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CO2 reduction with water and light illumination is realized using a nitride (InxGa1-xN) photoelectrode that separates pairs of electrons and holes, thereby driving oxidation and reduction reactions. InxGa1-xN is a promising material for photocatalysis due to its tuneable band gap and excellent optical properties. However, little research has been done on the effect of In contents on CO2 reduction in InxGa1-xN. In this work, the photocatalytic performance of different In contents of InxGa1-xN photoanodes and the electrode's corrosivity in the process of artificial photosynthesis were studied. We found that the photoanode containing 0.9% In enhanced the conversion to CO, CH4, C2H4, and C2H6. Our photoluminescence spectroscopy, scanning electron microscopy, and X-ray diffraction results suggested that photo-corrosion occurs on the photoanode's surface at the end of the reaction. [ABSTRACT FROM AUTHOR]

Successful growth of c-axis oriented aluminum nitride (AlN) films with uniform columnar structure on (0006) sapphire substrates by Radio Frequency (RF) reactive magnetron sputtering. In this paper, the crystal structure and morphological characteristics of AlN films were changed by varying the nitrogen (N2) flow ratio in the mixture of N2 and argon (Ar) gas, i.e., N2/(Ar + N2). Transmission electron microscopy and X-ray diffractometer analysis confirmed that the AlN films first formed a buffer layer at the interface and subsequently exhibited a high degree of c-axis orientation. Combined atomic force microscopy and scanning electron microscope tests show that the surface undulations of the AlN films were very small reaching a root mean square (RMS) surface roughness of 0.2750 nm. The X-ray photoelectron spectroscopy spectra confirmed the formation of AlN. Finally, the optical band gap and defect types of the films were determined by ultraviolet and visible spectrophotometry and photoluminescence spectrum. [ABSTRACT FROM AUTHOR]

In Fig. 5(b), The In0.009GaN0.0991/GaN should be changed to In0.071 GaN0.0929/GaN. The author apologizes for this error. [ABSTRACT FROM AUTHOR]