Kinetics of Photocatalytic Degradation of Gaseous Organic Compounds on Modified TiO2/AC Composite Photocatalyst

Yang, Qingshan; Yong-jin, Liao; Mao, Lingling

doi:10.1016/s1004-9541(11)60221-8

Cited by 46 publications

(12 citation statements)

References 15 publications

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“…This got into the design of highly effective TiO 2 : AC hybrid heterojunction photocatalyst; also the demand of commonsensible crosscheck capacity of band potentials among hybrid modules, the spatially and flat accessible transmission of holes and electron at the exposed surface, and the hole and electron movement of the hybrid system are important to enhance the photocatalytic action. It has been reported that the surface chemistry and map of AC revealed major effect on the collection of TiO 2 particles and photocatalytic deprivation of 4-chlorophenol [256,257]. Adding to this, some researchers have constructed TiO 2 with AC microspheres to both maintain spreading and speeding up separation due to the AC microsphere that can be balanced with airy bubbles and it can be speedily settled in the reactor base with the help of some gravity due to the air bubbles [241].…”

Section: Tio 2 : Ac Photocatalyst Systemmentioning

confidence: 99%

“…This synergistic effect of the interaction of AC and TiO 2 has been previously been stated for deprivation of some organic compounds in the photocatalytic process. It has been credited to a common contact between the different solid phases, in which AC acts as an efficient adsorption agent for the organic pollutants [257] (Figure 12).…”

Section: Tio 2 : Ac Photocatalyst Systemmentioning

confidence: 99%

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Functionalized Activated Carbon Derived from Biomass for Photocatalysis Applications Perspective

Bagheri

Julkapli

Hamid

2015

International Journal of Photoenergy

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This review highlighted the developments of safe, effective, economic, and environmental friendly catalytic technologies to transform lignocellulosic biomass into the activated carbon (AC). In the photocatalysis applications, this AC can further be used as a support material. The limits of AC productions raised by energy assumption and product selectivity have been uplifted to develop sustainable carbon of the synthesis process, where catalytic conversion is accounted. The catalytic treatment corresponding to mild condition provided a bulk, mesoporous, and nanostructure AC materials. These characteristics of AC materials are necessary for the low energy and efficient photocatalytic system. Due to the excellent oxidizing characteristics, cheapness, and long-term stability, semiconductor materials have been used immensely in photocatalytic reactors. However, in practical, such conductors lead to problems with the separation steps and loss of photocatalytic activity. Therefore, proper attention has been given to develop supported semiconductor catalysts and certain matrixes of carbon materials such as carbon nanotubes, carbon microspheres, carbon nanofibers, carbon black, and activated carbons have been recently considered and reported. AC has been reported as a potential support in photocatalytic systems because it improves the transfer rate of the interface charge and lowers the recombination rate of holes and electrons.

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Section: Tio 2 : Ac Photocatalyst Systemmentioning

confidence: 99%

Section: Tio 2 : Ac Photocatalyst Systemmentioning

confidence: 99%

Functionalized Activated Carbon Derived from Biomass for Photocatalysis Applications Perspective

Bagheri

Julkapli

Hamid

2015

International Journal of Photoenergy

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“…Based on the time series of gaseous HCHO concentration, the removal of HCHO appears to follow a zero order reaction (Yang et al, 2012). The reaction rate is approximately constant over the monitoring period.…”

Section: Kinetics Of Heterogeneous Reactionsmentioning

confidence: 99%

Using Box Modeling to Determine Photodegradation Coefficients Describing the Removal of Gaseous Formaldehyde from Indoor Air

Lin

Jwo

et al. 2017

Aerosol Air Qual. Res.

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Human exposure to volatile organic compounds (VOCs) indoors is receiving increasing attention. Formaldehyde (HCHO) is the most common VOC emitted from household materials and is associated with many health risks, including sick building syndrome. In this study, a simple box model was developed and applied to help understand the fate and degradation mechanisms of HCHO in the indoor environment. The model was validated using observations from an air handling system under different conditions. A UV/TiO 2 filter reactor was installed in a closed box with the air conditioning unit. Three parameters, temperature, relative humidity, and circulation wind speed, were investigated for their effects on the performance of the air handling system. Our results show that the operation mode of the air handling system has a greater effect on the removal of HCHO than any of the air conditioning parameters. From a kinetic perspective, the removal of gaseous HCHO from a constant-volume box clearly represents a zero-order reaction. After UV irradiation with a TiO 2 filter for 2 hours, the removal efficiency of gaseous HCHO increases to approximately 90%. Contributions to the removal of gaseous HCHO from natural dissipation, photodegradation, and photocatalytic oxidation decomposition are 12%, 30%, and 58%, respectively. Our results have implications for reducing indoor air pollution and reducing stress on air conditioning systems. Meeting these goals is beneficial for human health and energy conservation in modern society.

