Au nanoparticles enhanced rutile TiO2 nanorod bundles with high visible-light photocatalytic performance for NO oxidation

Zhang, Dieqing; Wen, Meicheng; Zhang, Shanshan; Liu, Peijue; Wang, Zhu; Li, Guisheng; Li, Hexing

doi:10.1016/j.apcatb.2013.09.042

Cited by 123 publications

(64 citation statements)

References 37 publications

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“…As an alternative to conventional approaches (selective catalytic reduction and wet scrubbing, etc.) with high cost adopted for high-concentration NO x treatment [7], semiconductor photocatalysis has gained considerable attention not only because of its potential value in addressing the worldwide energy shortage, but also because of its eco-friendly merit and high efficiency for the remediation of NO x at part-per-billion (ppb) levels [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Bi2O2CO3/g-C3N4 heterojunctions for efficiently photocatalytic NO in air removal: In-situ self-sacrificial synthesis, characterizations and mechanistic study

Wang

Huang

et al. 2016

Applied Catalysis B: Environmental

218

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2Graphical Abstract 3 Highlights 1. Bi 2 O 2 CO 3 /g-C 3 N 4 heterojunctions were fabricated via a self-sacrificial route.2. The heterojunctions exhibit superior photocatalytic NO removal efficiency.3. Structural evolution and synergistic catalytic mechanisms were investigated.4. This study provides a new route for C 3 N 4 -based carbonate composites fabrication. 4 AbstractLayer-structured Bi 2 O 2 CO 3 /g-C 3 N 4 heterojunction photocatalysts were successfully prepared via one-pot hydrothermal method for the first time, in which graphitic carbon nitride (g-C 3 N 4 ) served as the self-sacrificial reagent to supply carbonate anions simultaneously. Our results showed that the in situ fabricated Bi 2 O 2 CO 3 /g-C 3 N 4 heterojunction exhibited superior visible-light-driven photocatalytic activity for NO photocatalytic oxidation, which can be ascribed to the morphology and structure modulation during the sacrificial synthesis processes. Heterojunctions formation pathways underlying temperature-and time-dependent structure evolution were discussed in detail. The sample fabricated at 160 °C for 12 h (BOC-CN-160) showed high stability and durability, and the highest NO removal rate which is up to 34.8% under visible light irradiation. Results from photocurrent tests and electrochemical impedance spectroscopy (EIS) demonstrated that the BOC-CN-160 sample presents much more effective interface charge separation efficiency, which can contribute to its remarkably improved photocatalytic performance. Reactive radicals during the photocatalysis processes were identified by electron spin resonance (ESR) study. Combined with the quantification of reaction intermediates, the photocatalytic degradation mechanism of NO over Bi 2 O 2 CO 3 /g-C 3 N 4 heterojunction photocatalyst was proposed. The novel approach developed in this study may be further extended to synthesize a series of novel and highly efficient g-C 3 N 4 -based carbonate heterojunction photocatalysts for visible light-harvesting and energy conversion applications. 5

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Section: Introductionmentioning

confidence: 99%

Fabrication of Bi2O2CO3/g-C3N4 heterojunctions for efficiently photocatalytic NO in air removal: In-situ self-sacrificial synthesis, characterizations and mechanistic study

Wang

Huang

et al. 2016

Applied Catalysis B: Environmental

218

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“…In recent years, many studies have focused on the improvement of the photoactivity of rutile TiO 2 under visible irradiation. Hence, in order to obtain visible-lightsensitized rutile TiO 2 , TiO 2 was modified with metals and/ or nonmetals [10,[14][15][16][17], or new synthesis methods were developed to produce particles with different structural and morphological properties [8,9,11,18]. Since the crystallite phase, shape, size, specific surface area, and optical properties highly influence its catalytic performances, it is important to synthesize a catalyst with characteristic properties that leads to high photoactivity.…”

Section: Introductionmentioning

confidence: 99%

“…There are several studies that examined the photocatalytic performance of rutile TiO 2 under visible light illumination [8,9,11,14,16]. However, to the best of our knowledge, there are no studies reported in regard to the visible light photocatalytic degradation of terephthalic acid (TPA), which is a raw material for the manufacture of polyester fibers and films and is produced in millions of tons all over the world [31].…”

