Very fast catalytic reduction of 4-nitrophenol, methylene blue and eosin Y in natural waters using green chemistry: p(tannic acid)–Cu ionic liquid composites

Şahiner, Nurettin; Sagbas, Selin; Aktaş, Nahit

doi:10.1039/c5ra00126a

Cited by 61 publications

(39 citation statements)

References 53 publications

(73 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Activity of Co‐Cu/ZIF catalyst is compared with other catalysts reported previously using the normalized rate constant (k nor = k app /m, where m is total weight of catalyst) confirming higher efficiency of Co‐Cu/ZIF catalyst (Table S2 in ESI) …”

Section: Resultsmentioning

confidence: 57%

“…Activity of Co-Cu/ZIF catalyst is compared with other catalysts reported previously using the normalized rate constant (k nor = k app /m, where m is total weight of catalyst) confirming higher efficiency of Co-Cu/ZIF catalyst ( Table S2 in ESI). [48][49][50][51][52][53][54][55][56][57][58] We also studied application of the Co-Cu/ZIF catalyst in the reduction of structurally different aromatic nitro compounds (Table 1). Results indicated that nitroarenes having electron donating and electron withdrawing groups were reduced very efficiently and produced amines in excellent yields.…”

Section: Catalytic Performancementioning

confidence: 99%

See 1 more Smart Citation

Co/Cu bimetallic ZIF as New heterogeneous catalyst for reduction of nitroarenes and dyes

Naghshbandi

Sansano

2020

Applied Organom Chemis

View full text Add to dashboard Cite

Nowadays one of the great challenges is to design new bimetallic catalysts with enhanced catalytic activity, selectivity and recycling properties. In this work, the preparation of new Co/Cu bimetallic Zeolitic Imidazolate Framework (Co‐Cu/ZIF) as an efficient catalyst for the reduction of nitro compounds and organic dyes is described. Co‐Cu/ZIF was characterized with different techniques such as SEM, TEM, XRD, XPS, TGA, FT‐IR and UV–vis absorption indicating formation of entirely uniform cubic particles. Using this catalyst, structurally different aromatic nitro compounds were reduced efficiently to corresponding amines in excellent yields. Kinetic studies revealed that the reduction rates of nitrophenol isomers follow 3‐NP > 4‐NP > 2‐NP order. The catalytic activity of Co‐Cu/ZIF was further investigated in the reduction of organic dyes such as methyl orange (MO) and rhodamine B (RhB). This catalyst was recycled for at least ten runs in the reduction of 4‐nitrophenol without a noticeable decrease in activity and reused catalyst was characterized.

show abstract

Section: Resultsmentioning

confidence: 57%

Section: Catalytic Performancementioning

confidence: 99%

Co/Cu bimetallic ZIF as New heterogeneous catalyst for reduction of nitroarenes and dyes

Naghshbandi

Sansano

2020

Applied Organom Chemis

View full text Add to dashboard Cite

show abstract

“…4(b). As shown in the UV-Vis spectrum, the peak at 400 nm for the 4-nitrophenolate anion due to existence of NaBH 4 was decreased, whereas the 4-AP peak at 290 nm increased [35]. The time to complete reduction of 4-NP to 4-AP was calculated as 13 min.…”

Section: Catalytic Performances Of P(aptmacl)-m Hydrogelsmentioning

confidence: 99%

“…For example, p(APTMACl)-Co bulk gel completed the reduction of 4-NP in about 28 min, whereas the p(APTMACl) cryogel, and microgel, containing the same amounts of metal nanoparticles, completed the reaction in about 13 and 14 min, respectively. The reduction reaction of 4-NP is generally reported as pseudo first order [28,35], therefore, pseudo-first order kinetics for 4-NP reduction by p(APTMACl)-M (M: Co and Cu) was applied, and the apparent rate constants, k app along with their R 2 values are given in Table 2. The k app values were determined from the slope of the linear plots of ln(C t /C 0 ) versus time, and are illustrated in Fig 4(c).…”

Section: Catalytic Performances Of P(aptmacl)-m Hydrogelsmentioning

confidence: 99%

Ionic liquid hydrogel templates: Bulkgel, cryogel, and microgel to be used for metal nanoparticle preparation and catalysis

