Uniform and magnetic recyclable mesocrystalline Zn-doped Fe3O4 hollow submicrospheres (HSMSs) were successfully synthesized via a simple one-pot solvothermal route used for efficient heterogeneous photo-Fenton catalyst. XRD, XPS, Raman spectroscopy, Mössbauer SEM, HRTEM, EDX analyses revealed that the shell of HSMSs is highly porous assembled by oriented attachment magnetite nanocrystal building blocks with Zn-rich surfaces. Furthermore, possible formation mechanism materials was proposed....

In this work, we successfully synthesized Cr3+ doped ZnO nanoparticles using a sol-gel method, and elucidated how dopant is critical for enhancing photocatalytic activity. The nature of the point defect analyzed by electron spin resonance (ESR), photoluminescence (PL) emission revealed role dopant. When introducing ions in ZnO, PL intensity decreased, indicating reduction radiative recombination rate due to heterojunction formation between host. nanostructures showed that typical ESR signal...

Synthesizing novel photocatalysts that can effectively harvest photon energy over a wide range of the solar spectrum for practical applications is vital. Porphyrin-derived nanostructures with properties similar to those chlorophyll have emerged as promising candidates meet this requirement. In study, tetrakis(4-carboxyphenyl) porphyrin (TCPP) nanofibers were formed on surface ZnO nanoparticles using simple self-assembly approach. The obtained ZnO/TCPP nanofiber composites characterized via...

This study aimed to examine caregivers’ perceptions, practices, and challenges regarding rehabilitation services for people with disabilities, a focus on identifying factors influencing their decisions bring care recipients formal rehabilitation. A cross-sectional was conducted in rural Thai Nguyen Province, Vietnam. Data were collected from 214 primary caregivers using structured questionnaire covering demographics, caregiving roles, rehabilitation-related perceptions. pilot refine the...

In this work, we reported synthesis of a novel magnetically separable g-C3N4/Zn doped Fe3O4 composite (g-CN/ZnFe) by simple polyol thermal method. The characteristics the as-prepared was checked XRD, SEM, TEM, XPS, PL technologies. optimized weight ratio g-C3N4 and Zn investigated. addition, photocatalytic activities products were degradation Cephalexin (CEX) under visible light. results showed that g-CN/ZnFe with an added 20% exhibited highest activity for cephalexin light irradiation....

In situ g‐C 3 N 4 @ZnO nanocomposites (with 0, 1, 3, 5, and 7 wt.% of in nanocomposite) were synthesized via a one‐pot hydrothermal method using precursors urea, zinc nitrate hexahydrate, hexamethylenetetramine. The characterized by X‐ray diffraction, scanning electron microscope, diffuse reflectance spectroscopy, photoluminescence spectroscopy. photocatalyst activity was evaluated methylene blue degradation experiment under visible light irradiation. showed an enhancement photocatalytic...

This work investigated the optical and structural properties of hydrothermal titanium dioxide nanotube/graphene oxide (TNT/GO) composites. Transmission electron microscope (TEM) images showed tubular titanate with a homogeneous outer diameter size ~8 nm decrease TNT length in composite sample. Besides characteristic patterns titanate, revealed by x-ray diffractometry, both anatase (101) rutile (110) phases. The intensity lowest Eg Raman active mode TiO2 increased samples was blue-shifted...

Abstract A ZnO-TiO2-WO3 tertiary heterojunction was synthesized using the facile sol gel and calcination methods from Zn (II), Ti (IV) W (VI) precursors. The material exhibits remarkable photocatalytic performance, settling obstacles of pristine ZnO, TiO2, WO3 materials. results indicate that composite possesses a nanoparticle morphology alongside individual component phases. Inclusion expands absorption range towards visible region reduces recombination photogenerated electron-hole pairs...

Abstract In this study, reduced graphene oxide (rGO), ZnO nanocomposites, and zinc oxide-doped (ZnO/rGO) nanocomposites were successfully synthesized via the sol-gel method investigated for removal of methyl blue (MB) dye antibacterial activity under visible light irradiation. The characterized using XRD, SEM, EDX, FTIR, UV-Vis DRS, BET techniques to analyze crystallographic structure, phase, surface morphology, different functional groups in prepared catalysts. ZnO/rGO demonstrated a great...

