Novel Z-Scheme/Type-II CdS@ZnO/g-C3N4 ternary nanocomposites for the durable photodegradation of organics: Kinetic and mechanistic insights

Recovery of Valuable Materials from End-of-Life Photovoltaic Solar Panels

“…Moreover, the sharp peaks at 296.99 and 294.1 eV are characteristic of K 2p2/3 and 2p1/2, respectively. The two peaks centered at 170.03 and 167.76 eV are also characteristics of S 2p2/3 and 2p1/2 [ 28 ], respectively (see Figure 4 e,f), suggesting the presence of alunite/K-alum mixture [ 29 ]. In addition to this, as displayed in Figure 4 g, for Si 2p core-level spectrum with two peaks centered at 103.24 and 102.31 eV and O 1s spectra with BEs of 531 and 532.7 eV, which demonstrate that there SiO 2 states, as well as Si−OH, forms on the surface of SiO 2 [ 30 ].…”

Highly Stable Supercapacitor Devices Based on Three-Dimensional Bioderived Carbon Encapsulated g-C3N4 Nanosheets

“…First, the HR-XPS spectrum of C 1s of the pristine GCN sample, Figure 4a, shows two main peaks at 284.6 eV (ascribed to C−C bond) and a peak at 288.0 eV (attributed to C−NC). 30,44 The C 1s spectrum of the GCN/Bio-C20 composite, Figure 4b, is deconvoluted into three peaks. Besides the two peaks corresponded to C−C bond and C−NC bonds, the sp 2 hybridized carbon−nitrogen double bond appears at 287.7 eV, revealing the successful combination of biocarbon in the graphitic structure.…”

“…Also, the high-resolution spectra (HR-XPS) of the C 1s, N 1s, and O 1s emission lines are demonstrated in Figure a–f. First, the HR-XPS spectrum of C 1s of the pristine GCN sample, Figure a, shows two main peaks at 284.6 eV (ascribed to C–C bond) and a peak at 288.0 eV (attributed to C–NC). , The C 1s spectrum of the GCN/Bio-C20 composite, Figure b, is deconvoluted into three peaks. Besides the two peaks corresponded to C–C bond and C–NC bonds, the sp 2 hybridized carbon–nitrogen double bond appears at 287.7 eV, revealing the successful combination of biocarbon in the graphitic structure. , Figure c, d depicts the HR-XPS N 1s spectra of both pristine GCN and as-prepared GCN/Bio-C20 composite.…”

“…Synthesis of Active Materials. A facile one-pot method based on the thermal polymerization of urea was utilized for the synthesis of g-C 3 N 4 nanosheets according to the method reported by Hashem et al 30 Briefly, an appropriate amount of the extra-purified urea was placed in a porcelain crucible whose internal surface was covered with commercial aluminum foil as well as the whole reaction pot. This system was subject to annealing in air at 550 °C for 3 h using a muffle furnace with a heating rate of 10 °C/min.…”

Review and Perspective on Rational Design and Interface Engineering of g-C3N4/ZnO: From Type-II to Step-Scheme Heterojunctions for Photocatalytic Applications

“…The degradation mechanism furnishes adequate information on the participation of the free radicals, which indirectly provides evidence for the direction of charge carrier pathways in the heterojunction. The ascorbic acid (benzoquinone, acrylamide, l -carnosine, ferulic acid), CH 3 OH (IPA, TBA), K 2 Cr 2 O 7 (AgNO 3 , DMSO), ammonium oxalate (EDTA, triethanolamine, HCOOH, NaI, CH 3 I, citric acid), and NaN 3 ( l -histidine) are normally used as scavengers for superoxide radicals, hydroxyl radicals, photogenerated electrons, holes, and singlet oxygen, respectively. ,,,,,,,,,− All these radicals participate in the mineralization of pollutants, with the prime effects depending on the nature of the heterojunction, charge carrier transfer dynamics, and electron density distribution in the pollutant molecule (Table ). Wang et al suggested that holes and hydroxyl radicals dominate the degradation mechanism under UV and visible light, respectively.…”