Axs d4 endeavour x diffractometer

X-ray diffraction
(XRD) patterns for all SrRuO₃/g-C₃N₄ samples were obtained with a Bruker AXS D4 Endeavour X diffractometer.
Transmission electron microscopy (TEM) images of pure SrRuO₃, g-C₃N_4, and mesoporous 1.5% SrRuO₃/g-C₃N₄ heterostructure acquired using a JEOL
JEM-2100F electron microscope (Japan) operated at 200 kV. Fourier
transform infrared (FT-IR) spectra in the range of 400–4000
cm^–1 for all SrRuO₃/g-C₃N₄ samples were recorded using a PerkinElmer after adding KBr.
The N₂ adsorption/desorption isotherms were measured after
outgassing at 200 °C overnight by employing the Quantachrome
Autosorb equipment at 77 K. X-ray photoelectron spectroscopy (XPS)
measurement for the mesoporous 1.5% SrRuO₃/g-C₃N₄ heterostructure was conducted with a Thermo Scientific
K-ALPHA spectrometer. The diffuse reflectance spectra for pure SrRuO₃, g-C₃N₄, and all mesoporous SrRuO₃/g-C₃N₄ samples were measured using
a Varian Cary 100 scan UV–vis system in the wavelength range
of ∼200–800 nm. Photoluminescence (PL) spectra for pure
SrRuO₃, g-C₃N₄, and all mesoporous
SrRuO₃/g-C₃N₄ samples were measured
employing a 150 W xenon lamp as an excitation source at λ ∼
365 nm via a spectrofluorophotometer, (RF-5301 PC). A Zahner Zennium
electrochemical workstation was used to estimate the transient photocurrent
measurements.

The detailed physicochemical characterization
of the developed RuO₂/LaNaTaO₃ photocatalyst
was performed to have a better understanding of composition, structure,
and surface morphology of the perovskite photocatalysts. The X-ray
diffraction pattern was measured through Cu Kα_1/2, λα₁ = 154.060 pm, λα₂ = 154.439 pm radiation using a Bruker AXS D4 Endeavour X diffractometer.
Field emission secondary electron microscopy (FE-SEM) was conducted
with an FE scanning electron microanalyzer (JEOL-6300F, 5 kV). The
N₂ isotherm of the RuO₂/LaNaTaO₃ perovskites
was performed at 77 K by analyzing adsorption isotherms with a Micromeritics
ASAP 2010 volumetric adsorption unit. UV–vis diffuse reflectance
spectra (DRS) of the RuO₂/LaNaTaO₃ perovskites
were recorded on a UV–vis spectrophotometer (UV-2600, Shimadzu)
at λ = 200–800 nm. A VG Escalab 200R electron spectrometer
was applied to examine X-ray photoelectron spectra (XPS) for RuO₂/LaNaTaO₃ perovskites equipped with a Mg Kα
X-ray source powered at 100 W. The C 1s peak at 284.8 eV was employed
as calibration to estimate the binding energies (BE) of 1%RuO₂/LaNaTaO₃ perovskite.