Herein we studied the structure deformation and photoluminescence properties of titanium dioxide nanotube (TNT) hydrothermally grown on pristine graphene (Gr) surfaces. This Gr/TNT composite shows photocatalytic enhancement in terms methylene blue degradation efficiency short saturation time, as a result heterogeneous junction formation through interfacial connection by facile one-step hydrothermal method. The Gr content within composites was varied between 0.5 wt.%–8 wt.%, sample containing...

Aiming to assess the atomic-structural identity of inherently generated interfacial point defects during thermal oxidation, a conventional low-temperature electron spin resonance study has been carried out on (100)GaAs/native oxide structures thermally grown in range 350–615 °C both powders and slices semi-insulating (100)GaAs. This compellingly reveals substantial generation (density ∼ 1 × 1013 cm−2) 75AsGa+ antisites registry with GaAs substrate layer, thus providing solid independent...

Abstract Water pollution abatement is a problem in today’s society that requires urgent attention. Moreover, photocatalysts are an effective method to treat environmental pollution, and SnO 2 /reduced graphene oxide composite have been extensively studied recent years. The synthesis parameters for these significantly affect their morphologies, structures, properties. In this study, we investigated the effects of annealing temperatures on properties nanocomposites, which were hydrothermally...

The novel methods for determining the optimal moving trajectories and formation control of Multiple Mobile Robot System (MMRS) are studied in this paper. Ant Colony Optimization (ACO) algorithm combined with A <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$^{\ast }$ </tex-math></inline-formula> is employed to solve Inner Travel Salesmen Problem (ITSP) Salesman (IMTSP) obtain path MMRS. maps working...

In this paper, we investigate the origin of point defects revealed by electron spin resonance (ESR) and photoluminescence (PL) emission in correlation with photocatalytic activity ZnO nanocrystals subjected to thermal annealing at various temperatures. Two ESR signals g ∼ 1.96 ∼2.003 were consistently observed all annealed samples. However, their relative intensities have changed, indicating that defect densities influenced temperature. Interestingly, when doping nanoZnO Cr3+, Q-band...

Abstract Nitrogen-doped carbon hybridized nanodiamond (N-doped C@ND) materials have been developed and used as an electrocatalytic for oxygen reduction reactions (ORRs). The polymerized ionic liquids are employed to modify NDs then subjected thermal annealing at 600 °C, resulting in a high concentration of N-doped (9.33 at.%) frameworks attached on the ND surface. This C@ND material provides highly active mesoporous structure (4 nm pore) with surface area (366 m 2 g −1 ) allows enhancement...

This work investigates the effect of thermal annealing on crystalline structure and optical properties hydrothermal titanate nanotubes (TNTs). It shows that subjecting TNTs to air at 400 °C can be used form a junction between TiO2 nanoparticles. Furthermore, TNT microstructure is transformed from monoclinic anatase phase by process. As result self-junction formation, visible photocatalytic activity in degradation methylene blue enhanced annealed sample which pseudo-first-order model fits...

In this work, we successfully fabricated homogeneous hydrothermal titanate nanotubes (TNTs) coated with Ag nanoparticles (NPs) and elucidated the role of NPs on local surface plasmonic resonance, surface-enhanced Raman scattering, enhanced photocatalytic activity TNT/Ag nanocomposite. The results showed that photodegradation process reached equilibrium in just ~5 min for nanocomposite, which was much shorter than TNT sample (~90 min). TEM micrographs were well dispersed walls nanotubes. XRD...

In this study, we synthesized graphene oxide (GO) by modified low temperature Hummer’s method and in situ hydrothermally grown TiO­2 nanotube (TNT) onGO sheet. Transmission electron microscopic (TEM) images showed the homogeneous formation of TNT with mean diameter ~8 nm co-existence GO composite sample. X-ray differaction pattern indicated successful fabrication. The UV-vis measurement methylene blue improvement physical adsorption samples.&#x0D; Keywords&#x0D; TNTs, GO, adsorption,...

Electron spin resonance and electronic spectroscopy techniques were used to study the symmetry structure of Mn2+ dopants in solvothermally synthesized ZnS nanowires. The average diameter ∼5 nm leads observable quantum confinement effects photoluminescence excitation spectra. results clearly demonstrate three locations incorporation. Together with inferred center densities, these data indicate a much higher efficiency substitution nanowire sample about two times larger diameter.