High-Performance Adsorption of 4-Nitrophenol onto Calix[6]arene-Tethered Silica from Aqueous Solutions

Doğan, Murat; Temel, Farabi; Tabakcı, Mustafa

doi:10.1007/s10904-020-01571-0

Cited by 29 publications

(4 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Elimination of nitrophenols from various wastewaters has mostly been realized by adsorption using different kinds of adsorbents such as sand [28], calix [6] arene-tethered silica [29], or activated carbon developed from demineralized kraft lignin [30]. Besides this method, nitrophenols, especially 4-nitrophenol (4-NP), can be successfully degraded by photocatalysis based on the application of various g-C 3 N 4 catalysts.…”

Section: Introductionmentioning

confidence: 99%

Effect of Copper-Modification of g-C3N4 on the Visible-Light-Driven Photocatalytic Oxidation of Nitrophenols

Nguyen Xuan,

Nguyen Thi,

Tran Thuong

et al. 2023

Molecules

View full text Add to dashboard Cite

Graphitic carbon nitride (g-C3N4) has proved to be a promising heterogeneous photocatalyst in the visible range. It can be used, among others, for the oxidative conversion of environmentally harmful nitrophenols occurring in wastewater. However, its photocatalytic activity needs to be enhanced, which can be achieved by modification with various dopants. In our work, copper-modified g-C3N4 was prepared by ultrasonic impregnation of the pristine g-C3N4 synthesized from thiourea. The morphology, microstructure, and optical properties of the photocatalysts were characterized by XRD, FT-IR, DRS, SEM, XPS, and TEM. DRS analysis indicated a slight change in both the CB and the VB energies of Cu/g-C3N4 compared to those of g-C3N4. The efficiency of the photocatalysts prepared was tested by the degradation of nitrophenols. Copper modification caused a sevenfold increase in the rate of 4-nitrophenol degradation in the presence of H2O2 at pH = 3. This dramatic enhancement can be attributed to the synergistic effect of copper and H2O2 in this photocatalytic system. A minor Fenton reaction role was also detected. The reusability of the Cu/g-C3N4 catalyst was demonstrated through five cycles. Copper-modified g-C3N4 with H2O2 proved to be applicable for efficient visible-light-driven photocatalytic oxidative degradation of nitrophenols.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Copper-Modification of g-C3N4 on the Visible-Light-Driven Photocatalytic Oxidation of Nitrophenols

Nguyen Xuan,

Nguyen Thi,

Tran Thuong

et al. 2023

Molecules

View full text Add to dashboard Cite

show abstract

“…The extensive use of aromatic nitro compounds by various industries, such as in the manufacturing of papers, pharmaceuticals, leather, dyes, pesticides and herbicides, has led to environmental contamination of soil and groundwater [1]. As nitroarenes are highly toxic and cancerogenic, various techniques have been employed to reduce their concentrations in water, including physical (e.g., adsorption/desorption processes [2]), chemical (e.g., oxidative degradation [3], photodegradation [4] and catalytic reduction [5]) and biological techniques (e.g., microbial treatment via anaerobic and aerobic biodegradation [6]). An advantage of the catalytic reduction of 4-nitrophenol (4-NPh) is the selective formation of 4-aminophenol (4-APh), which is significantly less toxic and a valuable product since it is an important intermediate in the production of agrochemicals, dyes and drugs, such as paracetamol and phenacetin [7].…”

Section: Introductionmentioning

confidence: 99%

“…Regarding catalyst support materials, it is crucial to improve studies based on alternative low-cost materials coming from recycling streams such as coal fly ash (FA), which are mainly composed of aluminosilicate glass and minor amounts of other materials, including Fe-rich particles such as ferrospheres [28,29] that are easily recovered via magnetic separation [2][3][4]. For example, Gadore and Ahmaruzzamn [30] reviewed the use of FA-based nanocomposites as effective photocatalysts for water remediation; Saputra and co-authors [31] prepared a Co-supported fly ash catalyst to promote phenol oxidation and observed a total degradation after 90 min at 45 • C; Yusuff et al [32] used FA-supported ZnO as a catalyst in biodiesel production from used oil and obtained an 83.2% yield after 180 min at 140 • C; Dong et al [33] used coal fly ash as a Ni-Re catalyst support for CO 2 methanation.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient and Magnetically Recyclable Non-Noble Metal Fly Ash-Based Catalysts for 4-Nitrophenol Reduction

