Band Structure Tuning of ZnO/CuO Composites for Enhanced Photocatalytic Activity

Construction of an S-scheme TiOF2/HTiOF3 heterostructures with abundant OVs and OH groups: Performance, kinetics and mechanism insight.

Investigation of the simultaneous interactions of experimental variables and mechanism pathway in the photodegradation of methylene blue by binary ZnO/Cu2O photocatalyst

A new heterogeneous metal catalyst with greater catalytic activity and stability for peroxymonosulfate (PMS) activation is desirable to be explored. Recently, ABO3-type perovskites have attracted much attention in PMS activation, but there is still much space for improvement as its easy tailoring of composition and structure. Lately, a high-entropy perovskite showed an excellent redox and stability, being a promising material in the field of electrochemistry. Herein, a high-entropy perovskite La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3-δ, termed LCMFCN, was synthesized and first applied to activate PMS for organics degradation. In the presence of 0.05 g·L−1 LCMFCN and 1 mmol·L−1 PMS, 99.1 ± 0.6% of Rhodamine B (RhB, 10 mg·L−1) was degraded within 60 min, which outperformed most perovskites with a single cation at the B-site (e.g., LaNiO3). The LCMFCN also exhibited excellent stability, with RhB degradation efficiency of ∼96% after five consecutive cycles. 1O2 was suggested to play a vital role in RhB degradation in the PMS/LCMFCN system and two pathways of 1O2 generation were proposed: (i) 1O2 could evolve from the lattice oxygen, and (ii) 1O2 converted from O2•−. The results of this study suggest that the high-entropy perovskite can efficiently activate PMS for organics degradation, expanding the design range of perovskites application in water treatment. 

Utilization of stable and efficient perovskite La(Cr0.2Mn0.2Fe0.2Co0.2Ni0.2)O3-δ catalyst with high-entropy to boost peroxymonosulfate activation towards organics degradation

Alkali-activated slag backfill grout materials optimization: Statistical RSM modelling and NSGA-II performance control

This study investigates synthesis of erbium vanadate nanostructures via carboxylic-assisted pechini method to optimization the morphology, size and physicochemical properties. The optimized ErVO 4 nanoparticles with range size of 12–98 nm were subjected to photocatalytic ability for dye decolorization of Methyl orange (MO), Erythrosine (ER), and Methylene blue (MB) using ultraviolet irradiation. The correlation between the operational parameters (pollutant concentration and catalyst loading) and optoelectronic properties in addition to the catalytic performance of the ErVO 4 structure is reported. The ideal condition for activity of ErVO 4 nano-photocatalyst achieved in the 10 ppm aqueous solution of MB with catalyst loading of 0.05 g which presents 77.85% efficiency for decolorization of colored pollutant model. The recycle photocatalytic efficiency after 4 cycles is about 69.25%. Additionally, the photocatalytic mechanism direction studied in the presence of some scavengers which confirms the role of hydroxyl radical in the removal of MB. The magnetic properties of ErVO 4 studied through VSM which shows the paramagnetic behavior with saturation magnetization is 1.3341 emu g − 1 . • Synthesis of ErVO 4 using Pechini method in the presence of carboxylic acids. • Effect of carboxylic acids and diol agents inquired on the structure and purity. • Photocatalytic activity studied through modifying operational parameters. • Scavenger studies confirmed the photocatalytic mechanism and reactive species. 

M. Shihan

Papers

UV-light-induced photocatalytic response of Pechini sol–gel synthesized erbium vanadate nanostructures toward degradation of colored pollutants