Heterogeneous Photochemistry in the Atmosphere

Degradation of crystal violet using copper modified iron oxide as heterogeneous photo-fenton reagent

The heterogeneous photo-Fenton degradation of crystal violet under visible light has been investigated usingcopper modified iron oxide. The photocatalyst has been prepared by coprecipitation method. The rate ofphotocatalyic degradation of dye was monitored spectrophotometrically. It has been observed thatphotocatalytic degradation follows pseudo first order kinetics. The effect of various param...

Wavelength Dependence of Nitrate Photochemistry on Mineral Dust Introduction Mineral dust aerosol in the atmosphere provide reactive surfaces for heterogeneous reactions of nitrogen oxides

Chemical and photochemical reactions on mineral oxide surfaces in gaseous and liquid phases: environmental implications of fate, transport and climatic impacts of mineral dust aerosol

Mineral dust aerosols emitted from the Earth crust during various natural and anthropogenic processes continuously alter the chemical balance of the atmosphere via heterogeneous processes and thus, impact on the global climate. Understanding of heterogeneous chemistry and photochemistry on mineral dust has become vital to accurately predict the effect of mineral dust loading on the Earth’s atmo...

Photochemistry simulation of planetary atmosphere using synchrotron radiation at Soleil. Application to Titan's atmosphere

We report here on the coupling of a gas reactor with a VUV beamline at the SOLEIL synchrotron radiation facility. The reactor may be irradiated window-less with gas pressure up to the atmosphere. The photochemistry is monitored by a mass spectrometer gas analyzer. This set up, termed APSIS for Atmospheric Photochemistry SImulated by Synchrotron, has been used to simulate the atmosphere of Titan...

Nitrate Photochemistry in Zeolite NaY: Product Formation and Product Stability under Different Environmental Conditions Introduction Mineral dust aerosol plays a critical role in atmospheric chemistry by providing reactive surfaces for trace atmospheric gases

Introduction Mineral dust aerosol plays a critical role in atmospheric chemistry by providing reactive surfaces for trace atmospheric gases. 1-3 Mineral dust particles undergo heterogeneous reactions with nitrogen oxides in the atmosphere to yield adsorbed nitrate, nitrate coatings or deliquesced nitrate layers. 1,4,5 Reactions that can alter NOx (NOx = NO + NO2) concentrations are of great imp...