Integrating adsorption and photocatalysis: A cost effective strategy for textile wastewater treatment using hybrid biochar-TiO2 composite

Fazal, Tahir; Razzaq, Abdul; Javed, Fahed; Hafeez, Ainy; Rashid, Naim; Amjad, Um-e-Salma; Rehman, Muhammad Saif Ur; Faisal, Abrar; Rehman, Fahad

doi:10.1016/j.jhazmat.2019.121623

Cited by 200 publications

(79 citation statements)

References 66 publications

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“…FT-IR spectra can be applied to distinguish the functional groups and the degree of carbonization of BC. The band absorbance at 710 cm −1 was a characteristic feature of BC [63]. The peak between 875-1035 cm −1 was associated with C-O and OH-stretching vibration.…”

Section: Structure and Chemical Compositionmentioning

confidence: 95%

“…Furthermore, carbon can dope in the place of oxygen in the TiO 2 lattice [4]. Some researchers [35,62,63,67] have reported the synthesis of BCPs using the in situ method. Brandes et al [67] proposed an in situ approach to insert TiO 2 in the bacterial cellulose matrix.…”

Section: In-situ Methodsmentioning

confidence: 99%

“…Meng et al [92] suggested the synergistic effect between biochar and g-C 3 N 4 resulted in a longer lifetime of excited electrons of semiconductor and hindered photo-induced electron-hole recombination. Fazal et al [63] also found that photodegradation was sensitive to the loading concentration of TiO 2 onto biochar. The photodegradation efficiency was enhanced owing to the reduced charge recombination.…”

Section: Suppression Of Electron-hole Recombinationmentioning

confidence: 95%

“…They found that the crystal structure of the g-MoS 2 /PGBC remains unchanged. Fazal et al [63] used XRD to investigate the BC (macroalgae) and BC-TiO 2 composite. XRD spectra showed that the peak located at 26.9 • and 43 • corresponded to the (002) plane of crystalline carbon, associating with the graphite-like structures.…”

Section: Structure and Chemical Compositionmentioning

confidence: 99%

“…Moreover, the BCPs exhibited a better adsorption effect but weak photocatalytic degradation performance, owing to the poor electron conductivity of the inactivated BC and the serious stacking of MoS 2 . BC can be used as support structure for adsorption molecules and as potent substrate for the growth of TiO 2 photocatalyst on its functionalized surface [63].…”

Section: Adsorptionmentioning

confidence: 99%

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Recent Progress in Biochar-Based Photocatalysts for Wastewater Treatment: Synthesis, Mechanisms, and Applications

Cui

Zhang

et al. 2020

Applied Sciences

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Biochar (BC) is a carbon-rich material produced from pyrolysis of biomass. In addition to its low toxicity, environmental compatibility, and low cost, BC has the desired advantages of well-developed mesoporous structure and abundant surface functional groups. In recent years, BC-based photocatalysts (BCPs) have played a significant role in many environmental fields. In this paper, we highlight the current progress and several exciting results of BCPs by focusing on their synthesis, characterization, mechanisms, and applications in wastewater treatment. Details on various preparation methods include sol–gel, hydrothermal/solvothermal, ultrasound, calcination, and in situ methods are summarized and discussed. The underlying mechanisms and the applications of BCPs for different semiconductors are reviewed. Furthermore, some future trends and potentials are outlined.

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Section: Structure and Chemical Compositionmentioning

confidence: 95%

Section: In-situ Methodsmentioning

confidence: 99%

Section: Suppression Of Electron-hole Recombinationmentioning

confidence: 95%

Section: Structure and Chemical Compositionmentioning

confidence: 99%

Section: Adsorptionmentioning

confidence: 99%

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Recent Progress in Biochar-Based Photocatalysts for Wastewater Treatment: Synthesis, Mechanisms, and Applications

Cui

Zhang

et al. 2020

Applied Sciences

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Conversion of spent coffee grounds to biochar as promising TiO₂ support for effective degradation of diclofenac in water

