Heterostructure Cu2O/(001)TiO2 Effected on Photocatalytic Degradation of Ammonia of Livestock Houses

Abstract

In this paper, a heterogeneous composite catalyst Cu2O/(001)TiO2 was prepared by the impregnation-reduction method. The crystal form, highly active facet content, morphology, optical properties, and the photogenerated electron-hole recombination rate of the as-prepared catalysts were investigated. The performance of Cu2O/(001)TiO2 was appraised by photocatalytic degradation of ammonia under sunlight and was compared with lone P25, Cu2O, and (001)TiO2 at the same reaction conditions. The results showed that 80% of the ammonia concentration (120 ± 3 ppm) was removed by Cu2O/(001)TiO2, which was a higher degradation rate than that of pure P25 (12%), Cu2O (12%), and (001)TiO2 (15%) during 120 min of reaction time. The reason may be due to the compound’s (Cu2O/(001)TiO2) highly active (001) facets content that increased by 8.2% and the band gap width decreasing by 1.02 eV. It was also found that the air flow impacts the photocatalytic degradation of ammonia. Therefore, learning how to maintain the degradation effect of Cu2O/(001)TiO2 with ammonia will be important in future practical applications.

Antimicrobial Properties of TiO2 Microparticles Coated with Ca- and Cu-Based Composite Layers

“…The X-ray diffractogram of the S2 sample (Figure 4) confirms the presence of rutile as the dominant crystalline phase. Thus, the most intense diffraction peaks located at 2θ = 27.2, 36.02, 41.2, 44.06, 56.47, and 69.01 corresponded to TiO2 as the rutile phase [19] while the peaks located at 2θ = 29.2 and 38.8 suggest the presence of Cu2O and CuO [20]. The other three peaks from 2θ = 11.06, 22.54, and 30.9 are attributed to the hydrocalumite structure.…”

“…Binding energy (eV) The XPS spectra for O 1s exhibited three peaks centered at around 529, 531, and 535.4 eV. The first peak was attributed to O 2− from titanium and copper oxides (529 eV) [1,2,20,21], the second to calcium oxide (531 eV) [22,23], and the last to water oxygen species from the surface. Decreases in the intensity of all the peaks and a shift towards higher binding energy values were observed for the S2 sample.…”

The Influence of Photocatalytic Reactors Design and Operating Parameters on the Wastewater Organic Pollutants Removal—A Mini-Review

“…The light source is an important parameter to be considered when designing the photoreactor. The light intensity, spectral range and radiation source position in the photocatalytic set-up have a significant influence on the overall pollutant removal efficiency [55,56]. Excepting the case when the sunlight is directly use for photocatalyst excitation, all the artificial light sources must be configured based on uniform photons distribution and process energy sustainability.…”

Photocatalytic Platforms for Removal of Ammonia from Gaseous and Aqueous Matrixes: Status and Challenges

“…185,194,195 Although the pristine form of anatase usually consists of thermodynamically stable ( 101) facets (surface energy of 0.44 J m −2 ), 150 recent studies indicate that slight modification of the synthesis procedure for anatase TiO 2 particles with high energy (001) facets (surface energy of 0.9 J m −2 ) can achieve enhanced catalytic properties. 196−198 A Cu 2 O/(001) TiO 2 -polyester fiber cotton composite catalyst was identified as a prominent photocatalyst for NH 3 (g) under simulated solar light (QY of 2.15 × 10 −04 molecules photon −1 and SY of 1.19 × 10 −06 molecules photon −1 mg −1 ) 185 (Table 1). The Cu 2 O/(001) TiO 2 -polyester fiber cotton composite catalyst maintained an NH 3 degradation rate of ∼60% after three regeneration cycles.…”

“…The Cu 2 O/(001) TiO 2 -polyester fiber cotton composite catalyst maintained an NH 3 degradation rate of ∼60% after three regeneration cycles. 185…”