Tristar 3020 analyzer

Powder X-ray diffraction (XRD) measurements were acquired using a Bruker D8 X-ray diffractometer (Bruker, Germany) with Ni-filtered Cu K_α radiation (40 kV, 40 mA). Atomic force microscopy (AFM) images were obtained by using a Multimode 8 (Bruker, Germany) in the tapping mode. The size and morphology of the products were characterized by a field-emission scanning electron microscope (FESEM, S-4800, HITACHI, Japan) and transmission electron microscope (TEM, JEM-2100F, JEOL, Japan). Fourier transform infrared spectroscopy (FTIR) was determined by a Thermo Fisher Nicolet 6700 spectrometer (ThermoFisher, USA). X-ray photoelectron spectroscopy (XPS) measurements were recorded on KRATOS Axis Ultra Dld (SHIMADZU, Japan) equipped with a monochromatic X-ray source (Al K_α, hν = 1486.6 eV). UV-vis diffused reflectance spectra (UV-vis DRS) of the samples were analyzed using a UV-3600 UV-vis-NIR spectrophotometer (SHIMADZU, Japan) at room temperature. Photoluminescence (PL) spectrum was recorded on a on a Fluorescence Spectrophotometer (F-7000, HITACHI, Japan) at an excitation wavelength of 380 nm. The transient state fluorescence spectra were tested by fluorescence spectrometer (FLS920, Edinburgh Instruments, UK). Nitrogen adsorption isotherm measurements were carried out at 77 K with a Micromeritics Tristar 3020 analyzer (USA).

The X-ray diffraction (XRD) patterns of all as-made samples were measured by an X-ray diffractometer (Bruker D8 Advance). Fourier transform infrared spectra (FTIR) of all as-prepared samples were detected by Thermo Fisher Scientific IS10. The X-ray photoelectron spectroscopy (XPS) of g-C₃N₄/Bi₁₂O₁₇Cl₂ (3 wt%) composite was recorded on Thermo Fisher Scientific Escalab 250. The microtopographies of g-C₃N₄, Bi₁₂O₁₇Cl₂ and g-C₃N₄/Bi₁₂O₁₇Cl₂ (3 wt%) composite were observed using JEM-2100F transmission electron microscope (TEM). The UV-vis diffuse reflectance spectra (DRS) of as-made samples were collected by an UV-vis spectrometer (Agilent Cary 5000). BET surface areas of all as-made samples were collected using a Micromeritics Tristar 3020 analyzer. Samples were outgassed at 150 °C for 12 h prior to measurements. Transient photocurrent properties of g-C₃N₄, Bi₁₂O₁₇Cl₂ and g-C₃N₄/Bi₁₂O₁₇Cl₂ (3 wt%) were measured by a CHI760 electrochemical system (China) in a three-electrode quartz cells. Pt wire was the counter electrode, and the saturated calomel electrode was the reference electrode. The sample films coated on ITO glasses were applied as the working electrode was. A 300 W Xe lamp with 400 nm filters provided the light source, and the electrolyte was 0.1 M Na₂SO₄. The total organic carbon (TOC) assays were investigated by using a Shimadzu TOC-VCPH analyzer.