i ABSTRACT Over the past years, an interest has arisen in resolving two major issues: increased carbon dioxide (CO 2) emissions and depleting energy resources. A convenient solution would be a process that could simultaneously use CO 2 while producing energy. The photocatalytic reduction of CO 2 to fuels over the photocatalyst titanium dioxide (TiO 2) is such a process. However, this process is...

We synthesized ZnO nanorods (NRs) using simple hydrothermal method, with the simultaneous incorporation of gallium (Ga) and indium (In), in addition, investigated the co-doping effect on the morphology, microstructure, electronic structure, and electrical/optical properties. The growth behavior of the doped NRs was affected by the nuclei density and polarity of the (001) plane. The c-axis param...

Cobalt-doped tungsten disulfide nanorods were synthesized by an approach involving exfoliation, intercalation, and the hydrothermal process, using commercial WS2 powder as the precursor and n-butyllithium as the exfoliating reagent. XRD results indicate that the crystal phase of the sample is 2H-WS2. TEM images show that the sample consists of bamboo-like nanorods with a diameter of around 20 n...

We performed an extensive characterization of Co-doped polycrystalline 122 iron pnictide samples, As with , 0.09, 0.1, 0.12, by means of high-field magnetization and 1st and 3rd harmonic susceptibility response measurements. From loops through the Bean model formula both the magnetic field and dependences of the are derived. From the 3rd harmonic response of the susceptibility as a function of ...

For ex-situ co-doping methods, sintering at high temperatures enables rapid diffusion of Sn(4+) and Be(2+) dopants into hematite (α-Fe2O3) lattices, without altering the nanorod morphology or damaging their crystallinity. Sn/Be co-doping results in a remarkable enhancement in photocurrent (1.7 mA/cm(2)) compared to pristine α-Fe2O3 (0.7 mA/cm(2)), and Sn(4+) mono-doped α-Fe2O3 photoanodes (1.0 ...

To cater for the demands of electrochemical energy storage system, the development of cost effective, durable and highly efficient electrode materials is desired. Here, a novel electrode material based on redox active β-Co(OH)2 and B, N co-doped graphene nanohybrid is presented for electrochemical supercapacitor by employing a facile metal-organic frameworks (MOFs) route through pyrolysis and h...

The modified TiO2 nanoparticles (NPs) to enhance their catalytic activities by doping them with the five transition metals (Cr, Mn, Fe, Co, and Ni) have been investigated using various surface analysis techniques such as scanning electron microscopy (SEM), Raman spectroscopy, scanning transmission X-ray microscopy (STXM), and high-resolution photoemission spectroscopy (HRPES). To compare cataly...

The effect of Fe-Ga pair defects on minority-carrier lifetime τ in high-purity, dislocation-free float-zoned Si is presented, and their properties are documented by deeplevel transient spectroscopy and annealing studies. The typical τ of Fe-Ga co-doped crystals (0.4 μs) was dramatically lower than τ of crystals doped with similar amounts of either Fe alone (12 μs) or Ga alone (1,400 μs), contra...

Cobalt-doped tungsten disulfide nanorods were synthesized by an approach involving exfoliation, intercalation, and the hydrothermal process, using commercial WS2 powder as the precursor and n-butyllithium as the exfoliating reagent. XRD results indicate that the crystal phase of the sample is 2H-WS2. TEM images show that the sample consists of bamboo-like nanorods with a diameter of around 20 n...

Under 971 nm excitation, bright green and red emissions from Yb(3+)/Er(3+) co-doped Ba5Gd8Zn4O21 phosphor can be observed, especially the intense red emission in highly doped samples. The experimental results indicate that Ba5Gd8Zn4O21:Yb(3+), Er(3+) emits stronger upconversion luminescence than NaYF4:Yb(3+), Er(3+) under a low excitation power, and a maximum upconversion power efficiency of 2....