Porous g-C₃N₄/TiO₂ foam photocatalytic filter for treating NO indoor gas

Abstract

A g-C3N4/TiO2 heterojunction functional foams were constructed as gas purification filter for treating NO indoor gas with high removal rate (> 65 %) and high stability under visible-light (λ ≥...

Highly Active Amino-Fullerene Derivative-Modified TiO2 for Enhancing Formaldehyde Degradation Efficiency under Solar-Light Irradiation

“…In the case of C60-EDA/TiO2 nanocomposites, N1s appeared in the XPS spectrum (Figure 2c), providing further evidence to the successfully introduce C60-EDA into the composite, which was consistent with TEM-EDS mapping results. At the same time, it can be observed that the positive displacement of Ti 2p binding energy of C60-EDA/TiO2 relative to that of TiO2 is 0.4 eV (Figure 2d), indicating that there is an electronic interaction between C60-EDA and TiO2 [45]. It is worth noting that compared with pristine C60-EDA, the binding energies of N-Hx (401.7 eV) and C-N (399.5 eV) in the N1s high-resolution spectra of C60-EDA/TiO2 (Figure S5) are positively shifted by 1.1 and 0.4 eV, respectively, which should be caused by the formation of N-O-Ti by the interaction of the amino groups on C60-EDA with the hydroxyl groups on the surface of TiO2 [16].…”

“…To further elucidate the interaction of C60-EDA and TiO2, Raman and XPS experiments measurements were carried out. As shown in Figure 2b, the peaks of C60-EDA/TiO2 at 144, 400, 515, and 636 cm −1 are the characteristic peaks of anatase TiO2 with Eg(1), B1g(1), A1g(1), B1g(2), and Eg(2) vibration modes [17,44,45]. The fullerene-related Raman peaks appear between 1200-1600 cm −1 , which corresponds to the two typical peaks of C60-EDA (located at 1397 and 1579 cm −1 ), indicating the non-ignorable bond interaction between C60-EDA and TiO2 [17].…”

The Collision between g‐C3N4 and QDs in the Fields of Energy and Environment: Synergistic Effects for Efficient Photocatalysis

“…Unlike calcination, the annealing reaction is carried out at a uniform cooling temperature on the basis of calcination. [77,78] In the fabrication of Co 3 O 4 QDs/g-C 3 N 4 , Zhang et al added Co 3 O 4 QDs suspension into ethanol solution dispersing g-C 3 N 4 . [78] Then the mixture was obtained by solvent evaporation with constant stirring at 100 °C and annealed at different temperatures (180, 250, 300 °C) in 2 h. Interestingly, the author pointed that the small pores were produced around Co 3 O 4 QDs, which indicated strong interactions between Co 3 O 4 QDs and g-C 3 N 4 .…”

“…In order to improve the removal of NO, Xiong et al suggested a combination of g-C 3 N 4 QDs with TiO 2 QDs using a pyrolysis process to construct a functional heterojunction foams filters, which displayed a higher photocatalytic activity for NO oxidation (65%). [77] The author pointed out that a large amount of NO was absorbed and a high light utilization efficiency was achieved on account of the large specific surface area and continuous pores in unique foams (Figure 20C,D). Moreover, all the samples possessed very low NO 2 concentration (<5 ppb) profiles during the photocatalytic NO oxidation process, successfully avoiding the harm of byproduct.…”

Promising Sustainable Models Toward Water, Air, and Solid Sustainable Management in the View of SDGs

“…4). The photocatalytic house can participate in converting NO x gasses to nitrate anions, which are easily removed from the adsorbent surface of the photocatalyst by washing off (Nguyen et al 2020;Xiong et al 2021). Consequently, NO 3 − anions convert to ammonia via direct photocatalysis or electrochemical catalysis which may be renewably obtained from available and cheap photovoltaic panels (Hirakawa et al 2017;Li et al 2020).…”