Visible light active photocatalysis on block copolymer induced strings of ZnO nanoparticles doped with carbon

Kochuveedu, Saji Thomas; Jang, Yoon Hee; Jang, Yu Jin; Kim, Dong Ha

doi:10.1039/c2ta00263a

Cited by 77 publications

(57 citation statements)

References 47 publications

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“…Furthermore, in some cases, ZnO displays dramatically impressive photo-catalytic activities compared with broadly studied TiO 2 [88,91,[151][152][153][154][155][156][157][158][159][160]. In addition, element doping including both metal and nonmetal (C, N, S) doping could lead to an enhanced photo-catalytic activity; interestingly, most non-metal dopings were reported in photo-catalytic water splitting [161][162][163][164][165][166][167][168].…”

Section: Applications To Photo-catalysismentioning

confidence: 99%

The Applications of Morphology Controlled ZnO in Catalysis

et al. 2016

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Zinc oxide (ZnO), with the unique chemical and physical properties of high chemical stability, broad radiation absorption range, high electrochemical coupling coefficient, and high photo-stability, is an attractive multifunctional material which has promoted great interest in many fields. What is more, its properties can be tuned by controllable synthesized morphologies. Therefore, after the success of the abundant morphology controllable synthesis, both the morphology-dependent ZnO properties and their related applications have been extensively investigated. This review concentrates on the properties of morphology-dependent ZnO and their applications in catalysis, mainly involved reactions on green energy and environmental issues, such as CO 2 hydrogenation to fuels, methanol steam reforming to generate H 2 , bio-diesel production, pollutant photo-degradation, etc. The impressive catalytic properties of ZnO are associated with morphology tuned specific microstructures, defects or abilities of electron transportation, etc. The main morphology-dependent promotion mechanisms are discussed and summarized.

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Section: Applications To Photo-catalysismentioning

confidence: 99%

The Applications of Morphology Controlled ZnO in Catalysis

et al. 2016

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“…[17,18] To evaluate the capability to removal of MB pollutant from water, the adsorption performance of different samples were first carried out in dark room.…”

Section: Removal Of Methyl Blue From Watermentioning

confidence: 99%

“…[14][15][16] Similarly, porous carbon-doped ZnO composite also exhibited a good photocatalytic performance in terms of the degradation of organic pollutants under visible light. [17,18] However, the components in these porous carbon-metal oxide composites usually cannot achieve homogeneous dispersion since they were frequently prepared by mechanical or physical mixing the metal oxides with the porous carbon materials. More recently, metal 4 organic frameworks (MOFs) (including Zeolitic Imidazolate Frameworks (ZIFs)), a new class of inorganic-organic crystalline nanoporous materials that assembled from metal ions coordinated to rigid organic ligands, [19,20] have emerged as promising precursors or sacrificial templates for the preparation of porous carbon based materials, [21,22] due to their tuneable structures, vast functionalities and fascinating properties.…”

Section: Introductionmentioning

confidence: 99%

Atomically homogeneous dispersed ZnO/N-doped nanoporous carbon composites with enhanced CO2 uptake capacities and high efficient organic pollutants removal from water

Chen

Kong

et al. 2015

Carbon

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Advanced functional composite of ZnO nanoparticles embedded in N-doped nanoporous carbons has been synthesized by a simple one-step carbonization of zeolitic imidazolate framework-8 under a water stream atmosphere. A variety of characterization techniques show that the introduction of water steam during the carbonization process holds the key to obtain the fine and homogeneously dispersed ZnO nanoparticles within the functionalised nanoporous carbon matrix. Possessing a higher specific surface area, a larger pore volume and abundant oxygen-containing hydrophilic functional groups, the resulting composite exhibits a stronger interaction with CO 2 and is more efficient to promote the photocatalytic degradation-adsorption of methylene blue under visible light than the composite obtained without steam treatment. As a result, the steam derived composite exhibits increased CO 2 uptake capacity and excellent methylene blue molecules removal from water. Using different metal-organic frameworks as precursors, this new, simple and green method can be further expanded to generate various new homogeneous dispersed functional metal oxide/porous carbon composites with high efficient in relevant applications.

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“…ZnO is an important semiconductor material for its excellent optical property and high electron mobility [1], which has been extensively studied in a variety of fields, such as photocatalysis [2,3], solar cells [4,5], gas sensors [6][7][8] and optoelectronic devices [9,10]. Photoelectric response, a basic research for these fields mentioned above, has also been widely investigated.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and different photoelectric responses of nanocrystalline ZnO film irradiated with UV and white light in dry air

et al. 2015

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In this paper, nanocrystalline ZnO film with porous structure was successfully prepared on alumina substrate by the technology of screen printing and the subsequent heat treatment. The fundamental characteristics of the as-prepared sample were examined through XRD, FE-SEM, EDX and PL spectra measurements. Meanwhile, photoelectric responses of it were tested under UV and white light irradiation, respectively. Different photocurrent curves were obtained. Under UV light, the photocurrent with comparatively high amplitude of each cycle could mostly recover upon the light off. While for white light, the photocurrent with low amplitude just partially recovered when the light was turned off. This phenomenon indicated that, after the white light off, a large number of free electrons still remained within the materials. To calculate the amount of the remained free electrons, three photocurrent parameters, which are related to the density of free electrons in ZnO, were defined for the first time. Furthermore, the explanations for the different photoelectric responses of ZnO based on the double Schottky barrier model were also proposed.

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Visible light active photocatalysis on block copolymer induced strings of ZnO nanoparticles doped with carbon

Cited by 77 publications

References 47 publications

The Applications of Morphology Controlled ZnO in Catalysis

The Applications of Morphology Controlled ZnO in Catalysis

Atomically homogeneous dispersed ZnO/N-doped nanoporous carbon composites with enhanced CO2 uptake capacities and high efficient organic pollutants removal from water

Fabrication and different photoelectric responses of nanocrystalline ZnO film irradiated with UV and white light in dry air

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