Construction of g-C 3 N 4 /CeO 2 /ZnO ternary photocatalysts with enhanced photocatalytic performance

Yuan, Yuan; Huang, Gui‐Fang; Hu, Wangyu; Xiong, Dan-Ni; Zhou, Bing‐Xin; Chang, Shengli; Huang, Wei‐Qing

doi:10.1016/j.jpcs.2017.02.015

Cited by 140 publications

(36 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…So far, transition metal sulfide semiconductors such as CdS, MoS 2 , and WS 2 have achieved much attention because of their narrow bandgap and their ability to separate charges under the visible light [24][25][26][27][28] . MoS 2 with a 2D layered structure and a narrow bandgap of 2 eV is capable to absorb noticeable amount of light, with excellent thermal and chemical stability.…”

mentioning

confidence: 99%

Developing the Ternary ZnO Doped MoS2 Nanostructures Grafted on CNT and Reduced Graphene Oxide (RGO) for Photocatalytic Degradation of Aniline

Ghasemipour

Fattahi

Rasekh

et al. 2020

Sci Rep

157

View full text Add to dashboard Cite

Transition metal sulfide semiconductors have achieved significant attention in the field of photocatalysis and degradation of pollutants. MoS 2 with a two dimensional (2D) layered structure, a narrow bandgap and the ability of getting excited while being exposed to visible light, has demonstrated great potential in visible-light-driven photocatalysts. However, it possesses fast-paced recombination of charges. in this study, the coupled MoS 2 nanosheets were synthesized with Zno nanorods to develop the heterojunctions photocatalyst in order to obtain superior photoactivity. the charge transfer in this composite is not adequate to achieve desirable activity. therefore, heterojunction was modified by reduced graphene oxide (RGO) nanosheets and carbon nanotubes (cnts) to develop the RGo/Zno/MoS 2 and cnts/Zno/MoS 2 ternary nanocomposites. the structure, morphology, composition, optical and photocatalytic properties of the as-fabricated samples were characterized through X-ray diffraction (XRD), Fourier Transform Infrared (FTIR), Field Emission Scanning electron Microscopy (feSeM), transmission electron Microscopy (teM), energy-Dispersive X-ray (eDX), elemental mapping, photoluminescence (pL), Ultraviolet-Visible spectroscopy (UV-ViS), and Brunauer-emmett-teller (Bet) techniques. the photo-catalytic performance of all samples was evaluated through photodegradation of aniline in aqueous solution. the combination of RGo or cnts into the Zno/MoS 2 greatly promoted the catalytic activity. However, the resulting RGo/Zno/MoS 2 ternary nanocomposites showed appreciably increased catalytic performance, faster than that of cnts/Zno/MoS 2. charge carrier transfer studies, the Bet surface area analysis, and the optical studies confirmed this superiority. The role of operational variables namely, solution pH, catalyst dosage amount, and initial concentration of aniline was then investigated for obtaining maximum degradation. complete degradation was observed, in the case of pH = 4, catalyst dosage of 0.7 g/L and aniline concentration of 80 ppm, and light intensity of 100 W. According to the results of trapping experiments, hydroxyl radical was found to be the main active species in the photocatalytic reaction. Meanwhile, a plausible mechanism was proposed for describing the degradation of aniline upon ternary composite. Moreover, the catalyst showed excellent reusability and stability after five consecutive cycles due to the synergistic effect between its components. Total-Organic-Carbon concentration (TOC) results suggested that complete mineralization of aniline occurred after 210 min of irradiation. Finally, a real petrochemical wastewater sample was evaluated for testing the catalytic ability of the as-fabricated composites in real case studies and it was observed that the process successfully quenched 100% and 93% of Chemical Oxygen Demand (COD) and TOC in the wastewater, respectively.

show abstract

mentioning

confidence: 99%

Developing the Ternary ZnO Doped MoS2 Nanostructures Grafted on CNT and Reduced Graphene Oxide (RGO) for Photocatalytic Degradation of Aniline

Ghasemipour

Fattahi

Rasekh

et al. 2020

Sci Rep

157

View full text Add to dashboard Cite

show abstract

“…Stacking layered materials can tune their optoelectronic properties and expand their application, such as extending their absorption edge to the longer wavelengths and enhancing their solar energy conversion. For photocatalysis, enhancing the light harvesting is an important issue for designing photocatalysts . It has been demonstrated that many wide‐bandgap semiconductors (e.g., TiO 2 , and SnO 2 ) can extend their absorption edge by coupling with the layered TMDs .…”

Section: Resultsmentioning

confidence: 99%

Insights Into Interfacial Interaction and Its Influence on the Electronic and Optical Properties of Two‐Dimensional WS₂/TX₂CO₂ (TX = Ti, Zr) van der Waals Heterostructures

Ma¹,

Wu²,

Huang³

et al. 2018

Physica Status Solidi (b)

Self Cite

View full text Add to dashboard Cite

Two‐dimensional (2D) transition metal dichalcogenides (TMDs), carbides (MXenes), and their heterostructures showcase several key properties that can address emerging energy needs, in particular for solar energy conversion and storage devices. Understanding the fundamental science of these heterostructures is paramount to designing them with desirable properties. Using a detailed theoretical study of 2D WS2/TX2CO2 (TX = Ti, Zr) van der Waals heterostructure, as a typical case, based on density functional theory, we firstly reveal that the interfacial interaction is mainly dependent on their stacking configuration and/or TX atom. Compared to that of individual, the band gap of heterostructure is obviously reduced. The strong absorption in the ultraviolet and visible‐light region, the type‐II staggered band alignment at the interface make the 2D WS2/TX2CO2 heterostructures promising candidates for photocatalysis, photodetector, and solar energy harvesting and conversion. Moreover, these heterostructures can also be effective solar cell materials with theoretical power conversion efficiency up to 11.30%, suggesting that they are potential candidates for solar energy conversion. This work provides the insight into the interfacial interaction and its effects, and can facilitate the applications of TMDs and MXenes.