Section: Introductionmentioning

confidence: 99%

Visible light photocatalytic activity of rutile TiO2 fiber clusters in the degradation of terephthalic acid

Yener

Helvacı

2015

Appl. Phys. A

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Rutile TiO 2 nanoparticles, in different structural and morphological properties, were produced by the hydrolysis of titanium tetrachloride in a highly acidic reaction media at moderate temperatures without calcination. Their photocatalytic activities were investigated in the liquid-phase degradation of terephthalic acid under visible light illumination. The parameters, which are the concentration of the titanium tetrachloride solution (0.1-1 M) and reaction temperature (60-95°C), effective on the properties of the particles, and their photocatalytic performances, were investigated. The XRD patterns indicated a pure rutile crystal structure at moderate temperatures without need of calcination. The FEGSEM images showed the formation of flower-, pinecone-, and sphere-like clusters consisting of interconnected nanofibers. The N 2 adsorption-desorption isotherms pointed out the microporous structure of the clusters. Band gap energies were found to be varying between 3.02 and 3.08 eV due to the well-developed rutile crystallite structure. Systematic studies elucidated that the optimum reactant concentration and reaction temperature are 0.5 M TiCl 4 and 95°C, respectively. The rutile clusters synthesized at the optimum reaction conditions exhibited 99 % of the photocatalytic degradation of TPA under visible light illumination at shorter irradiation times compared with commercial P25 TiO 2 .

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“…In particularly, nanoparticles (NPs) of noble metals can strongly absorb visible light because of surface plasmon resonance, which greatly enhances the overall photocatalytic efficiency at the interface between the metal and the semiconductor [5][6][7][8][9][10][11]. Many plasmonic photocatalysts have been developed based on this phenomenon using a combination of Ag or Au NPs and semiconductor [3,[11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Characterization and photostability of Cu2O–Ag–AgBr/Al2O3 for the degradation of toxic pollutants with visible-light irradiation

Zhou

Wang

et al. 2014

Applied Catalysis B: Environmental

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a b s t r a c tA plasmonic photocatalyst Cu 2 O-Ag-AgBr supported on mesoporous alumina (Cu 2 O-Ag-AgBr/Al 2 O 3 ) was prepared by deposition-precipitation methods. The samples were characterized by means of X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The results indicated that Cu 2 O-Ag-AgBr nanojunctions were formed by the contact of Cu 2 O, AgBr and Ag with each other. The catalyst showed high photocatalytic activity and stability for the degradation of toxic persistent organic pollutants under visible light irradiation. The release of metal ions from the catalyst was significantly inhibited during the photodegradation of pollutants. Four interfacial electron transfer process were verified in the photoreaction system of Cu 2 O-Ag-AgBr/Al 2 O 3 on the basis of electron spin resonance and cyclic voltammetry analyses under a variety of experimental conditions. The results indicated that the coupling of Cu 2 O with Ag NPs and AgBr not only accelerated interfacial electron transfer processes, leading to the fast photoreduction of the dissolved Ag + and the photostability of Cu 2 O. These findings could be useful for the practical application of plasmonic visible light photocatalyst and photovoltaic fuel cells.

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Au nanoparticles enhanced rutile TiO2 nanorod bundles with high visible-light photocatalytic performance for NO oxidation

Cited by 123 publications

References 37 publications

Fabrication of Bi2O2CO3/g-C3N4 heterojunctions for efficiently photocatalytic NO in air removal: In-situ self-sacrificial synthesis, characterizations and mechanistic study

Fabrication of Bi2O2CO3/g-C3N4 heterojunctions for efficiently photocatalytic NO in air removal: In-situ self-sacrificial synthesis, characterizations and mechanistic study

Visible light photocatalytic activity of rutile TiO2 fiber clusters in the degradation of terephthalic acid

Characterization and photostability of Cu2O–Ag–AgBr/Al2O3 for the degradation of toxic pollutants with visible-light irradiation

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