A Simple Demonstration of Photocatalysis Using Sunlight

Pitcher, Michael W.; Emin, Saim; Valant, Matjaž

doi:10.1021/ed300048z

Cited by 16 publications

(24 citation statements)

References 15 publications

(18 reference statements)

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“…They are characterized by strong structural and color stability imparted by their high degree of aromaticity and extensively conjugated chromophores [1] and conventional waste water treatment technologies are ineffective for removing dyes. Photocatalytic technology is of great potential for complete degradation of organic dye molecules to mineralize ultimate products such as CO 2 and H 2 O [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of Ag3PO4/BiOI heterostructure photocatalyst with highly visible-light-induced photocatalytic properties

Wang

Cheng

Meng

et al. 2015

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of Ag3PO4/BiOI heterostructure photocatalyst with highly visible-light-induced photocatalytic properties

Wang

Cheng

Meng

et al. 2015

Journal of Alloys and Compounds

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“…5. Carbon dioxide and water were the final oxidation products of glycerol via intermediates including glyceraldehyde, glycolaldehyde, glycolic acid, and formaldehyde [8,12].…”

Section: Effects Of Polyol and Irradiation Time On Dye Decolorizationmentioning

confidence: 99%

“…However, the efficiency of the photo-induced decolorization of dyes was in general low due to the recombination of the electrons and holes. In order to inhibit this disadvantage, an electron donor could be added into the reaction mixture as a hole scavenger to achieve high efficiency of decolorization process of colored organic dyes [12]. Polyols were well-known as electron donors.…”

Section: Introductionmentioning

confidence: 99%

Decolorization of textile dyes by TiO2 -based photocatalyst using polyol as electron donor

Pham

Hoang

Nguyen

et al. 2019

Sci. Tech. Dev. J. - Nat. Sci.

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Decolorization of textile dyes including 2,6-dichlorophenolindophenol (DCIP), congo red (CR) and methyl orange (MO) by using TiO2-based photocatalyst in the presence of polyols such as glycerol and ethylene glycol was investigated. Polyols were used as sacrificial electron donors (SEDs). The results showed that the polyols improved the rate and yield of a light-induced decolorization of dyes in comparison with a photocatalytic reaction without polyols. A possible reaction mechanism of dye decolorization by the photocatalyst in the presence of electron donors was proposed. TiO2 photocatalyst absorbed light to generate electrons (e-) and holes (h+). The electrons and holes were prevented from recombining by the presence of SEDs. The free electrons and holes then involved in decolorization processes through reduction or oxidation reactions. The effects of TiO2 catalyst amounts, irradiation time and polyol concentrations on dye decolorization were investigated. The decolorization efficiency significantly increased with the increasing irradiation time, SED concentrations and certain amounts of TiO2.

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“…15 Pitcher et al described a simple demonstration of photocatalysis using the photodegradation of 2,6-dicholorophenolindophenol sodium salt (DCIP) over the commercially available TiO 2 . 16 Stefanov et al developed a relatively cheap and readily available 3D-printed gas-phase photocatalytic equipment for online monitoring of air-pollutant photodegradation, demonstrating the advanced scientific topics for chemical-engineering students. 19 More 22 In that experiment, the volume of hydrogen evolved was determined from the displacement of liquid into the graduated pipet.…”

Section: ■ Introductionmentioning

confidence: 99%

Photocatalytic Hydrogen Production over CdS Nanomaterials: An Interdisciplinary Experiment for Introducing Undergraduate Students to Photocatalysis and Analytical Chemistry

Deng

Jiang

et al. 2019

J. Chem. Educ.

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Photocatalytic hydrogen generation over semiconductor photocatalysts has attracted considerable attention over the past few decades. This experiment is designed for sophomore- and higher-level undergraduates who are in the majors of materials chemistry, analytical chemistry, catalysis, or chemical engineering. In this experiment, CdS nanoparticles and nanosheets were first fabricated with a one-step direct-precipitation reaction and a two-step precipitation–ion-exchange reaction, respectively, and then used as photocatalysts for visible-light hydrogen evolution from water, in the presence of noble-metal Pt nanoparticles as in situ cocatalysts and sodium sulfide and sulfite (Na2S/Na2SO3) as sacrificial reagents. A gas chromatograph with a thermal-conductivity detector (GC-TCD) was used to quantitatively monitor the produced hydrogen gas. This interdisciplinary experiment is expected to give students an introduction to nanomaterial synthesis, the general process of photocatalytic hydrogen generation, and the principles and use of instruments. Upon the completion of the experiment, students understand how chemistry can be utilized for renewable-energy applications.

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A Simple Demonstration of Photocatalysis Using Sunlight

Cited by 16 publications

References 15 publications

Preparation and characterization of Ag3PO4/BiOI heterostructure photocatalyst with highly visible-light-induced photocatalytic properties

Preparation and characterization of Ag3PO4/BiOI heterostructure photocatalyst with highly visible-light-induced photocatalytic properties

Decolorization of textile dyes by TiO2 -based photocatalyst using polyol as electron donor

Photocatalytic Hydrogen Production over CdS Nanomaterials: An Interdisciplinary Experiment for Introducing Undergraduate Students to Photocatalysis and Analytical Chemistry

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