Treatment of Dye Wastewater Using Hydrothermally Prepared Nano-TiO2 Under Natural Light

Yan, Fa Chun; Wang, Xun

doi:10.1007/s10904-015-0290-6

Cited by 6 publications

(2 citation statements)

References 13 publications

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“…It is often detected in surface water, soil and vegetables, posing a severe threat to human health (Schmitt et al 2006;Akiyama & Savin 2010). At present, the primary methods for removing dyes and antibiotics from aqueous solutions include adsorption (Liu et al 2010;Peng et al 2012;Markandeya et al 2021), advanced oxidation (Santos et al 2015;Yan et al 2016), biodegradation and membrane separation (Amorim et al 2014;Hussein & Scholz 2018). Among these technologies, adsorption is considered an effective and inexpensive method to remove pollutants from wastewater without producing more toxic or difficult À to À degrade pollutants than has been concerned.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Congo red and tetracycline onto water treatment sludge biochar: characterisation, kinetic, equilibrium and thermodynamic study

Chen

et al. 2022

Water Science and Technology

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In this study, readily available inexpensive water treatment sludge (WTS) was used to prepare adsorbent for the removal of Congo red (CR) and tetracycline (TC) from aqueous solutions. The structural characteristics and adsorption properties of WTS biochar were characterised via scanning electron microscope, energy dispersive X − ray spectroscopy, Brunauer − Emmett − Teller and Fourier Transform infrared spectroscopy. In batch experiments, the adsorption factors, kinetics, isothermal curves and thermodynamics of the adsorption properties were investigated. The optimum preparation condition of WTS biochar was 400 °C for 4 h under O2 − limited pyrolysis, which exhibited increased specific surface area and pore structures. The best adsorption was observed when the pH of the CR and TC solutions was 7 and 4, respectively. The adsorption process followed the pseudo − second − order model, indicating that the main control step was the chemical adsorption process. Isotherm data were best described by the Langmuir model, and the maximum adsorption capacities for CR and TC were 116.4 and 58.5 mg·g−1, respectively. Thermodynamic parameters revealed that the adsorption process was spontaneous and endothermic. According to the analysis, the adsorption mechanism of CR could be attributed to electrostatic attraction, π–π conjugation and hydrogen bonding, whereas that of TC was potentially associated with cation exchange, complex precipitation, π–π conjugation and hydrogen bonding.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Congo red and tetracycline onto water treatment sludge biochar: characterisation, kinetic, equilibrium and thermodynamic study

Chen

et al. 2022

Water Science and Technology

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“…In the past decades, heterogeneous photocatalytic process has been attracted worldwide attention as a promising technology due to its applicability in the several areas of environmental treatments [1,2]. Among photocatalyst materials, titanium dioxide (TiO 2 ) has been widely interested by many researchers because of its chemical stability, low cost, non-toxicity and high performance in photocatalytic process [3]. However, the practical applications of TiO 2 photocatalyst have some drawbacks, such as, higher recombination rate of electron (e -) -hole (h + ) pairs in the photocatalysis and low absorption ability for visible-light or sunlight energy because of its wide ban gap [1,4].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Photocatalytic Activities of TiO<sub>2</sub>-rGO Nanocomposite Catalysts for MB Dye Degradation over Sunlight Irradiation

Sriwong

Choojun

Tejangkura

et al. 2018

MSF

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This research aims to investigate photocatalytic activities of titanium dioxide (TiO2) incorporated with reduced graphene oxide (rGO) nanocomposite catalysts. These TiO2-rGO photocatalysts were easily prepared through a direct-mixing of TiO2powder suspended in acidic solution under the different amounts of rGO loading (0.25, 0.50, 0.75 and 1.00 wt%). Then, the obtained TiO2-rGO samples were characterized by a several techniques. The results demonstrated that the crystalline phases of all samples are corresponding to pristine TiO2, whereas the characteristic peaks of rGO in the TiO2-rGO nanocomposites could be observed and also well-confirmed by Raman spectroscopy. TEM results showed that the TiO2nanoparticles were well-combined with rGO nanosheets. Moreover, the photocatalytic activities of all TiO2-rGO photocatalyst samples were evaluated by photodegrading of methylene blue (MB) dye solution under natural sunlight irradiation. The results revealed that all TiO2-rGO nanocatalysts exhibited much higher activity than those of the bare TiO2. The improved photocatalytic activity can be attributed to the presence of rGO nanosheets, leading to the decrease of electron (e-) - hole (h+) recombination of TiO2catalyst, increasing charge transfer rate of electrons and surface-adsorbed amount of MB molecules which enhances the photocatalytic activity.

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The utilization of dye wastewater in enhancing catalytic activity of CeO2-TiO2 mixed oxide catalyst for NO reduction and dichloromethane oxidation

Zeng

Wang

et al. 2019

Chemosphere

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Treatment of Dye Wastewater Using Hydrothermally Prepared Nano-TiO2 Under Natural Light

Cited by 6 publications

References 13 publications

Adsorption of Congo red and tetracycline onto water treatment sludge biochar: characterisation, kinetic, equilibrium and thermodynamic study

Adsorption of Congo red and tetracycline onto water treatment sludge biochar: characterisation, kinetic, equilibrium and thermodynamic study

Preparation and Photocatalytic Activities of TiO<sub>2</sub>-rGO Nanocomposite Catalysts for MB Dye Degradation over Sunlight Irradiation

The utilization of dye wastewater in enhancing catalytic activity of CeO2-TiO2 mixed oxide catalyst for NO reduction and dichloromethane oxidation

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