Preparation and characterization of a novel tetrakis(4-hydroxyphenyl)porphyrin–graphene oxide nanocomposite and application in an optical sensor and determination of mercury ions

Zare‐Dorabei, Rouholah; Rahimi, Rahmatollah; Koohi, Asgar; Zargari, Solmaz

doi:10.1039/c5ra17047h

Cited by 52 publications

(31 citation statements)

References 30 publications

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“…Complexing agents such as EDTA, thiourea and sulfosalcylic acid have a partial reverse effect, and prolonged exposure to them showed no further improvement in reversibility of the optode [38,39]. According to our results, the sensor can be regenerated and reused by exposure to the solution of thiourea (1.0 M) and NaOH (0.1 M).…”

Section: Optode Regenerationmentioning

confidence: 68%

Preparation and characterization of a novel optical chemical sensor for determination of trace amounts of Praseodymium ion by UV/Vis spectrophotometry

Dashtian

Zare‐Dorabei

2017

Sensors and Actuators B: Chemical

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In the present work, a novel optical chemical sensor (optode) was prepared based on impregnation of N, N´-bis (salicylidene)-1, 3-ethylenediamine (BESA) Schiff base into mesoprous SBA-15 paste for determination of trace amounts of Praseodymium (Pr) ion by UV/Vis spectrophotometry. The sensor was fabricated by dip-coating triacetylcellulose membrane into indicator solution. The proposed optical sensor was prepared through a routine procedure and characterized by various techniques such as ATR-FT-IR and SEM analyses. This optode exhibited a linear range of 10 to 190 ng mL-1 for Pr(III) ion concentration with a detection limit of 5.0 ng mL-1. The value of the response time for the newly synthesized optode was within 100 s while depending on the Pr(III) ion concentration. The proposed optode showed low detection limit, fast response time and high selectivity with respect to the group of transition metal ions (Ce 3+ , Nb 3+ , La 3+ , Cr 3+ , Zn 2+ , Hg 2+ , and Fe 2+ ions). The optode was successfully regenerated with a mixture of thiourea and NaOH solution and the response was reversible with the relative standard deviation (R.S.D.) of 1.6%. The optode was stable and stored for at least 17 days without any considerable change in its sensitivity. Finally, the developed optode was applied to determine the Pr(III) ions in spiked samples.

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Section: Optode Regenerationmentioning

confidence: 68%

Preparation and characterization of a novel optical chemical sensor for determination of trace amounts of Praseodymium ion by UV/Vis spectrophotometry

Dashtian

Zare‐Dorabei

2017

Sensors and Actuators B: Chemical

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“…The development and applications of optical sensors or optodes have grown rapidly and they are applied for determination of various analytes, including cationic, anionic, neutral and gaseous species, because of advantages of easy fabrication, good sensitivity and selectivity, well‐controlled experimental conditions and simple sample preparation . Optodes are used in combination with inexpensive spectrophotometric or spectrofluorometric techniques to provide simple and fast determination methods with low detection limits and good selectivity …”

Section: Introductionmentioning

confidence: 99%

Design of a novel optical sensor for determination of trace amounts of copper by UV–visible spectrophotometry in real samples

Pourbasheer

Morsali

Azari

et al. 2017

Applied Organom Chemis

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A new optical chemical sensor is established for sensitive and selective spectrophotometric detection of copper based on the immobilization of 3‐(2‐methyl‐2,3‐dihydro‐1,3‐benzothiezol‐2‐yl)‐2H‐chromen‐2‐one on a triacetylcellulose membrane. Copper ions react with the immobilized ligand and cause an increase in the absorption of the membrane at 550 nm in universal buffer solution at pH = 6. The effects of pH, indicator concentration and reaction time on the immobilization of the ligand were studied. This optode exhibits a linear range of 7.0 × 10−7 to 1 × 10−4 mol l−1 of copper ion concentration with a limit of detection of 3.0 × 10−7 mol l−1. The response time of the newly designed optode is within 3 min. The effect of different possible interfering species was investigated and it was found that the sensor has very good selectivity. The proposed sensor benefits from advantages such as low cost, high stability, low detection limit, fast response time, reproducibility, relatively long lifetime, and good selectivity for Cu2+ ion determination among a large number of alkali, alkaline earth, transition and heavy metal ions. The sensor can readily be regenerated with thiourea solution and its response is reversible and reproducible (relative standard deviation < 1.4%). The proposed optode was applied successfully for the determination of Cu(II) in various samples.

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“…However, such groups cannot provide strong interaction with heavy metals as much as nitrogencontaining functional groups [15]. Therefore, in many researches, it is attempted to modify GO with multifunctional molecules such as polymers [15][16][17][18][19], multidentate chelating ligand [20][21][22], to improve adsorption efficiency. Using selective ligand toward metal ions such as pyridine-containing ligand, can be improved capacity and selectivity of adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient simultaneous ultrasonic-assisted adsorption of Pb(II), Cd(II), Ni(II) and Cu (II) ions from aqueous solutions by graphene oxide modified with 2,2′-dipyridylamine: Central composite design optimization

Zare‐Dorabei

Ferdowsi

Barzin

et al. 2016

Ultrasonics Sonochemistry

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In present work, a graphene oxide chemically modified with 2,2'-dipyridylamine (GO-DPA), was synthesized by simple, fast and low-cost process for the simultaneous adsorption of four toxic heavy metals, Pb(II), Cd(II), Ni(II) and Cu(II), from aqueous solutions. The synthesized adsorbent was characterized by FT-IR, XRD, XPS, SEM and AFM measurements. The effects of variables such as pH solution, initial ion concentrations, adsorbent dosage and sonicating time were investigated on adsorption efficiency by rotatable central composite design. The optimum conditions, specified as 8mg of adsorbent, 20mgL(-1) of each ion at pH 5 and short time of 4min led to the achievement of a high adsorption capacities. Ultrasonic power had important role in shortening the adsorption time of ions by enhancing the dispersion of adsorbent in solution. The adsorption kinetic studies and equilibrium isotherms for evaluating the mechanism of adsorption process showed a good fit to the pseudo-second order and Langmuir model, respectively. The maximum adsorption capacities (Qm) of this adsorbent were 369.749, 257.201, 180.893 and 358.824mgg(-1) for lead, cadmium, nickel and copper ions, respectively. The removal performance of adsorbent on the real wastewater samples also showed the feasibility of adsorbent for applying in industrial purposes.

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Preparation and characterization of a novel tetrakis(4-hydroxyphenyl)porphyrin–graphene oxide nanocomposite and application in an optical sensor and determination of mercury ions

Abstract: Optical chemical sensor for determination of mercury ions.

Cited by 52 publications

References 30 publications

Preparation and characterization of a novel optical chemical sensor for determination of trace amounts of Praseodymium ion by UV/Vis spectrophotometry

Preparation and characterization of a novel optical chemical sensor for determination of trace amounts of Praseodymium ion by UV/Vis spectrophotometry

Design of a novel optical sensor for determination of trace amounts of copper by UV–visible spectrophotometry in real samples

Highly efficient simultaneous ultrasonic-assisted adsorption of Pb(II), Cd(II), Ni(II) and Cu (II) ions from aqueous solutions by graphene oxide modified with 2,2′-dipyridylamine: Central composite design optimization

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