Coupling of Ag2CO3 to an optimized ZnO photocatalyst: Advantages vs. disadvantages

Sánchez‐Cid, Pablo; Jaramillo-Páez, C.; Navı́o, J.A.; Martín-Gómez, A.N.; Hidalgo, M.C.

doi:10.1016/j.jphotochem.2018.10.024

Cited by 41 publications

(10 citation statements)

References 61 publications

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“…The ZnO-based materials have many applications in industries, for example, rubbers, ceramics, pharmaceuticals, agricultural servants, paints, cosmetics, and photocatalysts [4][5][6][7][8][9][10]. Besides the advantages of this material due to the high electron aperture rate and low charge separation efficiency [11], the pure ZnO often exhibits relatively low photocatalytic activity under visible light irradiation, and therefore, ZnO does not meet the requirements of a photocatalyst when applied to practical processes [3,12,13]. That is why the enhanced catalytic activity of ZnO in visible light by doping other elements is a great concern to scientists.…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation of ZnO Nanoparticles and Ag/ZnO Nanocomposite and Their Photocatalytic Activities under Visible Light

Pham

Tran

et al. 2020

International Journal of Photoenergy

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Zinc oxide (ZnO) has been known as an excellent photocatalyst for the degradation of a variety of organic pollutants under UV irradiation. This work describes a synthesis of ZnO nanoparticles via a facile precipitation method, and Ag was doped into Ag/ZnO nanocomposite to improve the photocatalytic degradation of BPA under visible light irradiation. The obtained ZnO nanoparticles were 20 nm in size and had a relatively high surface area and pore volume, 26.2 m2/g and 0.48 cm3/g, respectively. The deposition of Ag led to a decrease in the surface area, pore volume, and band gap energy ( E g ) of ZnO nanoparticles. However, the photocatalytic activity of Ag/ZnO composite in the case increased. The performance of ZnO was compared with Ag/ZnO composites at the different molar ratios, and the kinetic reaction of BPA in these catalysts was investigated by the first-order kinetic model. The sample of Ag/ZnO-10 composite had the highest catalytic activity and showed the degradation efficiency, reaction rate, and degradation capacity of 100% in 120 min, 0.014 min-1, and 40 mg/g, respectively. In comparison, the effects of Ag/ZnO molar ratio, catalyst dosage, solution pH, and concentration of BPA on photocatalytic degradation were investigated. Additionally, the photocatalytic performance of Ag/ZnO-10 composite was evaluated by the degradation of other persistent organic compounds such as phenol, tartrazine, and methylene blue and compared to other catalysts in literature.

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Section: Introductionmentioning

confidence: 99%

Facile Preparation of ZnO Nanoparticles and Ag/ZnO Nanocomposite and Their Photocatalytic Activities under Visible Light

Pham

Tran

et al. 2020

International Journal of Photoenergy

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“…Details and experimental conditions are reported in the following references. [19,20]. In summary, 100 mg of photo-catalyst was added to 100 mL of substrate solution (10 ppm RhB, 20 ppm MO or 10 ppm CAFA) under constant bubbling of air to keep the reaction mixture homogenous.…”

Section: Photocatalytic Activity Testsmentioning

confidence: 99%

Boosting the photocatalytic properties of NaTaO3 by coupling with AgBr

Puga

Navı́o

Hidalgo

2022

Photochem Photobiol Sci

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AgBr/NaTaO3 composites, with different molar % of NaTaO3 (Br/NTO(X%)), have been synthesized by simple precipitation methods; bare NaTaO3 was synthesized by hydrothermal procedure, while AgBr was synthesized by a precipitation procedure using cetyl-tri-methyl-ammonium bromide (CTAB) and AgNO3. Samples have been characterized by X-ray diffraction (XRD), N2 adsorption, UV–vis diffuse reflectance spectroscopy (DRS), Fourier-transform infrared spectroscopy (FT-IR), Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Photocatalytic activity of the as-prepared photo-catalysts was evaluated through photocatalytic degradation of rhodamine B (RhB), methyl orange (MO) and caffeic acid (CAFA) under UV and visible illumination. Single AgBr material and Br/NTO(X%) composites displayed the ability to absorb light in the visible region, while NaTaO3 is only photoactive under UV irradiation. Based on the position of conduction and valence bands of AgBr and NaTaO3, the heterojunction between these two photo-catalysts corresponds to a type II junction. In the case of photocatalytic degradation of RhB and CAFA, Br/NTO(x%) composites have highest photocatalytic activity than that obtained by both parental materials under the same operational conditions. AgBr and Br/NTO(x%) composites achieve a fast degradation of MO, together with a considerable adsorption capacity, attributed to the presence of a remaining amount of residual CTAB on the AgBr surface. In summary, coupling AgBr with NaTaO3 improves the photocatalytic activity under both UV and visible illumination with respect to the parental components, but the performance of the composites is highly dependent on the type of substrate to be degraded and the illumination conditions.

