Immobilized TiO2/chitosan beads for photocatalytic degradation of 2,4-dichlorophenoxyacetic acid

Balakrishnan, Akash; Sowmya, Appunni; Gopalram, Keerthiga

doi:10.1016/j.ijbiomac.2020.05.204

Cited by 76 publications

(21 citation statements)

References 34 publications

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“…The adsorption bands at 616 and 587 cm –1 are due to the bending vibrations of Ti–O–Ti . The adsorption peak at 985 cm –1 is assigned to the stretching vibration of Ti–O–C between TiO 2 nanoparticles and PDA, indicating the presence of cross-linking between the hydroxyl groups of TiO 2 nanoparticles and the catechol groups of PDA and thus the formation of TiO 2 -based micro-/nanostructures. The peaks at 1202 and 1237 cm –1 are ascribed to the stretching vibration of C–F in terms of either −CF 2 or −CF 3 , showing the grafting of FDTS to the TiO 2 /PDA-based paper.…”

Section: Resultsmentioning

confidence: 99%

Mussel-Inspired Durable TiO₂/PDA-Based Superhydrophobic Paper with Excellent Self-Cleaning, High Chemical Stability, and Efficient Oil/Water Separation Properties

Shi

Gao

et al. 2022

Langmuir

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Oceanic oil spill and the discharge of industrial oily wastewaters can cause significant threats to the ecological environment and human health. Herein, we design a durable TiO 2 /PDA-based superhydrophobic paper for efficient oil/water separation. Bioinspired from mussel adhesive proteins, the mechanical durability of the asprepared superhydrophobic paper is enhanced by the deposition of polydopamine (PDA) onto cellulosic fibers via self-polymerization of dopamine. The TiO 2 /PDA-based superhydrophobic paper shows a high water contact angle of 168.2°and an oil contact angle of ∼0°, exhibiting excellent superhydrophobicity and superoleophilicity. Furthermore, the asprepared superhydrophobic paper possesses excellent chemical stability, thermal stability, and mechanical durability in terms of being immersed in corrosive solutions and solvents and boiling water and being subjected to the sandpaper abrasion test, respectively. More importantly, the separation efficiency of the TiO 2 /PDA-based superhydrophobic paper for an oil/water mixture is 97.2%, and it maintains a separation efficiency above 94.3% even after 15 cyclic separation processes. Furthermore, the separation efficiency for water-in-oil emulsions is higher than 93.7% after 15 cyclic separation tests, showing its excellent recyclable stability for water-in-oil emulsions. Therefore, the rationally designed TiO 2 /PDA-based superhydrophobic paper shows great potential in the practical applications of self-cleaning, antifouling, and oil/water separation.

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Section: Resultsmentioning

confidence: 99%

Mussel-Inspired Durable TiO₂/PDA-Based Superhydrophobic Paper with Excellent Self-Cleaning, High Chemical Stability, and Efficient Oil/Water Separation Properties

Shi

Gao

et al. 2022

Langmuir

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“…Conducting polymers like polypyrrole and polyaniline are efficient materials that facilitate a smooth platform for semiconductor materials like CN due to their chemical and thermal steadiness, greater channeling of electron–hole pairs, with phenomenal conductivity . But recovering the nanosized power photocatalysts is nonaffordable and tedious, increasing the possibility of secondary pollution . So, these problems can be easily resolved by constructing 3D hydrogels using suitable support aid as they can be easily recovered from liquid .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Efficient Na, B, and O Codoped g-C₃N₄/Polypyrrole-Carbon Black 3D Beads for Expeditious Degradation of Tetracycline via Percarbonate Activation

Balakrishnan,

Sasidharan,

Chinthala

et al. 2024

Ind. Eng. Chem. Res.

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A hybrid Na, B, and O codoped g-C 3 N 4 /polypyrrole carbon black (CCNP) hydrogel is prepared via an in situ cross-linking method for percarbonate activation under visible light irradiation. The structural, morphological, and optical characterizations proved the tuned bandgap, enriched utilization of visible light, minimum recombination ratio, and higher separation efficiency. The CCNP hydrogels could easily activate the percarbonate under visible light, leading to abundant production of reactive radicals, which aids in the degradation of tetracycline in wastewater. About 96% of tetracycline was degraded in 15 min at its natural pH. The superoxide, carbonate, and hydroxyl radicals were the important radical species in tetracycline degradation. The CCNP hydrogels also exhibited high photostability and reusability up to six cycles. The tetracycline degradation pathway is given a special focus, and the percarbonate activation mechanism is highlighted. This study provides a new strategy for boosting the performance of g-C 3 N 4 -based catalysts for percarbonate activation and wastewater remediation.

