Ground-level ozone has been increasing worldwide, mainly due to the high anthropogenic
emissions of NOx and VOCs. In addition, ozone generators are sold as water and air …

Several gas molecules of environmental and domestic significance exhibit a strong deep-UV
absorption. Therefore, a sensitive and a selective gas detector based on this unique …

As a renewable and carbon-free fuel with high energy density, ammonia (NH 3) is a
promising alternative to fossil fuels. Real-time detection of its temperature and concentration …

Direct-determination is a fast and free of contamination method for analysis of substances in
water samples. However, direct-determination of SO 4 2− with high concentration in …

A novel ozone sensor based on Ni–Al layered double hydroxide (NiAl–LDH) that operates at
room temperature (25° C) was developed. The NiAl–LDH was successfully synthesized …

The variation of spectra and the characteristics of electronic excitation are critical for
establishing a model for quantifying sulfate at high concentrations. The absorption …

Ozone (O3) is a critical gas in various industrial applications, particularly in semiconductor
manufacturing, where it is used for wafer cleaning and oxidation processes. Accurate and …

Soil spectroscopy measurement is widely used to determine the macronutrients content in
the soil. Spectrometer is costly equipment and commonly used to determine the …

The manuscript is a review of basic essentials to ozone gas sensing with optical methods.
Optical methods are employed to monitor optical absorption, emission, reflectance and …

In ultraviolet absorption spectroscopy, sensitivity of ozone concentration measurement is low
when transmittance is too high or too low. This is because transmittance of light influences …