Graphene quantum dots/bisulfite assisted chemiluminescence of rhodamine B-H₂O₂ system for sensitive recognition of HCHO

Khataee, Alireza,Hassanzadeh, Javad,Lotfi, Roya,Joo, Sang Woo Elsevier Sequoia 2018 Sensors and actuators. B Chemical Vol.254 No.-

<P><B>Abstract</B></P> <P>A novel and powerful chemiluminescence (CL) system was developed based on the promoting effect of graphene quantum dots (GQDs)/bisulfite on rhodamine B (RB)-H<SUB>2</SUB>O<SUB>2</SUB> CL reaction. GQDs were synthesized by a simple, green and affordable approach and characterized using their distinctive absorption and emission patterns. X-ray diffraction (XRD), Fourier transform infrared (FT-IR) transmission and transmission electron microscopy (TEM) analysis were implemented for complementary studies on the structural and morphological characteristics of GQDs. The simultaneous enhancing effect of the synthesized GQDs and bisulfite on the CL emission of RB-H<SUB>2</SUB>O<SUB>2</SUB> reaction provided a more strong and efficient CL system. The mechanism of CL emission was described. Furthermore, HCHO as a well-known pollutant, could selectively diminish the developed CL system. This effect was linearly proportional to HCHO concentration which turned the introduced CL system to a susceptible chemosensor for HCHO. Under the optimized operational condition, the linear changing of CL response was obtained in HCHO concentration ranges of 0.02–5μgL<SUP>−1</SUP> and 5–11μgL<SUP>−1</SUP>, with limit of detection (LOD) and quantification (LOQ) of 6ngL<SUP>−1</SUP> and 20ngL<SUP>−1</SUP>, respectively. Ultimately, presented CL chemosensor was served as an accurate tool for determination of formaldehyde concentration in water and wastewater samples.</P> <P><B>Highlights</B></P> <P> <UL> <LI> GQDs and bisulfite can simultaneously enhance the CL emission of RB-H<SUB>2</SUB>O<SUB>2</SUB> reaction. </LI> <LI> RB-H<SUB>2</SUB>O<SUB>2</SUB>-GQDs-SDS-bisulfite system provides a strong and beneficial CL emission. </LI> <LI> HCHO can selectively diminish the emission of developed CL system. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Modeling and optimization of photocatalytic/photoassisted-electro-Fenton like degradation of phenol using a neural network coupled with genetic algorithm

Khataee, A.R.,Fathinia, M.,Zarei, M.,Izadkhah, B.,Joo, S.W. Korean Society of Industrial and Engineering Chemi 2014 Journal of industrial and engineering chemistry Vol.20 No.4

Oxidation of phenol in aqueous media using supported TiO<SUB>2</SUB> nanoparticles coupled with photoelectro-Fenton-like process using Mn<SUP>2+</SUP> cations as catalyst of electro-Fenton reaction was studied. The influence of the basic operational parameters such as initial pH of the solution, applied current, initial Mn<SUP>2+</SUP> concentration, initial phenol concentration and kind of ultraviolet (UV) light on the oxidizing efficiency of phenol was studied. An artificial neural network (ANN) model was coupled with genetic algorithm to predict phenol oxidizing efficiency and to find an optimal condition for maximum phenol removal. The findings indicated that ANN provided reasonable predictive performance (R<SUP>2</SUP>=0.949).

Synthesis and Characterization of Dysprosium-Doped ZnO Nanoparticles for Photocatalysis of a Textile Dye under Visible Light Irradiation

Khataee, Alireza,Darvishi Cheshmeh Soltani, Reza,Hanifehpour, Younes,Safarpour, Mahdie,Gholipour Ranjbar, Habib,Joo, Sang Woo American Chemical Society 2014 INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH - Vol.53 No.5

