Bi4 W2 O12

semiconductor

· Bi4 W2 O12

Bi₄W₂O₁₂ is a mixed-metal oxide semiconductor composed of bismuth and tungsten, belonging to the family of polyoxometalate-related compounds and layered perovskite materials. This is primarily a research material investigated for photocatalytic and electrocatalytic applications, valued for its narrow bandgap and layered crystal structure that facilitate charge separation. Industrial adoption remains limited, but the material shows promise as an alternative to conventional photocatalysts in environmental remediation and energy conversion, with potential advantages in visible-light responsiveness and compositional tunability compared to single-metal oxide semiconductors.

photocatalytic water splittingenvironmental remediation catalysisvisible-light photocatalystselectrochemical energy conversionresearch semiconductorspollution control applications

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	2.276	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-1.923	eV/atom	—

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

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.

Bi4 W2 O12

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control