Kuźniarska-Biernacka,

Ferreira,

Monteiro

et al. 2023

Catalysts

View full text Add to dashboard Cite

4-nitrophenol (4-NPh) is a harmful compound produced in large amounts in the chemical industry, and its reduction to aminophenol (4-APh) using noble metals as catalysts is one of the most studied processes. The development of noble metal-free catalysts represents an economic advantage in large-scale applications and contributes to the sustainability of raw materials. Coal fly ash (FA), a major waste stream from coal combustion, contains an easily recoverable magnetic fraction (FAmag sample) composed of Fe-rich particles that could substitute noble metal catalysts in 4-NPh reduction, with the concomitant advantage of being easily recovered via magnetic separation. For this purpose, a new composite material containing copper ferrite nanoparticles (FAmag@CS@CuFe) was prepared via a facile, environmentally friendly and cost-effective method based on three components: FAmag as the core, a biobased polymer chitosan (CS) as the linker and copper ferrite CuFe2O4 nanoparticles (CuFe) as the active sites. The structure, morphology, composition and magnetic properties of the FAmag@CS@CuFe material were studied to assess the efficiency of the preparation. It was found that the biopolymer prevented the aggregation of CuFe nanoparticles and enabled a synergistically outstanding activity towards the reduction of 4-NPh in comparison to the pristine FAmag and bare CuFe nanoparticles. The FAmag@CS@CuFe catalyst showed efficiency and stability in the conversion of 4-NPh of up to 95% in 3 min over four consecutive cycles. Such remarkable catalytic results demonstrate the potential of this catalyst as a substitute for expensive noble metals.

show abstract

“…Endüstriyel atık sulardaki fenolik hidrokarbonlar gibi organik kirliliklerin giderilmesi oldukça zor bir işlemdir. Bu amaçla kimyasal oksidasyon (Wang ve ark., 2021) , solvent ekstraksiyonu (Aydın ve Özcan, 2005;Temel, 2020) ve adsorpsiyon (Aladağlı ve ark., 2015;Dogan ve ark., 2020;Akceylan ve ark., 2021) gibi birçok arıtma teknolojisi kullanılmaktadır. Bu yöntemler arasında, adsorpsiyon yöntemi kolay uygulanabilirliği ve ucuz olması gibi avantajları nedeniyle kirlilik giderme çalışmalarında sıkça kullanılmaktadır.…”

unclassified

Removal of p-Nitrophenol from Aqueous Solutions by Calixarene based Graphene Oxide

ÇENGEL

Temel

2021

Konya Journal of Engineering Sciences

Self Cite

View full text Add to dashboard Cite

In this study, calix[4]arene-based graphene oxide (GO-Epoxy-C[4]CN) was synthesized using graphene oxide (GO), which was obtained from graphite powder by the Hummers method. After GO preparation, it was reacted by (3-glycidyloxypropyl)trimethoxysilane (GPTMS) to get its epoxy (GO-Epoxy). Then, GO-Epoxy-C[4]CN was obtained by immobilization of p-tert-butylcalix [4]arene nitrile derivative onto the GO-Epoxy. Characterizations of synthesized compounds were performed by 1 H NMR and FTIR analysis. The obtained new adsorbent (GO-Epoxy-C[4]CN) was used for the removal of p-nitrophenol (PNP) from wastewater. First of all, comparison studies were carried out using adsorbent and starting compounds, and it was observed that it provided a very high efficiency with 81% adsorption efficiency compared to the others. Then, the effect of pH and concentration on adsorption was investigated. Hence, it was seen that the adsorption was more compatible with the Langmuir isotherm.

show abstract

High-Performance Adsorption of 4-Nitrophenol onto Calix[6]arene-Tethered Silica from Aqueous Solutions

Cited by 29 publications

References 48 publications

Effect of Copper-Modification of g-C3N4 on the Visible-Light-Driven Photocatalytic Oxidation of Nitrophenols

Effect of Copper-Modification of g-C3N4 on the Visible-Light-Driven Photocatalytic Oxidation of Nitrophenols

Highly Efficient and Magnetically Recyclable Non-Noble Metal Fly Ash-Based Catalysts for 4-Nitrophenol Reduction

Removal of p-Nitrophenol from Aqueous Solutions by Calixarene based Graphene Oxide

Contact Info

Product

Resources

About