Synthesis of visible light responsive ZnO–ZnS/C photocatalyst by simple carbothermal reduction

Ma, Hongchao; Han, Jihui; Fu, Yinghuan; Song, Yu; Yu, Chunling; Dong, Xiaoli

doi:10.1016/j.apcatb.2010.12.014

Cited by 107 publications

(30 citation statements)

References 30 publications

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“…However, the adsorption ability was preserved because PMMA acts as the major adsorption material towards MB. Carbon nitride is an organic semiconductor nanomaterial and so lower photocatalytic activity could not be caused by the photocorrosion of ECN like in the case of metal semiconductors such as ZnS and CdS [95,96]. However, after washing with 30% H2O2 and irradiating for 1 h, we can clearly see that the photocatalytic activity increased again, and it was similar to the photocatalytic activity…”

Section: Recyclability Studymentioning

confidence: 71%

Design and Performance of Novel Self-Cleaning g-C3N4/PMMA/PUR Membranes

et al. 2020

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In the majority of photocatalytic applications, the photocatalyst is dispersed as a suspension of nanoparticles. The suspension provides a higher surface for the photocatalytic reaction in respect to immobilized photocatalysts. However, this implies that recovery of the particles by filtration or centrifugation is needed to collect and regenerate the photocatalyst. This complicates the regeneration process and, at the same time, leads to material loss and potential toxicity. In this work, a new nanofibrous membrane, g-C 3 N 4 /PMMA/PUR, was prepared by the fixation of exfoliated g-C 3 N 4 to polyurethane nanofibers using thin layers of poly(methyl methacrylate) (PMMA). The optimal amount of PMMA was determined by measuring the adsorption and photocatalytic properties of g-C 3 N 4 /PMMA/PUR membranes (with a different PMMA content) in an aqueous solution of methylene blue. It was found that the prepared membranes were able to effectively adsorb and decompose methylene blue. On top of that, the membranes evinced a self-cleaning behavior, showing no coloration on their surfaces after contact with methylene blue, unlike in the case of unmodified fabric. After further treatment with H 2 O 2 , no decrease in photocatalytic activity was observed, indicating that the prepared membrane can also be easily regenerated. This study promises possibilities for the production of photocatalytic membranes and fabrics for both chemical and biological contaminant control.Polymers 2020, 12, 850 2 of 20 aqueous solutions [11][12][13][14]. Adsorption by activated carbon is the most used method of dye removal due to good removal efficiency of a wide variety of dyes. Performance is dependent on the type of carbon used and the characteristics of the wastewater. The removal rate can be improved using massive doses of activated carbon. However, the re-use of regenerated activated carbon results in a steep reduction in adsorption capacity and the efficiency of dye removal becomes unpredictable and dependent on massive doses of such re-used activated carbon. Activated carbon is also very expensive and its reactivation results in 10%-15% loss of the sorbent [15][16][17].A promising method in order to overcome issues such as limited sorption capacity and regeneration is the use of materials with photocatalytic activity. Carbon nitride (g-C 3 N 4 ) is a metal-free organic semiconductor. This material is an attractive candidate in the field of photocatalysis due to its chemical stability, non-toxicity, straightforward preparation procedure and ability to absorb light efficiently in the visible range due to a narrow band gap (2.7 eV) [18][19][20]. g-C 3 N 4 has been used in photocatalytic applications such as water splitting [21,22], the photocatalytic degradation of air pollutants, such as NOx [23,24], water pollutants such as the dyes, rhodamine B [25][26][27], methyl orange [28], and methylene blue [29][30][31], and other industrial pollutants such as antibiotics [32] or phenols [33][34][35]. In recent years, g-C 3 N 4 was also successfully tes...

