1. Kodi chitsulo cha nanoporous ndi chiyani?
Nanoporous Metals (NPM) ndi gulu la zida zachitsulo zomwe zimakhala ndi minyewa yolumikizana (positive curvature) ndi njira za nanoporous (zopindika zoyipa), porosity yake yomwe ili yosachepera 50%, ndi ma submicron pores (Kuphatikiza ma micropores, mesopores ndi macropores okhala ndi mainchesi). wa 50-1000 nm) ali ndi chothandizira kwambiri kudera linalake la thovu. Monga momwe tawonetsera pa Chithunzi 1, kukula kwa pore kuyenera kukhala nanometer!
Kuyika kwa zida za porous zamitundu yosiyanasiyana (kuchokera kumanzere kupita kumanja, kukula kwake)
Nthawi zambiri, kaphatikizidwe wa porous nanometals makamaka kudzera pamwamba-pansi free mankhwala dzimbiri dealloying ndi electrochemical dealloying, ndipo akhoza kukonzekera ndi kaphatikizidwe pansi-mmwamba ntchito Chinsinsi njira. Apa ife makamaka kulankhula za kukonzekera njira dealloying kukonzekera porous zitsulo. Pazinthu zina zomwe zimagwiritsidwa ntchito nthawi zambiri, zigawo ziwiri kapena zingapo zomwe zingagwiritsidwe ntchito pogulitsa ziyenera kukwaniritsa mfundo izi: 1. Kuthekera kwa mgwirizano pakati pa zigawozo kuyenera kukhala kosiyana; 2. Chiŵerengero cha okhutira cha zigawo Pali malire; 3. Gawo limodzi lokhazikika lothandizira likhoza kupangidwa.
IUPAC Periodic Table of Elements, mabokosi ofiira ndi abuluu nthawi zambiri amagwiritsidwa ntchito pazinthu zachitsulo
Kuonjezera apo, kugawidwa kwa nanopore kwazitsulo za nanoporous kungakhale kofanana kapena kosafanana, ndithudi, zonse zimakhalapo nthawi zambiri. Pakadali pano, mawonekedwe a crystallographic ndi zolakwika za kristalo zazitsulo za nanoporous zimadalira mawonekedwe a microstructure a alloy precursors ndi njira yopangira. Chifukwa cha mawonekedwe apadera a microstructure, zitsulo za nanoporous zimatha kuwonetsa nthawi imodzi zitsulo ndi zipangizo zowonongeka, ndipo mapangidwe ake amagwirizana kwambiri ndi magetsi, maginito, kuwala, makina, catalytic ndi electrocatalytic properties.
a). TEM ya np-AuAg, b) 3D yomanganso chitsanzo
2. The microscopic makhalidwe a nanoporous zitsulo?
Mwachidziwitso, imodzi kapena zingapo mwa njira zitatu zotsatirazi zitha kugwira ntchito pamene chitsulo chimasungunuka mwachisawawa.
(1) Zitsulo zonsezi zimakhala ndi ionized, ndiyeno chitsulo chamtengo wapatali chimayikidwanso;
(2) Chitsulo chokhacho chimakhala ndi ionized ndikulowa mu yankho, pamene maatomu achitsulo cholemekezeka amaphatikizidwa ndi kufalikira kwa pamwamba;
(3) Chitsulo choyambira chokha ndicho ionize ndikulowa muzitsulo, ndipo maatomu azitsulo ziwirizo amayenda mu gawo lolimba ndi kufalikira kwakukulu.
Nthawi yotumiza: Feb-14-2022
