologo, ọwa ndị ahụ na-adịkwa omimi. Mkpuchi ahụ nwere graphene nwere nhazi dị larịị tupu ọ gbawaa agbawa, njikọta dị n'etiti ihe mkpuchi ahụ dị nso, a na-ejikwa gluu kechie ihe ndị ahụ niile nke ọma. Ọ bụ ezie na electrolyte na-emebi elu ya mgbe ọ gbawara agbawa, enwere obere ọwa oghere na nhazi ahụ ka dị oke. Nhazi nke nanotubes carbon na graphene nwere ike igbochi mgbasa mgbawa nke ọma ma chebe matrix ahụ.
Oge ozi: Maachị-09-2022