Environmental protection and the need for green energy have become a fundamental concern for humanity. Herein, to obtain high-performance catalysts, ultrasonic treatment in g-C 3 N 4 , Fe 2 O 3 , and EuVO 4 nanostructures effectively modified structural, optical, magnetic, photocatalytic, and electrocatalytic characteristics at the nanoscale level owing to the formation of ternary Fe 2 O 3 /EuVO 4 /g-C 3 N 4 nanocomposites. The charge−discharge chronopotentiometry and cyclic voltammetry methods were utilized for examination of electrochemical performances of as-fabricated composites. Also, degradation of the selected pollutant model (Rhodamine B (5 ppm)) through a photocatalytic approach was determined through experimental and kinetic studies. The effect of the EuVO 4 amount (5, 10, 15, and 20%) on the modification of ternary nanocomposites was compared to alter the morphology and optical and electrochemical properties. The recyclable magnetic Fe 2 O 3 /EuVO 4 /g-C 3 N 4 nanocomposite with 15% EuVO 4 achieves a high hydrogen storage capacity of 262.21 mAh g −1 in the 2 M KOH electrolyte after 15 cycles, and the apparent photocatalytic performance reaches 80.06% using visible source for removing of Rhodamine B. More importantly, the ternary Fe 2 O 3 /EuVO 4 /g-C 3 N 4 nanocomposites exhibit much higher hydrogen storage capacity and photocatalytic activity than the pristine EuVO 4 nanoparticles. Finally, the coexistence of EuVO 4 , Fe 2 O 3 , and g-C 3 N 4 offers an essential effect in achieving superior electrocatalytic and photocatalytic activity for hydrogen storage and water treatment.

The paper proposes a new approach to Schiff-base ligand assisted sonochemical synthesis of iron vanadate. In this disquisition, we tried to comparing various factors and reaction condition on morphology, size and uniformity of as-obtained samples. Some parameters including Schiff-base capping agent (Bis(acetylacetone) ethylenediamine=Hacacen), electrolyte (NHF), solvent and reaction time were investigated to reach optimum condition. XRD, FT-IR, EDS, SEM and TEM were used in order to determine purity and structural morphology of as-synthesized products. Also, we explore the possibility of coupling vanadium pantaoxide into iron vanadate that improves optical properties and photocatalytic activity. With this in mind, FeVO/VO nanocomposite was prepared via in-situ ultrasound-assisted procedure by using NHF in one step. Influence of different parameters such as type of dye (Rhodamine B=Rh B, Phenol red=Ph R and Methyl violet=MV) and light source (Ultraviolet and visible) on photocatalytic ability of samples were studied.

No abstract

This paper presents a new approach to preparation of neodymium vanadate nanostructures via facile sonochemical route. Several parameters were compared to reach optimum size and uniformity of as-made samples. These factors include sonication time, sonication power, solvent and using ethylenediamine as alkaline and capping agent, for the first time. Neodymium vanadate nano-photocatalyst applied in decolouration of dye as organic contaminant. Effect of type of dye, type of irradiation source, pH and catalyst loading was described on improving efficiency of catalyst function. Numerous techniques were specified in order to determine purity, morphology and optical properties of products consist XRD, FT-IR, EDX, SEM, TEM and DRS.