<P>Dy-doped ZnO nanoparticles were synthesized with a sonochemical method. X-ray diffraction, inductively coupled plasma, Fourier transform infrared spectroscopy, UV–vis diffuse reflectance spectroscopy, and scanning electron microscopy analyses confirmed the successfully synthesis and nanometric diameter of the samples. Dy-doped ZnO nanoparticles were used for photocatalytic decolorization of C. I. Acid Red 17 solution under visible light irradiation. Among different amounts of dopant agent, 3% Dy-doped ZnO nanoparticles indicated the highest decolorization. Decolorization efficiency increased from 14.3 to 57.0% with an increase in catalyst dosage from 0.25 to 1 g/L, while further increment in the catalyst dosage up to 2 g/L caused an obvious decrease in decolorization efficiency. The addition of 0.1 mM peroxydisulfate (S<SUB>2</SUB>O<SUB>8</SUB><SUP>2–</SUP>) resulted in a decolorization efficiency of nearly 100% after irradiation for 180 min. The trend of inhibitory effect in the presence of different radical scavengers was Cl<SUP>–</SUP> > C<SUB>2</SUB>H<SUB>5</SUB>OH > HCO<SUB>3</SUB><SUP>–</SUP> > CO<SUB>3</SUB><SUP>2–</SUP>.</P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ie402743u'>ACS Electronic Supporting Info</A></P>

CuO nanosheets-enhanced flow-injection chemiluminescence system for determination of vancomycin in water, pharmaceutical and human serum

Khataee, A.R.,Hasanzadeh, A.,Iranifam, M.,Fathinia, M.,Hanifehpour, Y.,Joo, S.W. Pergamon 2014 Spectrochimica acta. Part A, Molecular and biomole Vol.122 No.-

A novel, rapid and sensitive CuO nanosheets (NSs) amplified flow-injection chemiluminescence (CL) system, luminol-H<SUB>2</SUB>O<SUB>2</SUB>-CuO nanosheets, was developed for determination of the vancomycin hydrochloride for the first time. It was found that vancomycin could efficiently inhibit the CL intensity of luminol-H<SUB>2</SUB>O<SUB>2</SUB>-CuO nanosheets system in alkaline medium. Under the optimum conditions, the inhibited CL intensity was linearly proportional to the concentration of vancomycin over the ranges of 0.5-18.0 and 18.0-40.0mgL<SUP>-1</SUP>, with a detection limit (3σ) of 0.1mgL<SUP>-1</SUP>. The precision was calculated by analyzing samples containing 5.0mgL<SUP>-1</SUP> vancomycin (n=11) and the relative standard deviation (RSD) was 2.8%. Also, a high injection throughput of 120 sample h<SUP>-1</SUP> was obtained. The CuO nanosheets were synthesized by a sonochemical method. Also, X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses were employed to characterize the CuO nanosheets. The method was successfully employed to determine vancomycin hydrochloride in environmental water samples, pharmaceutical formulation and spiked human serum.

Kinetic modeling of photoassisted-electrochemical process for degradation of an azo dye using boron-doped diamond anode and cathode with carbon nanotubes

Khataee, A.,Khataee, A.,Fathinia, M.,Vahid, B.,Joo, S.W. Korean Society of Industrial and Engineering Chemi 2013 Journal of industrial and engineering chemistry Vol.19 No.6

To well describe the photoassisted-electrochemical process for treatment of the contaminated water, a new kinetic model was established based on the intrinsic reactions of the process. The kinetic model correlated apparent kinetic constants to operational parameters including applied current, initial dye concentration and flow rate. Degradation experiments were carried out with boron-doped diamond (BDD) anode and carbon nanotubes-polytetrafluoroethylene (CNTs-PTFE) cathode. The proposed kinetic model was validated by the experiments of C.I. Acid Blue 92 degradation in aqueous solution. The goodness of fitting (R<SUP>2</SUP>=0.96) demonstrated that the new model could describe both the kinetics and the hydrodynamics of the photo-electrochemical system.