Lazarotto

Brombilla

Silvestri

et al. 2020

Applied Organom Chemis

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A novel composite, biochar derived from spent coffee grounds with immobilized TiO2 (biochar–TiO2) was prepared, characterized, and applied as an alternative, effective, and sustainable photocatalyst for degrading diclofenac from aqueous solution. Composites with different mass ratios between TiO2 and biochar were prepared by mechanical mixing and subsequent pyrolysis in an inert atmosphere of N2 at 650°C. The sample with biochar–TiO2 ratio of 1:1 presented a degradation efficiency of 90% at just 120 min versus 40% for TiO2 used as reference. This fact is associated with a set of intrinsic characteristics obtained during the formation of the composite, such as superior pore size, avoiding the recombination of the ē/h+ pair, bandgap reduction, and promotion of reactive oxygen species due to phenolic groups present on the biochar surface. The dominant reactive species involved during the photocatalytic degradation of diclofenac were h+ and •OH. The diclofenac degradation pathways were determined based on the identification of intermediates and nonpurgeable organic carbon (NPOC) analysis. The novel biochar–TiO2 composite prepared in this work showed high physical–chemical stability and efficiency over five consecutive cycles of reuse, proving to be a highly promising photocatalyst for degrading diclofenac in water.

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Lignin‐Derived Sustainable Nano‐Platforms: A Multifunctional Solution for an Efficient Dye Removal

Rahimihaghighi,

Gigli,

Ficca

et al. 2024

ChemSusChem

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In contrast to conventional non‐biobased adsorbents, lignin emerges as a cost‐effective and environmentally benign alternative for water treatment. This study identifies unexpected and unpredicted multifunctional properties of lignin nanoparticles (LNPs). LNPs, which are prepared by simple physical processes, demonstrated for the first time to behave as multifunctional materials able to adsorb and photodegrade methylene blue (MB) in aqueous medium upon UV irradiation. Furthermore, the synthetic approach adopted to synthesize LNPs – and therefore their surface properties – strongly affects their performances. More specifically, LNPs obtained by solvent‐antisolvent nanoprecipitation (SLNPs) show the highest MB adsorption properties (98% removal), reaching a maximum adsorption capacity of 43 mg g‐1, and the fastest adsorption kinetics with respect to other lignin‐based adsorbents. Conversely, hydrotropic LNPs (HLNPs) exhibit exceptional photocatalytic activity, resulting in 98% MB degradation over 6 hours of UV irradiation, combined with the ability to be easily recycled and reused. The present effort paves the way for the use of LNPs as efficient multifunctional materials able to perform concurrently adsorption and photocatalytic degradation of dye pollutants, toward the creation of a sustainable biobased water treatment platform.

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Integrating adsorption and photocatalysis: A cost effective strategy for textile wastewater treatment using hybrid biochar-TiO2 composite

Cited by 200 publications

References 66 publications

Recent Progress in Biochar-Based Photocatalysts for Wastewater Treatment: Synthesis, Mechanisms, and Applications

Recent Progress in Biochar-Based Photocatalysts for Wastewater Treatment: Synthesis, Mechanisms, and Applications

Conversion of spent coffee grounds to biochar as promising TiO₂ support for effective degradation of diclofenac in water

Lignin‐Derived Sustainable Nano‐Platforms: A Multifunctional Solution for an Efficient Dye Removal

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Integrating adsorption and photocatalysis: A cost effective strategy for textile wastewater treatment using hybrid biochar-TiO2 composite

Cited by 200 publications

References 66 publications

Recent Progress in Biochar-Based Photocatalysts for Wastewater Treatment: Synthesis, Mechanisms, and Applications

Recent Progress in Biochar-Based Photocatalysts for Wastewater Treatment: Synthesis, Mechanisms, and Applications

Conversion of spent coffee grounds to biochar as promising TiO2 support for effective degradation of diclofenac in water

Lignin‐Derived Sustainable Nano‐Platforms: A Multifunctional Solution for an Efficient Dye Removal

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Conversion of spent coffee grounds to biochar as promising TiO₂ support for effective degradation of diclofenac in water