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“…Recognizing the potential water pollution issues, worldwide researchers have dedicated their prime efforts to prevent these overwhelming matters by developing highly advanced environmental technologies for a sustainable future 6 , 7 . The imperative task of removing these pollutants from industrial effluents before their discharge into environment is a remarkable challenge globewise 8 – 10 . Apart from this, the chemical analysis of target pollutants and degradation products in the industrial effluents and treated wastewater is also important to check the treatment efficiency and environment safety.…”

Section: Introductionmentioning

confidence: 99%

Solvothermal synthesis of facet-dependent BiVO4 photocatalyst with enhanced visible-light-driven photocatalytic degradation of organic pollutant: assessment of toxicity by zebrafish embryo

Kamble

Ling

2020

Sci Rep

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the BiVo 4 photocatalyst plays a very important role in photocatalytic reactions attributed to its unique crystalline structure, size, morphology and surface area. Herein, we report a facet-dependent monoclinic scheelite BiVo 4 (m-BiVo 4) photocatalyst with uniform truncated square (18 sided) hexagonal bipyramidal shape synthesized by a template-free and surfactant-free solvothermal method using ethylene glycol solvent under cost-effective and mild reactions. The structural, morphological and optical properties of the m-BiVo 4 photocatalyst are widely characterized. the photocatalytic activity of the m-BiVo 4 photocatalyst is tested towards 20 ppm methylene blue (MB) dye aqueous solution as a pollutant model under visible light irradiation. enhanced visible-light driven photoactivity with dye degradation efficiency of approx. 91% at a rate of 0.388 × 10 −2 min −1 is obtained, presumably due to the presence of high-active (040) facets. Zebrafish embryo toxicity test of treated MB dye solution reveals the degradation and toxicity reduction of the MB dye. Moreover, the recycling experiment validates that the m-BiVo 4 photocatalyst has a great structural stability with reliable performance. this work may provide a lucid and expedient strategy to synthesize highly crystalline (040) facet-dependent semiconductor photocatalyst toward dye degradation and obviously industrial wastewater remediation. Earth is gifted with abundant quantity of clean water. But now days, the world is found in serious risk on environmental and economic stability due to the enormous population and industrialization growth 1. Today in many industries, organic dyes are used extensively and mainly in textile, leather, cosmetics, plastic, paper, ink, ceramic and food processings. Along with these, huge amounts of industrial effluents containing various organic pollutants such as agrochemicals, drugs and antibiotics have also been discharged into fresh water 2,3. Particularly in textile industries, dyes are commonly used owing to their favourable characteristics such as water-soluble, low-price, bright colours and easier to apply on the fabric. The dyes are usually categorized based on their chromophoric structures and different types of dyes such as azo, diazo, xanthene, anthraquinone, acidic and basic dyes are readily available. The azo dyes (-N=N-) are most commonly employed in textile industries and exhibit environmental toxicity effects including carcinogenic and mutagenic events to human beings, animals and water bodies 4. Prior to 2018, it was projected that approximately 70% of the industrially wastewater was not

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Kinetics of Photocatalytic Degradation of Gaseous Organic Compounds on Modified TiO2/AC Composite Photocatalyst

Cited by 46 publications

References 15 publications

Functionalized Activated Carbon Derived from Biomass for Photocatalysis Applications Perspective

Functionalized Activated Carbon Derived from Biomass for Photocatalysis Applications Perspective

Using Box Modeling to Determine Photodegradation Coefficients Describing the Removal of Gaseous Formaldehyde from Indoor Air

Solvothermal synthesis of facet-dependent BiVO4 photocatalyst with enhanced visible-light-driven photocatalytic degradation of organic pollutant: assessment of toxicity by zebrafish embryo

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