show abstract

“…Another widely used photocatalyst, ZnO, has the appropriate features of chemically and structurally stable, eco‐friendly nature, low cost, suitable quantum efficiency, and acceptable mobility of the charge carriers. It seems that combining ZnO particles, as the third component of the hetero‐structural composite, with Ag 3 PO 4 ‐WO 3 is a feasible strategy for further improvement of chemical and structural properties and for promotion of photocatalytic activity by the induced inter‐site charge transfer …”

Section: Introductionmentioning

confidence: 99%

“…It seems that combining ZnO particles, as the third component of the hetero-structural composite, with Ag 3 PO 4 -WO 3 is a feasible strategy for further improvement of chemical and structural properties and for promotion of photocatalytic activity by the induced inter-site charge transfer. 41,42 Recently, various ternary photocatalysts containing Ag 3 PO 4 , ZnO, and WO 3 have been constructed and applied for different photocatalytic applications. Attapulgite-TiO 2 -Ag 3 PO 4 is one of ternary photocatalyst containing Ag 3 PO 4 that was used for photocatalytic degradation of Rhodamin B under simulated solar light.…”

Section: Introductionmentioning

confidence: 99%

Application of mixture experimental design for photocatalytic ammonia degradation by sunlight‐driven WO ₃ ‐Ag ₃ PO ₄ ‐ZnO ternary photocatalysts

2019

View full text Add to dashboard Cite

Summary Using statistical mixture design, the best composition of a heterojunction photocatalyst containing ZnO, Ag3PO4, and WO3 was determined to maximize the sunlight driven ammonia removal from aqueous solution via both photocatalysis and adsorption processes. All samples were prepared by coprecipitation and immobilized over perlite granules as floatable support. X‐ray diffraction (XRD), Fourier‐transform infrared (FTIR), field emission scanning electron microscope (FESEM), Brunauer, Emmett, and Teller (BET), ultraviolet–visible (UV‐vis), and photoluminescence (PL) analyses were used to characterize the catalysts. Three responses of ammonia removal by photocatalysis, adsorption, and the total ammonia removal were modeled by special cubic models, and the ANOVA confirmed the significance of them. The maximum ammonia removal, approximately 88%, was obtained by photocatalyst composed of 32.93‐wt% WO3, 41.82‐wt% Ag3PO4, and 25.26‐wt% ZnO. The contribution of photocatalysis and adsorption was estimated to be 72.74% and 14.44%, respectively, indicating the dominance of photocatalysis process. According to kinetic study, the optimum photocatalyst showed the highest apparent rate constant and lowest half‐life time of ammonia removal. The maximum quantum yield of 1.7% was calculated from the best photocatalyst composite at the maximum intensity of visible light received from sunlight. The reuse ability test revealed that the optimum ternary photocatalyst is suitable for wastewater treatments in practical applications.

show abstract

Construction of g-C 3 N 4 /CeO 2 /ZnO ternary photocatalysts with enhanced photocatalytic performance

Cited by 140 publications

References 71 publications

Developing the Ternary ZnO Doped MoS2 Nanostructures Grafted on CNT and Reduced Graphene Oxide (RGO) for Photocatalytic Degradation of Aniline

Developing the Ternary ZnO Doped MoS2 Nanostructures Grafted on CNT and Reduced Graphene Oxide (RGO) for Photocatalytic Degradation of Aniline

Insights Into Interfacial Interaction and Its Influence on the Electronic and Optical Properties of Two‐Dimensional WS₂/TX₂CO₂ (TX = Ti, Zr) van der Waals Heterostructures

Application of mixture experimental design for photocatalytic ammonia degradation by sunlight‐driven WO ₃ ‐Ag ₃ PO ₄ ‐ZnO ternary photocatalysts

Contact Info

Product

Resources

About

Construction of g-C 3 N 4 /CeO 2 /ZnO ternary photocatalysts with enhanced photocatalytic performance

Cited by 140 publications

References 71 publications

Developing the Ternary ZnO Doped MoS2 Nanostructures Grafted on CNT and Reduced Graphene Oxide (RGO) for Photocatalytic Degradation of Aniline

Developing the Ternary ZnO Doped MoS2 Nanostructures Grafted on CNT and Reduced Graphene Oxide (RGO) for Photocatalytic Degradation of Aniline

Insights Into Interfacial Interaction and Its Influence on the Electronic and Optical Properties of Two‐Dimensional WS2/TX2CO2 (TX = Ti, Zr) van der Waals Heterostructures

Application of mixture experimental design for photocatalytic ammonia degradation by sunlight‐driven WO 3 ‐Ag 3 PO 4 ‐ZnO ternary photocatalysts

Contact Info

Product

Resources

About

Insights Into Interfacial Interaction and Its Influence on the Electronic and Optical Properties of Two‐Dimensional WS₂/TX₂CO₂ (TX = Ti, Zr) van der Waals Heterostructures

Application of mixture experimental design for photocatalytic ammonia degradation by sunlight‐driven WO ₃ ‐Ag ₃ PO ₄ ‐ZnO ternary photocatalysts