Abstract
In this study, an environmentally friendly, cost-effective, and single-step procedure is used for the synthesis of polycrystalline Cu2O particles with controlled morphologies. Simple sugars are extracted from date fruit pulp (Phoenix dactylifera) and used as a reducing agent for the formation of Cu2O particles in aqueous medium. The feasibility of this solution is compared with the standard glucose solution. The Cu2O particles are characterized by electron microscopy, X-ray diffraction, optical absorption and Raman scattering techniques. It is concluded that the morphology of the particles is mainly influenced by the solvents. The obtained Cu2O particles are then used as an adsorbent to uptake As(III) ions from water. The maximum adsorption capacity (Q max) is estimated by Langmuir and Freundlich isotherms and it is found that Q max = 14.3 mg g–1. Adsorption kinetics study showed that the adsorption equilibrium could be achieved in 1 h and that the purified water meets the standards of World Health Organization (WHO) for acceptable amount of As(III) in drinking water. Adsorption kinetic models showed that the adsorption is chemisorption in nature.
Highlights
Cuprous oxide (Cu2O), a non-stoichiometric p-type semiconducting material, has attracted much attention for its catalytic, antibacterial, energy and environmental applications.[1,2] It is considered as a competent adsorbent for water purification due to its low toxicity and negligible solubility in water.[3,4,5] great efforts have been devoted to the synthesis of cheap, clean and surface-engineered Cu2O particles in recent years.Date fruit pulp is one of the most abundant natural sources of carbohydrate sugars
The present study demonstrated an easy single-step green synthesis process of polycrystalline Cu2O particles with controlled morphologies
The results revealed that the high glucose content in the date fruit pulp acts as a reducing agent in the formation of Cu2O particles, eliminating the use of expensive pure sugar alternatives
Summary
Cuprous oxide (Cu2O), a non-stoichiometric p-type semiconducting material, has attracted much attention for its catalytic, antibacterial, energy and environmental applications.[1,2] It is considered as a competent adsorbent for water purification due to its low toxicity and negligible solubility in water.[3,4,5] great efforts have been devoted to the synthesis of cheap, clean and surface-engineered Cu2O particles in recent years. Date fruit pulp is one of the most abundant natural sources of carbohydrate sugars. It contains about 70–90% of sugars in the form of glucose, sucrose, fructose and other reducing sugars. [6,7] this unique product can be explored to catalyze reactions as well as to make hydrophobic interactions with metallic ions in a suitable solvent In this context, Cu2O has recently been synthesized with the aid of natural carbohydrate sources.[9,10,11] its synthesis with the aid of date fruit pulp extract has not yet been elucidated. The synthesized Cu2O particles exhibited excellent adsorption characteristics and were used to remove As(III) from water
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