Publications

Monodisperse Pt nanoparticles (NPs) studded in a three-dimensional (3D) graphene nanobox are successfully synthesized through a simple in-situ confined growth route for the first time. The nano-zeolite A was used as a 3D substrate for in-situ growth of tri-layered graphenes on the crystal-surfaces, meanwhile, the inner micropores of which can also be utilized for the confined growth of Pt nanoparticles. The graphene sheets are curved on the edges to form a 3D hollow box morphology, where the monodisperse Pt nanoparticles are homogeneously studded on the inner surfaces. Moreover, the Pt content can be regulated from ∼8 to 50 wt%, and the particle size can be tuned from 2-5 nm by varying the pristine Pt-ion loading amount and CVD temperature. The Pt NP@graphene nanoboxes possess not only large pore volumes to effectively accommodate large amounts of oxygen, but also supply excellent electrical conductivity for the fast transfer of electrons (∼3.96 e(-)), resulting in a high efficiency (175 mA/mg Pt) and long-term stability (above 1000 cycles) for the oxygen reduction reaction.

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

Abstract Electrochemical reduction of CO 2 into various chemicals and fuels provides an attractive pathway for environmental and energy sustainability. It is now shown that a FeP nanoarray on Ti mesh (FeP NA/TM) acts as an efficient 3D catalyst electrode for the CO 2 reduction reaction to convert CO 2 into alcohols with high selectivity. In 0.5 m KHCO 3 , such FeP NA/TM is capable of achieving a high Faradaic efficiency (FE ) up to 80.2 %, with a total FE of 94.3 % at −0.20 V vs. reversible hydrogen electrode. Density functional theory calculations reveal that the FeP(211) surface significantly promotes the adsorption and reduction of CO 2 toward CH 3 OH owing to the synergistic effect of two adjacent Fe atoms, and the potential‐determining step is the hydrogenation process of *CO.

AbstractSilver doped polyaniline phosphotungstate (PANI-PW/Ag) composite was synthesized sol-gel method and treated with silver nitrate resulting silver doped PANI-PW/Ag. Physicochemical characterization of PANI-PW/Ag was carried out by scanning electron microscopy and Fourier transform infrared spectroscopy (FT-IR). Electrical conductivity measurements and thermal effect on conductivity of PANI-PW/Ag was also studied after treatment with HCl. The dc conductivity was found within the range of 4.82 × 10−3 S/cm−1 for HCl doped, measured by 4-in line–probe dc electrical conductivity measuring technique. Thermal conductivity is stable with all temperatures in isothermal studies showing excellent stability of PANI-PW/Ag material.Keywords: electrically conductingnanocompositeoptical microscopyphysical methods of analysispolymer-matrix composites

A critical component of Saudi Arabia's Vision 2030 reform agenda is its alignment with the Sustainable Development Goals (SDGs), particularly SDG 3, which is dedicated to the promotion of health and well-being for all. This narrative review offers a mid-term assessment of Saudi Arabia's progress in attaining these objectives, with a particular emphasis on the public health initiatives and comprehensive healthcare reforms that have been implemented as part of this vision. The Kingdom has accomplished substantial reductions in maternal and neonatal mortality rates, with skilled birth attendance reaching nearly universal levels. Saudi Arabia is a regional leader in the field of infectious diseases, having achieved the 95-95-95 HIV targets and significantly reduced the incidences of tuberculosis and malaria. Additionally, the rates of premature mortality from conditions such as cancer, diabetes, and cardiovascular diseases have decreased as a result of efforts to combat non-communicable diseases. Mental health services have been substantially expanded, which has resulted in one of the lowest suicide rates reported worldwide. Substantial investments have collectively improved the universality and quality of healthcare services in health infrastructure, such as the expansion of primary healthcare centers and the integration of digital health solutions, which have supported these health achievements. Saudi Arabia continues to confront persistent obstacles, including the management of the increase in non-communicable diseases, the mitigation of environmental health risks, and the reconciliation of healthcare access disparities, despite these accomplishments. The review recommends that the social determinants of health be addressed through a sustained commitment to cross-sectoral collaboration, enhanced data collection and utilization for health policy-making, and further integration of technology in healthcare delivery. This review not only emphasizes the Kingdom's successes but also the intricate challenges it has encountered, providing valuable insights into the strategic planning required to maintain health gains and achieve SDG 3 by 2030. Saudi Arabia's innovative approach and robust policy implementation serve as a model for the integration of health priorities into national development frameworks, thereby improving health outcomes and contributing to sustainable development.

Spatially resolved photoluminescence (PL) and electroluminescence (EL) imaging technologies play a crucial role in evaluating the performance and stability of photovoltaic devices. However, their application in perovskite devices presents unique challenges. In this study, we report a discrepancy between the electrical performance of perovskite solar modules (PSMs) and the EL images. Following the application of a reverse bias voltage, we observed an increase in EL brightness associated with prolonged carrier lifetime and transport length. Furthermore, cross-sectional Kelvin probe force microscopy identified a significant potential increase primarily at the electron-transport layer (ETL) side after reverse bias, suggesting the presence of defective ETL/perovskite interfaces with filled hole traps. To address this EL mismatch, we proposed a mild reverse current recovery method aimed at aligning EL images with the cell performance without compromising device efficiency. This approach effectively mitigates discrepancies, ensuring alignment between the device performance and EL imaging. Our study underscores that caution is required when utilizing EL imaging to monitor spatial homogeneity in PSMs for future industrial production.

This study reports the synthesis of a series of new 2-amino-3-cyano-8-methyl-4-substituted-5,6,7,8-tetrahydroquinolines along with some derived fused-ring systems. Ten compounds have shown remarkable cytotoxic activity against human colon carcinoma HT29, hepatocellular carcinoma HepG2 and Caucasian breast adenocarcinoma MCF7 cell lines. Six compounds showed considerable broad-spectrum cytotoxic activity among which two proved to be the most active derivatives. Likewise, seven compounds from the series were found to exhibit significant antimicrobial activity and three of them proved to be the most active candidates. Two alkylthio-pyrimido quinolines are suggested as possible antimicrobial and anticancer candidates in the present series.

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

Pd-catalyzed direct C2 arylation and Cu-catalyzed direct one-pot alkynylation/intramolecular cyclization of azolium N-imides are reported. Various acetylenes, aryl iodides, and 1-alkyl substituents were examined. The mild protocol allows direct C2 arylation of azolium N-imides without the use of specialized reagents together with novel one-pot regioselective preparations of imidazole-pyrazolo and pyrazolo-1,2,4-triazole ring systems. The electronic properties of selected examples were examined by fluorescence spectroscopy.

Abstract Metal‐free heterostructure photocatalysts composed of black phosphorus (BP) and polymeric carbon nitride (CN) are successfully synthesized via a one‐step liquid exfoliation method assisted by sonication. The combination of BP with CN strengthens the visible‐light harvesting ability, facilitates the charge separation in the photocatalytic process, and renders promoted activity of photoinduced molecular oxygen activation, such as superoxide radicals (·O 2 − ) evolution and H 2 O 2 production. This work highlights that coupling semiconductors with well‐matched band levels provide a flexible route to enhance the performance of photocatalysts for producing reactive oxygen species, and gives ideas for the design of highly active and metal‐free materials toward sustainable solar‐to‐chemical energy conversion and environmental remediation.