Synthesis and photocatalytic hydrogen production of a novel photocatalyst LaCO3OH

Pan, Bao; Xie, Quanhua; Wang, Hemiao; Zhu, Jia; Zhang, Yongfan; Su, Wenyue; Wang, Xuxu

doi:10.1039/c3ta01553j

Cited by 61 publications

(25 citation statements)

References 38 publications

(37 reference statements)

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“…The P 2p spectrum exhibits the peaks at 131.5 eV and 135.3 eV corresponding to the states of phosphorus (Figure 3d). The C 1s spectrum (Figure 3e) exhibits the peaks at 286.1 eV and 284.6 eV, corresponding to the carbonate and carbon [27]. The peaks observed at 531.1 eV and 528.7 eV are ascribed to the 1s orbital of oxygen increasing LCO mass ratio in the APO/LCO composite.…”

Section: Structural Characterizationmentioning

confidence: 88%

“…This approach exploits the combination of a wide band gap semiconductor with a narrow band gap semiconductor and seeks to identify the parameters that affect the physicochemical properties as well as the photocatalytic activity. Since, both the conduction band minimum (CBM) and valence band maximum (VBM) of LaCO 3 OH are negative compared to those of Ag 3 PO 4 , various oxidation reactions can be initiated in the APO/LCO composite [27,28]. In addition, carbon based materials such as g-C 3 N 4 , graphene (GR) are also recognized as a large surface area materials with high electronic conductivity and with scope for tailored morphologies.…”

Section: Introductionmentioning

confidence: 99%

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Graphene-wrapped Ag 3 PO 4 /LaCO 3 OH heterostructures for water purification under visible light

Patil

Mali

Roy

et al. 2016

Journal of Energy Chemistry

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Section: Structural Characterizationmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Graphene-wrapped Ag 3 PO 4 /LaCO 3 OH heterostructures for water purification under visible light

Patil

Mali

Roy

et al. 2016

Journal of Energy Chemistry

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“…The α peak represents the composite catalysts material. The surface of the Co 3 O 4 is reduced to CoO, the beta peak represents independent Co 3 O 4 , and CoO is further reduced to Co 0 [33]. The peak position and peak area in the low temperature region indicate the oxygen activity and the active oxygen content of the composite catalyst.…”

Section: Reducibilitymentioning

confidence: 99%

“…Stoichiometric amounts of metal nitrates(La(NO 3 ) 3 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O)and citric acid were mixed in an aqueous solution .The solution was stirring at 80 • C until the formation of wet gel, and the wet gel let stand at room temperature for 24 h. The aged wet gel was dried overnight and crushed and calcinated in the muffle furnace at 700 • C for 5 h. As a catalytic activity comparison, LaCo 3 OH was synthesized by a one-step hydrothermal method, named as LCH [33].…”

Section: Catalyst Preparationmentioning

confidence: 99%

Active Component Migration and Catalytic Properties of Nitrogen Modified Composite Catalytic Materials

Peng

Zheng

et al. 2018

Catalysts

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During the catalytic combustion reaction of methane, the migration of the active species on surface facilitates the catalytic reaction, and the element doping can improve the redox performance of the catalyst. Nitrogen-modified perovskite type composite catalysts were prepared by hydrothermal method and then characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), temperature-programmed reductions (TPR), and X-ray photoelectron spectra (XPS). The results revealed that nitrogen sources (urea, biuret, melamine, carbohydrazide, and semicarbazide hydrochloride) and nitrogen source addition changed the catalytic performance in physical and chemical properties, the migration of reactive species and the catalytic performance. When the addition amount of semicarbazide hydrochloride was three times that of LaCoO 3 , the composite catalysts had high Co 3+ /Co 2+ (1.39) and O ads /O lat (15.18) and showed the best catalytic performance: the temperatures that are required for achieving methane conversion of 50% and 90% were 277 and 360 • C, which are more effective than noble metal oxides. Moreover, the in situ diffuse reflectance infrared fourier transform spectroscopy (DRIFTS) were applied to elucidate the efficient for CH 4 removal and also can further explain the surface reaction mechanism of the composite catalyst during the methane catalytic combustion.

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“…However, due to its relatively wide band gap (3.2 eV), TiO 2 only can be excited under UV irradiation which is only 4% of solar energy [7]. In recent years, efforts have been directed to the area of developing photocatalysts that are able to utilize visible light [8,9], which accounts for 43% of the total solar energy [7]. Generally, there are two main synthesis strategies for the preparation of visible-light sensitive photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

A Novel Delafossite Structured Visible-Light Sensitive AgFeO2 Photocatalyst: Preparation, Photocatalytic Properties, and Reaction Mechanism

Yin

Shi

et al. 2016

Catalysts

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Abstract:This work presents a systematic study of a novel efficient visible-light sensitive AgFeO 2 photocatalyst. The photocatalysts were prepared via simple hydrothermal procedure at 160˝C with different reaction time. The structures, morphologies, specific surface areas, and optical properties of the photocatalysts were explored by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Brunauer-Emmett-Teller (BET) model, and UV-vis diffuse reflectance spectra (DRS). Photoluminescence and photocurrent analysis were conducted for the understanding of photogenerated electron-hole pair separation. AgFeO 2 with a six-hour hydrothermal procedure demonstrated the most efficient photocatalytic performance which resulted in 97% degradation of methyl orange (MO) within 180 min. The enhanced photocatalytic activity was attributed to the combined effect of its relatively large surface area and high separation electron-hole pair efficiency. Holes and¨O 2´w ere the dominant reactive species responsible for MO degradation and holes played the leading role according to the quenching effects analysis and detection of active species. The conduction and valence band position of AgFeO 2 were calculated to be´0.5 V and 1.32 V, respectively. Based on active species detection, along with the band structure, the photocatalytic mechanism was proposed.

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Synthesis and photocatalytic hydrogen production of a novel photocatalyst LaCO3OH

Cited by 61 publications

References 38 publications

Graphene-wrapped Ag 3 PO 4 /LaCO 3 OH heterostructures for water purification under visible light

Graphene-wrapped Ag 3 PO 4 /LaCO 3 OH heterostructures for water purification under visible light

Active Component Migration and Catalytic Properties of Nitrogen Modified Composite Catalytic Materials

A Novel Delafossite Structured Visible-Light Sensitive AgFeO2 Photocatalyst: Preparation, Photocatalytic Properties, and Reaction Mechanism

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