MoO3

Name: MoO3
Brand: MatWorld

semiconductor

· MoO3

Molybdenum trioxide (MoO3) is a transition metal oxide semiconductor with a layered crystal structure that makes it amenable to exfoliation into thin films and 2D nanomaterials. It is employed in catalysis, electrochemistry, and optoelectronics—particularly in gas sensors, photocatalytic applications, lithium-ion battery cathodes, and as a catalyst support in petrochemical refining. Engineers select MoO3 for applications requiring combined oxidation catalysis and semiconductor behavior, or where its two-dimensional forms can improve surface area and charge transport compared to bulk alternatives.

gas sensing deviceslithium-ion battery cathodescatalytic convertersphotocatalytic water treatmentthin-film electronicselectrochromic displays

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	10,888	ksi	DFT · OptB88vdW
Exfoliation Energy(Eexf)	45.94	meV/atom	DFT · OptB88vdW
Poisson's Ratio(ν)	0.1800	-	DFT · OptB88vdW
Shear Modulus(G)	7,602.9	ksi	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1543	lb/in³	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	3.540	eV	Measured
↳	1.927	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)	31.22	-	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	7.121	-	DFT · OptB88vdW
Magnetic Moment(μB)	1.180	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.6626	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00195	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00120	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-311.4	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	445.5	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.9841	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-1.124	eV/atom	DFT · OptB88vdW
↳	-1.931	eV/atom	Measured

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

Regulatory Screening

Environmental

Export Control

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

MoO3 — Properties & Data | MatWorld

MoO3

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

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