镂空分级金属氧化物纳米结构的设计制备、气敏性能与机理研究.pdf

镂空分级金属氧化物纳米结构的设计制备、气敏性

能与机理研究

Title:Design,Fabrication,GasSensingPerformance,and

MechanismStudyofHollowHierarchicalMetalOxideNanostructures

Abstract:

Metaloxidematerialshaveattractedsignificantattentioninrecent

yearsduetotheirexcellentgassensingproperties.Inparticular,hollow

hierarchicalmetaloxidenanostructureshaveshownpromisingpotential

forgassensingapplications.Thispaperpresentsacomprehensive

reviewonthedesign,fabrication,gassensingperformance,and

mechanismstudyofhollowhierarchicalmetaloxidenanostructures.

Introduction:

Metaloxidenanoparticleshavebeenextensivelystudiedfortheir

uniqueproperties,suchashighsurfacearea,abundantactivesites,and

adjustablemorphology.However,thegassensingperformanceofmetal

oxidenanoparticlesisoftenlimitedbytheirtendencytoagglomerate

andinsufficientexposureoftheactivesites.Toovercomethese

challenges,researchershaveturnedtheirattentiontohollow

hierarchicalmetaloxidenanostructures.Thesenanostructurescombine

theadvantagesofhollowstructures(increasedsurfaceareaand

enhancedmassdiffusion)andhierarchicalstructures(uniquepore

structureandimprovedgasdiffusion).Thispaperaimstoprovidea

comprehensiveoverviewoftheresearchprogressinthisfield.

DesignandFabricationofHollowHierarchicalMetalOxide

Nanostructures:

Varioussyntheticstrategieshavebeendevelopedtodesignand

fabricatehollowhierarchicalmetaloxidenanostructures.Theseinclude

template-assistedsynthesis,sacrificialtemplatemethods,sol-gel

processes,hydrothermalapproaches,andself-assemblytechniques.

Eachmethodhasitsadvantagesandlimitations,andthechoiceof

methoddependsonthedesiredstructureandpropertiesofthemetal

oxidenanostructures.

GasSensingPerformanceofHollowHierarchicalMetalOxide

Nanostructure