Structural, Optical, Electrical and Photocatalytic Investigation of n-Type Zn2+-Doped α-Bi2O3 Nanoparticles for Optoelectronics Applications.

Herein, n-type pure and Zn2+-doped monoclinic bismuth oxide nanoparticles were synthesized by the citrate sol-gel method. X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), photoluminescence (PL) analysis, ultraviolet-visible (UV-vis) spectroscopy, and Hall effect measurements were used to study the effect of Zn2+ on the structural, optical, and electrical properties of nanoparticles. XRD revealed the monoclinic stable phase (α-Bi2O3) of all synthesized samples and the crystallite size of nanoparticles increased with increasing concentration of dopant. Optical analysis illustrated the red shift of absorption edge and blue shift of band gap with increasing concentration of dopant. Hall Effect measurements showed improved values (2.79 × 10-5 S cm-1 and 6.89 cm2/V·s) of conductivity and mobility, respectively, for Zn2+-doped α-Bi2O3 nanoparticles. The tuned optical band gap and improved electrical properties make Zn2+-doped α-Bi2O3 nanostructures promising candidates for optoelectronic devices. The degradation of methylene blue (MB, organic dye) in pure and zinc-doped α-Bi2O3 was investigated under solar irradiation. The optimum doping level of zinc (4.5% Zn2+-doped α-Bi2O3) reveals the attractive photocatalytic activity of α-Bi2O3 nanostructures due to electron trapping and detrapping for solar cells.

Bimetallic nanoparticles supported on Ce-BTC for highly efficient and stable reduction of nitroarenes: Towards environmental sustainability.

The development of a catalyst with a consistent and clearly defined crystal structure is crucial for establishing an efficient catalytic performance system. This study focuses on catalyzing the reduction of nitroarenes to amino-derivatives in an aquatic environment at ambient temperature, employing metallic (Au) and bimetallic (Au-Pd or Au-Ag) nanoparticles loaded on a Ce-BTC metal-organic framework using a facile sol-immobilization approach. Diverse analytical instruments, comprising SEM, TEM, XRD, FT-IR, XPS, TGA, and N2 isotherm, have been utilized to characterize the synthesized catalysts. Among the catalysts that were fabricated, Au-Pd@Ce-BTC displayed the maximum catalytic efficacy, offering a rate constant (kapp) of 0.5841 min-1, conversion percentages reaching 99.7%, and a KAF of 116.8 min-1g-1. Moreover, it exhibited remarkable recyclability over five consecutive cycles. This catalyst offers the advantages of operating under ambient reaction conditions and exhibiting tolerance to a broad range of substrates containing various functional moieties. The mechanistic understanding of nitroarene reduction and the factors contributing to the superior activity of Au-Pd/Ce-BTC are explored through spectroscopic and porosity analyses. Spectroscopic measurements indicate that the elevated Auo and Pdo/Pd2+ ratio, increased surface area, and the synergistic collaboration of the bimetallic NPs are key factors contributing to the heightened activity of Au-Pd/Ce-BTC. These findings hold significant appeal from both an industrial and academic standpoint.

Relation between socio-demographic factors and professionalism among nurses in Saudi Arabia: A comparative analysis.

Background: Analyzing how nurses handle professionalism in their careers will help all concerned individuals identify areas of concern to develop and enhance further to achieve or maintain a high degree of professionalism. Objective: This study aimed to determine the level of professionalism among nurses and its differences according to socio-demographic characteristics. Methods: A quantitative cross-sectional approach was utilized in three significant regions of Saudi Arabia. A simple random sampling technique was employed with 305 respondents, resulting in a 95.9% response rate. A Google Form survey was used to collect the data between January and April 2021. Results: Nurses perceived themselves highly in professional organization (Mean = 3.94, SD = 0.17), belief in public service (Mean = 3.91, SD = 0.22), belief in self-regulation (Mean = 3.97, SD = 0.08), sense of calling (Mean = 4.01, SD = 0.13), and belief in autonomy (Mean = 3.71, SD = 0.15). There was no significant difference between gender and professional organization, belief in public service, self-regulation, or belief in autonomy. Still, there was a significant difference in belief in public service (t = 2.794; p = 0.006) and sense of calling (t = 4.290; p = 0.001). As to age, only belief in self-regulation was significant (t = 5.984; p = 0.003). Moreover, the educational qualifications reached an insignificant difference in professionalism. Conversely, the type of facility has been found to have reached significant differences with a professional organization (F = 3.057; p = 0.029), belief in public service (F = 4.130; p = 0.007), beliefs in regulation (F = 3.452; p = 0.017), sense of calling (F = 3.211; p = 0.023), and belief in autonomy (F = 5.995; p = 0.001). Lastly, the current position found no significant difference in professionalism. Conclusion: Nurses in the Kingdom of Saudi Arabia perceived themselves as highly professional, and male nurses were found to have a sense of calling more than their female counterparts. Age, educational qualification, and current position had no significant difference in professionalism. Conversely, the type of facility had a significant difference with the belief in autonomy. These findings support and sustain the role of nurses in this 21st-century health care that is significantly needed to provide the most quality care.