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Solar energy is one of the most promising and developed technologies in recent years, due to its high efficiency and low cost. Perovskite-type solar cells have been the focus of attention by the world scientific community. The main objective of this article is to present an (PSCs) analysis of the various investigations reported on the development of ABX3 inorganic halide perovskite-based solar cells, with emphasis in the effect that temperature and humidity have on their chemical and crystal structure stability. The main methods that are used to obtain ABX3 inorganic halide perovskites are also presented and analyzed. An analysis about the structure of these photovoltaic cells and how to improve their efficiency (PCS), fill factor (FF), short circuit current density (Jsc) and open circuit voltage (Voc) of these devices is presented. As a conclusion, a relationship of the methods, synthesis variables, and type of inorganic halide perovskite used for the development of devices with the best efficiencies is presented; the trends towards which this area of science is heading are also highlighted.

In this work it was possible to synthesize novel CSH-nylon 6/66 nanocomposites using a simple and easy methodology such as the solution mixing method and using green solvents like water, formic acid and ethanol.

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BACKGROUND: Alkaline amorphization of fly ash (FA) and crystallization of the potassium W zeolite from the resultant amorphous materials was carried out at different scales by a straightforward hydrothermal method. The experimental factors and levels were evaluated during the FA amorphization study by variation of the metallic hydroxide, concentration, temperature and time for the hydrothermal reaction. RESULTS:The alkaline FA hydrothermal activation study quantified a set of optimal conditions to obtain amorphous materials easy to be recrystallized into W zeolite. The activation process at laboratory scale involved the hydrothermal treatment of 3.6 g FA with 74.43 mEq KOH dissolved in 21 mL water at 125 ∘ C for 4 h. A product with ≤94.7% of the amorphous phase was obtained. The direct zeolitization of FA was performed at 175 ∘ C for 16 h with a KOH:FA weight ratio of 0.33 and molar ratios of 1.64, 17.08 and 3.90 for SiO 2 :KOH, H 2 O:SiO 2 and SiO 2 :Al 2 O 3 , respectively. An amount of dried zeolitic material c.25% higher than the weight of FA used was obtained. CONCLUSION: Adsorbents formulated with the W zeolite showed higher water adsorption capacity than the commercial molecular sieves used by industry for drying wet natural gas.