Simultaneous monitoring of photocatalysis of three pharmaceuticals by immobilized TiO₂ nanoparticles: Chemometric assessment, intermediates identification and ecotoxicological evaluation

Khataee, A.R.,Fathinia, M.,Joo, S.W. Pergamon 2013 Spectrochimica acta. Part A, Molecular and biomole Vol.112 No.-

<P>In this study, the photocatalytic degradation of a mixture of three pharmaceuticals, Metronidazole (MET), Atenolol (ATL) and Chlorpromazine (CPR), was quantified simultaneously during the UV/TiO2 process. The investigated TiO2 was Millennium PC-500 immobilized on ceramic plates by sol-gel based method. The partial least squares modeling was successfully applied for the multivariate calibration of the spectrophotometric data. The central composite design was applied to model and optimize the UV/TiO2 process. Predicted values of removal efficiency were found to be in good agreement with experimental values for MET, ATL and CPR (R-2 = 0.947 and Adj-R-2 = 0.906, R-2 = 0.977 and Adj-R-2 = 0.960 and R-2 = 0.982 and Adj-R-2 = 0.969, respectively). The optimum initial concentration of pharmaceuticals, reaction time and UV light intensity was found to be 10 mg L-1, 150 min and 38.45 W m(-2), respectively. The main degradation intermediates of pharmaceuticals produced in this process were identified by GC-MS technique. The chronic ecotoxicity of pharmaceuticals was evaluated using aquatic species Spirodela polyrrhiza prior to and after photocatalysis. The TOC results (90% removal after 16 h) and ecotoxicological experiments revealed that the photocatalysis process could effectively mineralize and reduce the ecotoxicity of the pharmaceuticals from their aqueous solutions. (C) 2013 Elsevier B.V. All rights reserved.</P>

One-step preparation of nanostructured martite catalyst and graphite electrode by glow discharge plasma for heterogeneous electro-Fenton like process

Khataee, A.,Sajjadi, S.,Hasanzadeh, A.,Vahid, B.,Joo, S.W. Academic Press 2017 Journal of environmental management Vol.199 No.-

<P>Natural Martite ore particles and graphite were modified by alternating current (AC) glow discharge plasma to form nanostructured catalyst and cathode electrode for using in the heterogeneous-electro Fenton-like (Het-EF-like) process. The performance of the plasma-treated martite (PTM) and graphite electrode (PTGE) was studied for the treatment of paraquat herbicide in a batch system. 85.78% degradation efficiency for 20 mg L-1 paraquat was achieved in the modified process under desired operational conditions (i.e. current intensity of 300 mA, catalyst amount of 1 g L-1, pH = 6, and background electrolyte (Na2SO4) concentration of 0.05 mol L-1) which was higher than the 41.03% for the unmodified one after 150 min of treatment. The ecofriendly modification of the martite particles and the graphite electrode, no chemical needed, low leached iron and milder operational pH were the main privileges of plasma utilization. Moreover, the degradation efficiency through the process was not declined after five repeated cycles at the optimized conditions, which proved the stability of the nanostructured PTM and PTGE in the long-term usage. The archived results exhibit this method is the first example of high efficient, cost-effective, and environment-friendly method for generation of nanostructured samples. (C) 2017 Elsevier Ltd. All rights reserved.</P>

Kinetic modeling of sonocatalytic performance of Gd-doped CdSe nanoparticles for degradation of Acid Blue 5

Khataee, Alireza,Karimi, Atefeh,Hasanzadeh, Aliyeh,Joo, Sang Woo Elsevier 2017 Ultrasonics sonochemistry Vol.39 No.-

