Solid-state ion recognition strategy using 2D hexagonal mesophase silica monolithic platform: a smart two-in-one approach for rapid and selective sensing of Cd2+ and Hg2+ ions

pH Modulation of Super-Assembled Heteromembranes for Sustainable Chiral Sensing

“…X-ray photoelectron spectroscopy (XPS) was used to characterize the functional groups present on the surface of the MCS and MCSC. Figure S18 shows the survey spectra of MCS and MCSC, combined with the results of TGA (Figure c), which reveals that MCS includes the elements Si and O, while the MCSC includes the elements Si, O, and C. As displayed in Figure d, the Si 2p peak at 102.9 eV in MCSC and 103.3 eV in MCS are attributed to the Si–O bond. ,, For O 1s (Figure e), the peaks from MCSC at 531.98, 532.28, and 532.88 eV are attributed to the binding energies of the Si–O–C, −OH, and Si–O–CO bonds, respectively; while the peaks from MCS at 532.98 and 532.28 eV are attributed to the binding energies of the Si–O–Si and Si–OH, respectively. , Finally, the high-resolution spectrum of C 1s can be deconvoluted to three peaks at 289.48, 285.78, and 284.78 eV (Figure f), which correspond to −COOH, C–O, and C–C, respectively . Based on the results of XPS, it can be confirmed that the −COOH group was formed on the surface of the MCSC because the Resol-based phenolic resins were oxidized during pyrolysis, which leads to a higher surface charge density (calculated according to the equations in Supporting Infomation (SI)) and pH-sensitive performance (Figure S19 and Table S6).…”

“…Figure S18 shows the survey spectra of MCS and MCSC, combined with the results of TGA (Figure 3c), which reveals that MCS includes the elements Si and O, while the MCSC includes the elements Si, O, and C. As displayed in Figure 3d, the Si 2p peak at 102.9 eV in MCSC and 103.3 eV in MCS are attributed to the Si−O bond. 30,39,40 For O 1s (Figure 3e), the peaks from MCSC at 531.98, 532.28, and 532.88 eV are attributed to the binding energies of the Si−O− C, −OH, and Si−O−C�O bonds, respectively; while the peaks from MCS at 532.98 and 532.28 eV are attributed to the binding energies of the Si−O−Si and Si−OH, respectively. 39,41 Finally, the high-resolution spectrum of C 1s can be deconvoluted to three peaks at 289.48, 285.78, and 284.78 eV (Figure 3f), which correspond to −COOH, C−O, and C− C, respectively.…”

“…30,39,40 For O 1s (Figure 3e), the peaks from MCSC at 531.98, 532.28, and 532.88 eV are attributed to the binding energies of the Si−O− C, −OH, and Si−O−C�O bonds, respectively; while the peaks from MCS at 532.98 and 532.28 eV are attributed to the binding energies of the Si−O−Si and Si−OH, respectively. 39,41 Finally, the high-resolution spectrum of C 1s can be deconvoluted to three peaks at 289.48, 285.78, and 284.78 eV (Figure 3f), which correspond to −COOH, C−O, and C− C, respectively. 30 Based on the results of XPS, it can be confirmed that the −COOH group was formed on the surface of the MCSC because the Resol-based phenolic resins were oxidized during pyrolysis, 42 which leads to a higher surface charge density (calculated according to the equations in Supporting Infomation (SI)) and pH-sensitive performance (Figure S19 and Table S6).…”

Selenium-transition metal supported on a mixture of reduced graphene oxide and silica template for water splitting

“…1 Hydrogen is a clean and efficient energy source that may be used to generate electricity in the stationary industrial and domestic and automotive sectors. 2–4 There are two main approaches for low temperature water electrolysis: liquid alkaline using a KOH electrolyte and polymer electrolyte membrane using a solid ion exchange membrane, depending on the kind of electrolyte. The most applicable kind of both is the alkaline one.…”