Utilization of tannery wastewater as a source of Cr doped into TiO2 for improving its activity under visible light in the Congo red degradation

Wahyuni, Endang Tri; Wahyuni, Sri; Lestari, Novianti Dwi; Suherman, Suherman

doi:10.1007/s11144-023-02367-2

Cited by 3 publications

(4 citation statements)

References 31 publications

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“…A critical health issue in modern times is the lack of clean drinking water because the final goal of the above-mentioned industrial waste effluent is the aquatic environment. Thus, drinking water resources may be polluted and contained by various hazardous chemicals, including pharmaceuticals, − organic synthetic dyes, − insecticides, detergents, herbicides, and pesticides. ,− For example, introducing antibiotics, as a class of pharmaceutical pollutants, into aquatic resources has some adverse effects on human health and marine life due to their potentially toxic and hazardous products and persistence . Their long-term presence in the environment can cause the occurrence of resistant genes .…”

Section: Photodegradation Of Organic Pollutantsmentioning

confidence: 99%

A Comprehensive Review on the Boosted Effects of Anion Vacancy in the Heterogeneous Photocatalytic Degradation, Part II: Focus on Oxygen Vacancy

Rezaei,

Nezamzadeh-Ejhieh,

Massah

2024

ACS Omega

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Environmental problems, including the increasingly polluted water and the energy crisis, have led to a need to propose novel strategies/methodologies to contribute to sustainable progress and enhance human well-being. For these goals, heterogeneous semiconducting-based photocatalysis is introduced as a green, eco-friendly, cost-effective, and effective strategy. The introduction of anion vacancies in semiconductors has been wellknown as an effective strategy for considerably enhancing the photocatalytic activity of such photocatalytic systems, giving them the advantages of promoting light harvesting, facilitating photogenerated electron−hole pair separation, optimizing the electronic structure, and enhancing the yield of reactive radicals. This Review will introduce the effects of anion vacancy-dominated photodegradation systems. Then, their mechanism will illustrate how an anion vacancy changes the photodegradation pathway to enhance the degradation efficiency toward pollutants and the overall photocatalytic performance. Specifically, the vacancy defect types and the methods of tailoring vacancies will be briefly illustrated, and this part of the Review will focus on the oxygen vacancy (OV) and its recent advances. The challenges and development issues for engineered vacancy defects in photocatalysts will also be discussed for practical applications and to provide a promising research direction. Finally, some prospects for this emerging field will be proposed and suggested. All permission numbers for adopted figures from the literature are summarized in a separate file for the Editor.

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Section: Photodegradation Of Organic Pollutantsmentioning

confidence: 99%

A Comprehensive Review on the Boosted Effects of Anion Vacancy in the Heterogeneous Photocatalytic Degradation, Part II: Focus on Oxygen Vacancy

Rezaei,

Nezamzadeh-Ejhieh,

Massah

2024

ACS Omega

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“…The semiconducting-based photocatalytic degradation has been well-known effective removal technique for various organic pollutants based on inducing the photoexcited electrons in the conduction band (CB) and the leaved holes in the valence band (VB) under the UV or visible lights’ illumination of the semiconductor used [ [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] ]. The e − /h + pairs induced can directly reduce or oxidize molecules of pollutants and begin their degradation reaction.…”

Section: Introductionmentioning

confidence: 99%

The coupled WO3-AgBr nanocatalyst, part II: Synthesis, characterization, and the boosted photocatalytic activity towards metronidazole in an aqueous solution

Shabanian-Broujeni,

Nezamzadeh-Ejhieh

2024

Heliyon

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“…Although, these methods are no longer very effective and not feasible cost-wise, too. 4 Moreover, the urgent need is to design a new technology that can be eco-friendly and cost-effective for treating industrial hazardous water waste. Under these circumstances, more awareness is required for the heterogeneous photocatalysts due to their enormous variety of uses in the case of photocatalytic hydrogen generation, photoreaction activities, solar cells, efficient transport behaviour of the electron and separation of various kinds of organic pollutants that are present in water or air.…”

Section: Introductionmentioning

confidence: 99%

“…The conventional approach to removing hazardous pollutants involves biochemical and physical methods, similar to liquid membranes and adsorption. Although, these methods are no longer very effective and not feasible cost‐wise, too 4 . Moreover, the urgent need is to design a new technology that can be eco‐friendly and cost‐effective for treating industrial hazardous water waste.…”