Yıldız

Şahiner

2015

European Polymer Journal

Self Cite

View full text Add to dashboard Cite

“…This result confirmed that in 1 min that is the reaction time, in which the reduction reaction completed in the presence of Fe 3 O 4 /Hal-Mel-TEA(IL)-Pd, MNPs had no role in the reduction reaction, but facilitated the separation of the catalyst from the reaction media. www.nature.com/scientificreports www.nature.com/scientificreports/ According to the literature, catalytic reduction of dye by metallic nanoparticles in the presence of excess amount of NaBH 4 is of pseudo-first-order kinetics 31 . The concentration of dye (C t ) in the course of the reduction can be calculated from the absorbance of the dye at its λ max .…”

mentioning

confidence: 99%

Bio-assisted synthesized Pd nanoparticles supported on ionic liquid decorated magnetic halloysite: an efficient catalyst for degradation of dyes

Sadjadi

Mohammadi

Heravi

2020

Sci Rep

View full text Add to dashboard Cite

Using natural materials, i.e. halloysite nanoclay that is a biocompatible naturally occurring clay and Heracleum persicum extract that can serve as a green reducing agent, a novel magnetic catalyst, fe 3 o 4 / Hal-Mel-TEA(IL)-Pd, has been designed and fabricated. To prepare the catalyst, halloysite was first magnetized (magnetic particles with mean diameter of 13.06 ± 3.1 nm) and then surface functionalized with melamine, 1,4 dibromobutane and triethanolamine to provide ionic liquid on the halloysite surface (5 wt%). The latter was then used as a support to immobilize Pd nanoparticles that were reduced by Heracleum persicum extract. The characterization of the catalyst established that the loading of Pd in fe 3 o 4 /Hal-Mel-TEA(IL)-Pd was very low (0.93 wt%) and its specific surface area was 63 m 2 g −1 . Moreover, the catalyst showed magnetic property (Ms = 19.75 emu g −1 ) and could be magnetically separated from the reaction. The catalytic performance of the magnetic catalyst for reductive degradation of methyl orange and rhodamine B in the presence of NaBH 4 in aqueous media was investigated. The activation energy, enthalpy, and entropy for the reduction of methyl orange were estimated as 42.02 kJ mol −1 , 39.40 kJ mol −1 , and −139.06 J mol −1 K −1 , respectively. These values for rhodamine B were calculated as 39.97 kJ mol −1 , 34.33 kJ mol −1 , and −155.18 Jmol −1 K −1 , respectively. notably, fe 3 o 4 /Hal-Mel-TEA(IL)-Pd could be reused for eight reaction runs with negligible loss of the catalytic activity (~3%) and Pd leaching (0.01 wt% of the initial loading).Application of low-cost, biocompatible and available natural compounds for the catalytic purposes has attracted tremendous attention. In this regard, use of halloysite (Hal) that is a dioctahedral 1:1 clay of the kaolin group has received growing interest 1-3 . Apart from high thermal, chemical and mechanical stability, the cylindrical morphology and opposite chemical and electrical properties of inner and outer surfaces of Hal, make it distinguished from other clays and broaden its utility for many applications such as cleaning 4 , adsorbents 5,6 , energy storage, catalysis, flame retardancy 1 , sustainable release of drugs etc. Regarding catalysis, Hal not only can be utilized as a catalyst, but also can be applied as a support for the development of reusable catalysts. To date, various chemical, photochemical and electrochemical transformations such as coupling reactions 7,8 , hydrogenation 9,10 , oxidation have been promoted by using Hal-based catalysts [11][12][13][14][15] . Organic dyes such as methylene blue, rhodamine B (RhB) and methyl orange (MO) are toxic chemicals with potential health threat 16 . The release of these compounds in the industrial waste water has raised many concerns and motivated many studies for the efficient removal of these hazardous pollutants or their conversion into less toxic compounds 17,18 . In this context, several approaches, such as use of adsorbents, photodegradation, electrochemical degradations, membrane p...

show abstract

Very fast catalytic reduction of 4-nitrophenol, methylene blue and eosin Y in natural waters using green chemistry: p(tannic acid)–Cu ionic liquid composites

Abstract: Using tannic acid (TA) as a biopolymer, poly(tannic Acid) (p(TA)) microgels were obtained by cross-linking TA with trimethylolpropane triglycidyl ether (TMPGDE) as cross-linker in a water-in-oil micro emulsion system.

Cited by 61 publications

References 53 publications

Co/Cu bimetallic ZIF as New heterogeneous catalyst for reduction of nitroarenes and dyes

Co/Cu bimetallic ZIF as New heterogeneous catalyst for reduction of nitroarenes and dyes

Ionic liquid hydrogel templates: Bulkgel, cryogel, and microgel to be used for metal nanoparticle preparation and catalysis

Bio-assisted synthesized Pd nanoparticles supported on ionic liquid decorated magnetic halloysite: an efficient catalyst for degradation of dyes

Contact Info

Product

Resources

About