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“…[ 1–3 ] The photocatalytic performance of single photocatalysts has some disadvantages, such as activation under visible light, rapid charge recombination, and deficiency of active sites, which limit their applications. [ 4,5 ] Hence, the synthesis of suitable heterostructure photocatalysts has emerged as an attractive means to overcome these deficiencies. In the past decade, different strategies have been explored to suppress charge recombination and increase the performance of the photocatalysts, including metal loading, [ 6 ] element doping, [ 7 ] and heterojunctions [ 8 ] or Z‐scheme photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Novel CoFe₂O₄/CuBi₂O₄ heterojunction p–n semiconductor as visible‐light‐driven nanophotocatalyst for C (OH)–H bond activation

Ghobadifard

Radovanovic

Mohebbi

2022

Applied Organom Chemis

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Nanosized CoFe2O4/CuBi2O4 heterostructure was obtained by solvent‐free thermal processing and was characterized using a series of structural, physicochemical, and analytical techniques. The CuBi2O4 and CoFe2O4 nanoparticles demonstrated poor photoactivity due to their fast charge recombination and negligible visible light absorptivity, respectively. In contrast, the prepared heterojunction CoFe2O4/CuBi2O4 nanocomposite consisting of an array of nanocolumns approximately 20 nm in width displayed nearly twofold higher photocatalytic activity than CoFe2O4 or CuBi2O4 nanostructures alone toward the C (OH)–H bond activation. This nanocomposite exhibits photocatalytic efficiency as high as 98% with very high stability. The increased photocatalytic reactivity could be related to the effective Z‐scheme mechanism of photogenerated charge carrier separation between CoFe2O4 and CuBi2O4 in the nanocomposite, which reduces the electron–hole recombination. The results of this work provide a promising approach to the design and preparation of heterostructured photocatalysts for oxidation reactions.

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Coupling of Ag2CO3 to an optimized ZnO photocatalyst: Advantages vs. disadvantages

Cited by 41 publications

References 61 publications

Facile Preparation of ZnO Nanoparticles and Ag/ZnO Nanocomposite and Their Photocatalytic Activities under Visible Light

Facile Preparation of ZnO Nanoparticles and Ag/ZnO Nanocomposite and Their Photocatalytic Activities under Visible Light

Boosting the photocatalytic properties of NaTaO3 by coupling with AgBr

Novel CoFe₂O₄/CuBi₂O₄ heterojunction p–n semiconductor as visible‐light‐driven nanophotocatalyst for C (OH)–H bond activation

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Coupling of Ag2CO3 to an optimized ZnO photocatalyst: Advantages vs. disadvantages

Cited by 41 publications

References 61 publications

Facile Preparation of ZnO Nanoparticles and Ag/ZnO Nanocomposite and Their Photocatalytic Activities under Visible Light

Facile Preparation of ZnO Nanoparticles and Ag/ZnO Nanocomposite and Their Photocatalytic Activities under Visible Light

Boosting the photocatalytic properties of NaTaO3 by coupling with AgBr

Novel CoFe2O4/CuBi2O4 heterojunction p–n semiconductor as visible‐light‐driven nanophotocatalyst for C (OH)–H bond activation

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Product

Resources

About

Novel CoFe₂O₄/CuBi₂O₄ heterojunction p–n semiconductor as visible‐light‐driven nanophotocatalyst for C (OH)–H bond activation