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“…25 The easiness in catalyst recovery and higher reusability are preliminary practical application criteria. 26 The hydrogels are usually entangled via chemical and physical interactions with abundant water content and different polar functional groups. 27 Low-cost carboxymethyl cellulose (CMC) is elected among other biopolymers due to its ability to form 3D structures such as beads, sponges, and aerogels.…”

Section: Introductionmentioning

confidence: 99%

Tailored Citric Acid-Functionalized Carbon Nitride Homojunction-Immobilized Carboxymethyl Cellulose 3D Photocatalytic Hydrogels: A Multifaceted Approach toward Environmental Remediation

Balakrishnan,

Kunnel,

Sasidharan

et al. 2024

ACS Sustainable Chem. Eng.

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The facile development of highly efficient visible light active metal-free homojunction photocatalysts with phenomenal photoelectron migration is emerging as a prominent method for diverse energy and environmental remediation applications. Through an effective cross-linking technique, citric acid-functionalized g-C 3 N 4 homojunction/carboxymethyl cellulose hydrogel beads (ICN/CMC beads) were prepared. The photocatalytic studies of ICN/CMC beads exhibited 87% tetracycline degradation in 40 min under visible light irradiation. The important advantages of ICN/CMC beads are their ease of recovery and reusability of up to 12 cycles. The ICN/CMC beads were capable of producing 2341 μmol of hydrogen peroxide and 501 μmol/h•g of ammonia production in 60 min under visible light irradiation. The predominant catalytic activity is due to the tuned bandgap of the photocatalyst, which facilitated the effective separation of electron−hole pairs and hindered the recombination of charge carriers. Thus, ICN/CMC beads are affordable and sustainable photocatalysts with multimodal applications.

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Immobilized TiO2/chitosan beads for photocatalytic degradation of 2,4-dichlorophenoxyacetic acid

Cited by 76 publications

References 34 publications

Mussel-Inspired Durable TiO₂/PDA-Based Superhydrophobic Paper with Excellent Self-Cleaning, High Chemical Stability, and Efficient Oil/Water Separation Properties

Mussel-Inspired Durable TiO₂/PDA-Based Superhydrophobic Paper with Excellent Self-Cleaning, High Chemical Stability, and Efficient Oil/Water Separation Properties

Fabrication of Efficient Na, B, and O Codoped g-C₃N₄/Polypyrrole-Carbon Black 3D Beads for Expeditious Degradation of Tetracycline via Percarbonate Activation

Tailored Citric Acid-Functionalized Carbon Nitride Homojunction-Immobilized Carboxymethyl Cellulose 3D Photocatalytic Hydrogels: A Multifaceted Approach toward Environmental Remediation

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Immobilized TiO2/chitosan beads for photocatalytic degradation of 2,4-dichlorophenoxyacetic acid

Cited by 76 publications

References 34 publications

Mussel-Inspired Durable TiO2/PDA-Based Superhydrophobic Paper with Excellent Self-Cleaning, High Chemical Stability, and Efficient Oil/Water Separation Properties

Mussel-Inspired Durable TiO2/PDA-Based Superhydrophobic Paper with Excellent Self-Cleaning, High Chemical Stability, and Efficient Oil/Water Separation Properties

Fabrication of Efficient Na, B, and O Codoped g-C3N4/Polypyrrole-Carbon Black 3D Beads for Expeditious Degradation of Tetracycline via Percarbonate Activation

Tailored Citric Acid-Functionalized Carbon Nitride Homojunction-Immobilized Carboxymethyl Cellulose 3D Photocatalytic Hydrogels: A Multifaceted Approach toward Environmental Remediation

Contact Info

Product

Resources

About

Mussel-Inspired Durable TiO₂/PDA-Based Superhydrophobic Paper with Excellent Self-Cleaning, High Chemical Stability, and Efficient Oil/Water Separation Properties

Mussel-Inspired Durable TiO₂/PDA-Based Superhydrophobic Paper with Excellent Self-Cleaning, High Chemical Stability, and Efficient Oil/Water Separation Properties

Fabrication of Efficient Na, B, and O Codoped g-C₃N₄/Polypyrrole-Carbon Black 3D Beads for Expeditious Degradation of Tetracycline via Percarbonate Activation