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The RGO-supported HoVO 4 -ZnO nanocomposite was synthesized using the ultra sonication process. X-ray diffraction patterns, Field emission scanning electron microscopy, high resolution transmission electron microscopy, Diffractive Reflectance spectroscopy, and photoluminescence spectroscopy were employed to examine the heterostructured photocatalyst in this research study. The photocatalytic efficiency of the RGO-supported HoVO 4 -ZnO nanoparticles, under UV light irradiation, in the degradation of Rhodamine-B dye was investigated. Undoped ZnO, bare HoVO4, and HoVO 4 -ZnO, degraded at 55.6, 57.5, and 74.33 percent in 45 min, respectively. This new RGO coupled HoVO 4 -ZnO exhibits enhanced photocatalytic efficiency compared to the bare ZnO and HoVO 4 -ZnO nanocomposite. [Display omitted] • RGO coupled HoVO 4 -ZnO exhibits enhanced photocatalytic efficiency. • SEM images display existence of cavities in the lattice structure. • Incorporation of RGO into the crystal structure minimizes aggregation and crystal size. • HR TEM indicates concentric ring with occasional brilliant spots. • Narrower photoluminescence spectrum for new Nanocomposite. [ABSTRACT FROM AUTHOR]

Lychee-like Mesoporous Silica Nanoparticles (LMSN) were synthesized and functionalized with 3-Aminopropyltrimethoxysilane (3-APTMS) and a novel binuclear Copper complex. The synthesized materials were characterized by UV-DRS, Fourier transform infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Analysis (EDAX) analysis. The High Resolution Transmission Electron Microscopy (HR-TEM) analysis gives view on retention of structural order after functionalization. Thermogravimetric Analysis (TGA), low angle X-ray diffraction (XRD) and BET-BJH analyses confirmed the presence of schiff base complex moieties inside the pore architecture. Electron Spin Resonance (ESR) analysis provide evidence for the presence of paramagnetic copper and ICP-OES studies details the metal loading. The potential of synthesized material as an enzyme-mimetic catalyst for the synthesis of questiomycin A and Rhodamine B degradation agent was analysed in this work. The catalyst material served best with good yields and reusability. [Display omitted] • The lychee-like Mesoporous Silica Nanoparticles (LMSN) was functionalized with a novel binuclear copper complex. • Its potential towards questiomycin A synthesis and rhodamine B degradation were studied. • The synthesized catalyst showed good ability for degradation of dye and for questiomycin A synthesis. [ABSTRACT FROM AUTHOR]