<P><B>Abstract</B></P> <P>CdSe and Gd-doped CdSe nanoparticles were synthesized using a simple hydrothermal method, and their catalytic activity was examined toward degradation of Acid Blue 5 (AB5) in the sonocatalytic process. The structure and morphology of as-prepared nanomaterials were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Branauer, Emmett and Teller (BET) and Fourier infrared spectroscopy (FT-IR) techniques. Among the synthesized samples, 4% Gd-doped CdSe nanoparticles demonstrated the highest catalytic activity with band gap energy of 1.61eV. The effect of dopant content, initial dye concentration, catalyst dosage, ultrasonic power and inorganic radical scavengers on the degradation efficacy of AB5 was evaluated. The produced intermediates of AB5 degradation during sonocatalytic process were verified using gas chromatography–mass spectroscopy (GC–MS) technique. A novel intrinsic kinetic model for prediction of AB5 degradation efficiency was proposed. A good agreement was obtained between developed model and experimental data (R<SUP>2</SUP> >0.94).</P> <P><B>Highlights</B></P> <P> <UL> <LI> Synthesis of CdSe and Gd-doped CdSe nanoparticles via hydrothermal method. </LI> <LI> Sonocatalytic degradation of AB5 using Gd-doped CdSe nanoparticles. </LI> <LI> Development of a novel intrinsic kinetic model for prediction of AB5 degradation efficiency. </LI> <LI> Determination of intermediates to propose a possible dye degradation pathway. </LI> </UL> </P>

Sonocatalytic performance of Er-doped ZnO for degradation of a textile dye

Khataee, A.,Saadi, S.,Safarpour, M.,Joo, S.W. Elsevier Science 2015 Ultrasonics sonochemistry Vol.27 No.-

Pure and erbium (Er)-doped ZnO samples were synthesized through a sonochemical method and characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-Vis spectroscopy, and X-ray photoelectron spectroscopy (XPS) analysis. The synthesized samples were used as a catalyst for the sonocatalytic decolorization of Reactive Orange 29 (RO29) as a model organic pollutant. The decolorization efficiency was 63%, 68%, 88%, and 75% for undoped, 2%, 4%, and 6% Er-doped ZnO, respectively. The effect of different experimental parameters including catalyst content, dye concentration and ultrasound power was investigated on the sonocatalytic decolorization of RO29. Among several radical scavengers (i.e. chloride, carbonate and sulfate anions and t-butanol), the chloride anion showed the most inhibitive effect on the sonocatalysis performance. Improvement of the sonocatalytic process by K<SUB>2</SUB>S<SUB>2</SUB>O<SUB>8</SUB> and H<SUB>2</SUB>O<SUB>2</SUB> enhancers was also studied. The reusability of the synthesized sonocatalyst was evaluated in several consecutive runs, and a decline of only 4% was observed in the process performance after five runs. The intermediates produced during the degradation of RO29 were identified by GC-MS analysis.

Yb-doped ZnSe nanoparticles: synthesis, physical properties and photocatalytic activity.

Khataee, A R,Hosseini, M,Hanifehpour, Y,Safarpour, M,Joo, S W American Scientific Publishers 2014 Journal of Nanoscience and Nanotechnology Vol.14 No.9

<P>In this study, Yb-doped ZnSe nanoparticles were synthesized by co-reduction method at 150 degrees C and pH = 12 for 24 h. The obtained materials were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Powder XRD patterns indicated that the Yb(x)Zn(1-x)Se crystals (x = 0.00-0.10) are isostructural with ZnSe. SEM and TEM images confirmed doping of Yb3+ into the lattice of ZnSe nanoparticles. The UV-Vis diffuse reflectance characteristics of the Yb-doped ZnSe samples were quite similar to that of the undoped sample and showed a strong photoabsorption at visible light range. The electrical conductivity of Yb-doped ZnSe nanomaterials was higher than pure ZnSe at room temperature, and increased with temperature. The photocatalytic activity of synthesized nanoparticles was investigated by the degradation of Orange II solution under visible light irradiation. It was observed that the color removal efficiency of Yb-doped ZnSe catalyst was much higher than that of pure ZnSe (26.28 and 77.10% after 120 min of treatment for ZnSe and Yb(0.06)Zn(0.94)Se, respectively). The results demonstrated the good photocatalytic ability of synthesized nanoparticles under visible light. Also, it was revealed that the decolorization efficiency of Orange II over Yb-doped ZnSe increased with increasing Yb loading up to 6 mol% and then decreased.</P>