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Section: Recyclability Studymentioning

confidence: 71%

Design and Performance of Novel Self-Cleaning g-C3N4/PMMA/PUR Membranes

et al. 2020

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“…Further, carbothermal reduction of NiO to Ni-rich vapor/ions takes place. Ma et al [43] have studied the carbothermal reduction of ZnO into Zn-rich vapors in the presence of carbon/ graphite at 900˚C temperature. Carbon/graphite in AC and enormous amount of heat present in the microwave oven becomes favorable for the carbothermal reduction of ZnO into Zn-rich vapors/ions.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Synergy effect in the photocatalytic degradation of textile dyeing waste water by using microwave combustion synthesized nickel oxide supported activated carbon

Suresh¹,

Vijaya²,

Balasubramaniam³

et al. 2014

Desalination and Water Treatment

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A B S T R A C TNickel oxide nanoparticles supported activated carbon (NSAC) photocatalyst was successfully prepared using a cost-effective microwave irradiation method. The earned UV lightsensitive NSAC composites were characterized using powder X-ray diffraction, Fourier transform infrared spectroscopy, High-resolution scanning electron microscope with energydispersive X-ray analysis, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller surface area analyzer. Optical properties of NSAC composites were investigated using UVVis diffuse reflectance spectroscopy and photoluminescence spectroscopy, which exposed prolonged light absorption in UV light region and hold better charge separation capability, respectively, as compared to pure NiO. The photocatalytic activity was tested by the degradation of textile dye waste water (TDW) under UV light irradiation. Chemical oxygen demand of TDW was calibrated before and after the photocatalysis experiment under UV light to evaluate the mineralization of wastewater. The results demonstrated that NSAC composites showed imposing photocatalytic enrichment over pure NiO. The coordinated blending of the oxygen vacant sites, structural defects of NiO along with electron transmission capacity, and presence of surface oxygen on AC has led to the lasting light absorption, delayed charge recombination, and sustenance, which favor the enrichment of the photocatalytic activity of NSAC.

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“…A similar binding energy is characteristic of the sulfur atoms in the sulfate group. For sulfur in the sulfide, the observed S2p 3/2 binding energy is 161.1-161.7 eV [14][15][16][17][18][19]. For sulfates and sulfites, the observed SiO 2 /CdS binding energy is sub stantially higher (from 168 to 170 eV) [20][21][22].…”

Section: Physicochemical Characteristics Of the Photocatalystsmentioning

confidence: 99%

Photoactivity of TiO2/CdS and SiO2/CdS hybrid nanostructured systems in the partial oxidation of ethanol under irradiation with visible light

et al. 2015

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The activity of hybrid nanostructured core-shell photocatalysts based on cadmium sulfide, tita nium dioxide, and silicon dioxide has been investigated in the partial oxidation of ethanol under irradiation with visible light. The SiO 2 /CdS and TiO 2 /CdS photocatalysts have been synthesized by the sol-gel method and have been characterized by a variety of physicochemical methods, including X ray diffraction, transmis sion electron microscopy, X ray photoelectron spectroscopy, and diffuse reflectance infrared Fourier trans form spectroscopy. The synthesized TiO 2 /CdS samples exhibit a high activity in the partial photocatalytic oxidation of ethanol to acetaldehyde under irradiation with visible light (λ > 420 nm) in a batch reactor. Their high activity can be due to heterojunctions occurring between cadmium sulfide and titanium dioxide nano particles and causing the separation of photogenerated charges.

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Synthesis of visible light responsive ZnO–ZnS/C photocatalyst by simple carbothermal reduction

Cited by 107 publications

References 30 publications

Design and Performance of Novel Self-Cleaning g-C3N4/PMMA/PUR Membranes

Design and Performance of Novel Self-Cleaning g-C3N4/PMMA/PUR Membranes

Synergy effect in the photocatalytic degradation of textile dyeing waste water by using microwave combustion synthesized nickel oxide supported activated carbon

Photoactivity of TiO2/CdS and SiO2/CdS hybrid nanostructured systems in the partial oxidation of ethanol under irradiation with visible light

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