Section: Introductionmentioning

confidence: 99%

Physical properties and photocatalytic activity of Cr‐doped TiO₂ nanoparticles

Abushad

Naseem

Arshad

et al. 2023

Journal of Microscopy

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Nanocrystalline Ti1‐xCrxO2 (0 ≤ x ≤ 0.20) samples were synthesised via acid‐modified sol‐gel process and characterised with various techniques, such as HRTEM, FESEM, Raman, XPS, DTA and VSM. The TEM image of TiO2 exhibits elongated nanoparticles with an average size of 10 nm. The HRTEM in combination with selected area electron diffraction (SAED) reveals the interplanar spacing and polycrystalline nature of the samples, respectively. FESEM micrographs divulge nonuniform morphologies and less aggregation of the particles in the doped sample. Raman spectra ensure the phase purity of the samples and a blue shift on Cr doping. X‐ray photoelectron spectra (XPS) predict the chemical state of the elements and oxygen vacancies in the prepared samples. Room temperature magnetic measurements exhibit a significant variation in the magnetic parameters on Cr doping in TiO2. The differential thermal analysis (DTA) shows the structural phase transition at ∼630°C. The photocatalytic performance is studied for the degradation of methylene blue (MB) dye under visible light irradiation. A higher photocatalytic efficiency is found for the 20% of Cr‐doped TiO2. These studies propose that the appropriate incorporation of Cr ions makes TiO2 very efficient for visible light‐driven photocatalysts required for applications in wastewater treatment.LAY DESCRIPTION: In the present study, nanoparticles of TiO2 and Cr‐doped TiO2 have been synthesised by a cost‐effective acid‐modified sol‐gel process. The effect of Cr doping on the microstructure, thermal, magnetic and photocatalytic properties of TiO2 were explored in detail. The transmission electron microscopy (TEM) images exhibit the presence of elongated nanoparticles with an average size of 10 nm. Field emission scanning electron microscopy (FESEM) was used to study the surface morphology of the synthesised materials, which revealed nonuniform morphologies and less aggregation of the particles in the Cr‐doped sample. Energy dispersive x‐ray spectroscopy (EDS) confirms the elemental compositions with the appropriate stoichiometry of the elements. Raman spectra ensure the phase purity of the materials and also a blue shift with the incorporation of Cr ions in TiO2. X‐ray photoelectron spectra (XPS) predict the chemical state of the elements and oxygen vacancies in the prepared samples. The magnetic nature of all the synthesised samples was examined through the vibrating sample magnetometer (VSM) and revealed weak ferromagnetic behaviour of the samples. These results signify that the oxygen vacancies and defects play a crucial role in developing the ferromagnetic nature of oxide semiconductors. The differential thermal analysis (DTA) shows the structural phase transition at ∼630°C. The photocatalytic performance of the prepared samples was studied for the degradation of methylene blue (MB) dye under irradiation of visible light. A higher photocatalytic efficiency was found for the 20% of Cr‐doped TiO2. These studies propose that the appropriate incorporation of Cr ions makes TiO2 very efficient for visible light‐driven photocatalysts required for applications in wastewater treatment.

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Utilization of tannery wastewater as a source of Cr doped into TiO2 for improving its activity under visible light in the Congo red degradation

Cited by 3 publications

References 31 publications

A Comprehensive Review on the Boosted Effects of Anion Vacancy in the Heterogeneous Photocatalytic Degradation, Part II: Focus on Oxygen Vacancy

A Comprehensive Review on the Boosted Effects of Anion Vacancy in the Heterogeneous Photocatalytic Degradation, Part II: Focus on Oxygen Vacancy

The coupled WO3-AgBr nanocatalyst, part II: Synthesis, characterization, and the boosted photocatalytic activity towards metronidazole in an aqueous solution

Physical properties and photocatalytic activity of Cr‐doped TiO₂ nanoparticles

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Utilization of tannery wastewater as a source of Cr doped into TiO2 for improving its activity under visible light in the Congo red degradation

Cited by 3 publications

References 31 publications

A Comprehensive Review on the Boosted Effects of Anion Vacancy in the Heterogeneous Photocatalytic Degradation, Part II: Focus on Oxygen Vacancy

A Comprehensive Review on the Boosted Effects of Anion Vacancy in the Heterogeneous Photocatalytic Degradation, Part II: Focus on Oxygen Vacancy

The coupled WO3-AgBr nanocatalyst, part II: Synthesis, characterization, and the boosted photocatalytic activity towards metronidazole in an aqueous solution

Physical properties and photocatalytic activity of Cr‐doped TiO2 nanoparticles

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Product

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Physical properties and photocatalytic activity of Cr‐doped TiO₂ nanoparticles