Microwave assisted hydrothermal synthesis of Ag/AgCl/WO3 photocatalyst and its photocatalytic activity under simulated solar light

Adhikari, Rajesh; Gyawali, Gobinda; Sekino, Tohru; Lee, Soo Wohn

doi:10.1016/j.jssc.2012.08.012

Cited by 76 publications

(41 citation statements)

References 30 publications

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“…5A). In order to compare the efficiency of Ag 0 supported on the TiO 2 prepared by the current in situ electrochemical method (IS), the 5 wt% Ag-TiO 2 were also prepared by the conventional photodeposition (PD) method, in which the Ag ions were reduced to Ag 0 under UV irradiation for 3 h subsequent to the addition of TiO 2 [23]. While, Fig.…”

Section: Performance Of the Catalystsmentioning

confidence: 99%

“…Indeed, various methods have used to synthesize Ag 0 nanoparticles on TiO 2 supports by reducing Ag + to the metallic form, including heat-induced reduction, reducing agents, photoreduction, ionic liquids and UV or gamma ray methods [21][22][23]. However, these methods require either high temperature or a long reaction time to obtain the metallic Ag.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Direct in situ activation of Ag0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity

Jaafar

Jalil

Triwahyono

et al. 2015

Applied Surface Science

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Section: Performance Of the Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Direct in situ activation of Ag0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity

Jaafar

Jalil

Triwahyono

et al. 2015

Applied Surface Science

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“…Many efforts have been made for extending the absorption range of ZnO, such as elements doping and metal-semiconductor heterostructure formation. Silver halides are widely recognized as photosensitive materials [25][26][27][28][29][30][31][32][33][34][35] . Recently, research showed that the Ag-AgCl supported metal oxide semiconductor has enhanced photocatalytic activity under visible or simulated solar light 36,37 .…”

Section: Introductionmentioning

confidence: 99%

Removal of Methyl Tertiary-Butyl Ether via ZnO-AgCl Nanocomposite Photocatalyst

Liu

et al. 2016

Mat. Res.

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IntroductionMethyl tertiary-butyl ether (MTBE) has received a very high attention over the last decade due to its widespread detection in indoor environments 1,2 . MTBE is used as an additive of oxygen added to gasoline in order to elevate the octane number, combustion improvement, and reduce CO 2 production. However, MTBE has been recognized as a prevalent and persistent groundwater and surface water pollutant. Acute toxicity levels of MTBE for rodent LD 50 and lethal air concentrations for rats (LC 50 ) were estimated to be 3.8-3.9 g/kg and 65-126 g/m 3 , respectively 3,4 . However, the presence of MTBE in water is mainly responsible for taste and odor related problems. Moreover, the International Agency of Research on Cancer (IARC) and the U.S. Environmental Protection Agency (EPA) classified MTBE as a health risk threat in 2000 5 . Therefore, removal of MTBE from water is an important issue.So far, many methods have been studied for removing MTBE. Such as adsorption 6 , air stripping , biodegradation 13 and electrochemical oxidation 14 . Among them, designing suitable photocatalyst for MTBE degradation received a considerable attention due to its green approach, free sun energy and easy to scale-up. ZnO is a well-known n-type semiconductor with band gap energy of 3.37 eV, hence is considered as one of the best photocatalysts to deal with organic pollutant [15][16][17][18][19][20][21] . However, the photocatalytic activity of ZnO is still restricted by fast recombination of the photogenerated electron-hole pairs [22][23][24] . Many efforts have been made for extending the absorption range of ZnO, such as elements doping and metal-semiconductor heterostructure formation. Silver halides are widely recognized as photosensitive materials [25][26][27][28][29][30][31][32][33][34][35] . Recently, research showed that the Ag-AgCl supported metal oxide semiconductor has enhanced photocatalytic activity under visible or simulated solar light 36,37 . Therefore, combining ZnO with silver halide is expected as an ideal photocatalyst for MTBE removal. Herein, we proposed a simple one-pot hydrothermal method for ZnO-AgCl nanocomposite formation. The photocatalytic activity of prepared ZnO-AgCl nanocomposite was tested. To the best of our knowledge, this is the first report of using ZnOAgCl nanocomposite for MTBE photodegradation. Experimental MaterialsZinc nitrate hexahydrate (Zn(NO 3 ) 2 •6H 2 O), ammonium hydroxide (28-30% NH 3 basis), silver nitrate (AgNO 3 ) and methyl tert-butyl ether (99%) were purchased from Sigma-Aldrich. All other chemicals used were analytical grade reagents without further purification. Milli-Q water (18.2 MΩ cm) was used throughout the experiments. Preparation of ZnO-AgCl nanocompositeCertain amount of zinc nitrate hexahydrate was dissolved in 50 mL of water. Then, 5 mL of ammonium hydroxide was added into the solution for 15 min stirring. Afterward, a certain amount of AgNO 3 solution (50 mM) was slowly added. After 30 min stirring, 5 mL of NaCl (0.5 M) was slowly added into the formed suspens...

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“…It has been recently used as a visible light active photocatalyst for the conversion of light energy into chemical energy. Intensive efforts have been devoted to develop ecofriendly materials that are active under visible light irradiation [1].…”

Section: Introductionmentioning

confidence: 99%

“…In 2013 Adhikari et al used microwave assisted hydrothermal method for the formation of photocatalyst. The composite photocatalyst exhibited much higher photocatalytic activities compared to other synthesis methods [1]. At present, much effort has been devoted to prepare ecofriendly materials to apply in environmental pollution remediation process and to understand its phasial state, morphology and surface area [7].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nano Materials by Microwave Assisted Hydrothermal Method

et al. 2015

Self Cite

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Bismuth tungstate nano materials have been successfully synthesized by microwave assisted hydrothermal method. Bismuth nitrate (Bi(NO 3 ) 3 .5H 2 O) and sodium tungstate (Na 2 WO 4 .2H 2 O) are used as a starting material for the preparation of nano materials and solution pH was maintained to 3. The prepared material was characterized by X-ray diffraction (XRD) to study the phase state, whereas surface morphology was observed by Scanning Electron Microscopy (SEM). The surface area was determined by Brunauer-Emmett-Teller (BET) method. The results revealed that materials are crystalline in nature having crystallite size of ~ 24 nm with surface area of 6.5 m 2 /g. SEM image of prepared materials showed a unique discrete hierarchical morphology. The prepared material showed visible light active photocatalytic nature for the decomposition of Rhodamine B.

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Microwave assisted hydrothermal synthesis of Ag/AgCl/WO3 photocatalyst and its photocatalytic activity under simulated solar light

Cited by 76 publications

References 30 publications

Direct in situ activation of Ag0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity

Direct in situ activation of Ag0 nanoparticles in synthesis of Ag/TiO2 and its photoactivity

Removal of Methyl Tertiary-Butyl Ether via ZnO-AgCl Nanocomposite Photocatalyst

Synthesis of Nano Materials by Microwave Assisted Hydrothermal Method

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