광촉매 NOx 제거
NOx + O2 + H2O → HNO3
개요
TiO₂ photocatalyst on building surfaces oxidizes nitrogen oxides (NOx) from vehicle exhaust to nitric acid (HNO₃), which is then washed away by rain. Photocatalytic concrete and pavement coatings can reduce local NOx levels by 25–45%. This passive pollution remediation works continuously in sunlight.
참여 물질
일상 속 예시
Some cities use photocatalytic concrete in roads and buildings that actively clean the air of vehicle exhaust pollution.
산업적 중요성
광촉매 건축 자재는 도시 환경의 대기질 개선을 위한 성장하는 시장을 대표합니다.
성질
- 유형
- 광화학
- 가역 반응
- 아니오
- 에너지
- 발열
- ΔH
- -206.0 kJ/mol
- 촉매
- TiO₂ (titanium dioxide)
자주 묻는 질문
What is the equation for 광촉매 NOx 제거?
The balanced equation is: NOₓ + O₂ + H₂O → HNO₃.
What type of reaction is 광촉매 NOx 제거?
광촉매 NOx 제거 is a 광화학 reaction.
Is 광촉매 NOx 제거 exothermic or endothermic?
광촉매 NOx 제거 is exothermic (releases energy). The enthalpy change (ΔH) is -206.0 kJ/mol.
What conditions are needed for 광촉매 NOx 제거?
This reaction requires a catalyst (TiO₂ (titanium dioxide)).