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Editorial Of Special Issue: Nanomaterials As Photocatalysts, Mohammad Mansoob Khan Dr
Editorial Of Special Issue: Nanomaterials As Photocatalysts, Mohammad Mansoob Khan Dr
Dr. Mohammad Mansoob Khan
This thematic special issue entitled “Nanomaterials as Photocatalysts” based on selected research/review articles submitted to the Journal of Saudi Chemical Society focuses on the visible/UV light photocatalytic activities of the selected nanomaterials. Topics of these research/review articles cover diverse and exciting areas of research related to nanomaterials such as metal oxides, nanoparticles, nanocomposites, their synthesis, and photocatalysis for waste water treatment, photocatalysis for effective conversion of waste, photochemical conversions, energy generation and other chemical energy production.
Electrically Conductive Polyaniline Sensitized Defective-Tio2 For Improved Visible Light Photocatalytic And Photoelectrochemical Performance: A Synergistic Effect, M O. Ansari, Mohammad Mansoob Khan Dr, S A. Ansari, M H. Cho
Electrically Conductive Polyaniline Sensitized Defective-Tio2 For Improved Visible Light Photocatalytic And Photoelectrochemical Performance: A Synergistic Effect, M O. Ansari, Mohammad Mansoob Khan Dr, S A. Ansari, M H. Cho
Dr. Mohammad Mansoob Khan
Sulfonated polyaniline@pure-TiO2 (s-Pani@p-TiO2) and polyaniline@defective-TiO2 (s-Pani@m-TiO2) nanocomposites were prepared by the in-situ oxidative polymerization of aniline in the presence of TiO2 (p-TiO2 and m-TiO2) nanoparticles followed by sulfonation with fuming sulfuric acid. Defect-induced TiO2 (m-TiO2) nanoparticles were obtained by an electron beam (EB) treatment of commercial TiO2 (p-TiO2) nanoparticles. The resulting s-Pani@p-TiO2 and s-Pani@m-TiO2 nanocomposites were characterized by UV-visible diffuse absorbance spectroscopy, photoluminescence spectroscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Polyaniline (Pani) was dispersed uniformly over the defective m-TiO2 surface with intimate contact on the interface to act cooperatively with the defects introduced deliberately to achieve remarkably …
Biogenic Synthesis Of A Ag–Graphene Nanocomposite With Efficient Photocatalytic Degradation, Electrical Conductivity And Photoelectrochemical Performance, Mohammad Mansoob Khan Dr, Mohammad Ehtisham Khan, M. H. Cho Prof
Biogenic Synthesis Of A Ag–Graphene Nanocomposite With Efficient Photocatalytic Degradation, Electrical Conductivity And Photoelectrochemical Performance, Mohammad Mansoob Khan Dr, Mohammad Ehtisham Khan, M. H. Cho Prof
Dr. Mohammad Mansoob Khan
This paper reports the environmentally benign, simple, cost efficient, one-step, surfactant free, and biogenic synthesis of silver-graphene (Ag-Graphene) nanocomposite using an electrochemically active biofilm (EAB). The EAB was used for the reduction of Ag+ to Ag0 onto the graphene sheets. The morphology, structure, composition, and optical properties and contact angle of the Ag-Graphene were obtained using a range of techniques which confirmed the anchoring/presence of silver nanoparticles (AgNPs) onto the graphene sheets. The photocatalytic activity of the Ag-Graphene was evaluated by the degradation of methylene blue and Congo red dye in aqueous solution at an ambient temperature in dark and …
Polythiophene Nanocomposites For Photodegradation Applications: Past, Present And Future, Mohammad Mansoob Khan Dr, M. O. Ansari, S. A. Ansari, M. H. Cho
Polythiophene Nanocomposites For Photodegradation Applications: Past, Present And Future, Mohammad Mansoob Khan Dr, M. O. Ansari, S. A. Ansari, M. H. Cho
Dr. Mohammad Mansoob Khan
Polythiophene (PTh) has been the subject of considerable interest because of its good environmental stability, unique redox electrical behavior, stability in doped and neutral states, ease of synthesis, and wide range of applications in many fields. Apart from its applications in the electrical or electronic field, PTh has shown promising applications in photocatalytic degradation. The fabrication of a catalyst, metal oxides with PTh, extends the absorption range of the modified composite system, thereby enhancing the photocatalytic activity under UV or visible light irradiation. Substituted PTh, such as alkyl substitution, modifies the electronic properties of the polymer, thereby enlarging the potential …
Zno/Cdo Nanocomposites For Textile Effluent Degradation And Electrochemical Detection, Mohammad Mansoob Khan Dr
Zno/Cdo Nanocomposites For Textile Effluent Degradation And Electrochemical Detection, Mohammad Mansoob Khan Dr
Dr. Mohammad Mansoob Khan
In this report, the photocatalytic and electrochemical activity of ZnO and ZnO/CdO nanocomposites were determined. Pure ZnO and nanocomposite ZnO/CdO were prepared by a vapor to solid mechanism and were characterized by different physical and chemical techniques. The CdO-modified ZnO possessed high efficiency to degrade textile effluent. It also showed high efficiency of degradation, such as 98% for methylene blue and 93% for methyl orange. Cadmium oxide (impurity) plays an important role in achieving zinc oxide materials that exhibit UV to visible light degradation of textile effluent. Additionally, uric acid sensing performed to study the electrochemical activity revealed that ZnO/CdO …
Silver Nanoparticles And Defect-Induced Visible Light Photocatalytic And Photoelectrochemical Performance Of Ag@M-Tio2 Nanocomposite, Mohammad Mansoob Khan Dr, S. A. Ansari, M. O. Ansari, M. H. Cho
Silver Nanoparticles And Defect-Induced Visible Light Photocatalytic And Photoelectrochemical Performance Of Ag@M-Tio2 Nanocomposite, Mohammad Mansoob Khan Dr, S. A. Ansari, M. O. Ansari, M. H. Cho
Dr. Mohammad Mansoob Khan
An electrochemically active biofilm-assisted visible light active Ag@m-TiO2 photocatalyst was fabricated. The resulting nanocomposite was characterized by X-ray diffraction, transmission electron microscopy, diffuse absorbance/reflectance spectroscopy, photoluminescence spectroscopy, and X-ray photoelectron spectroscopy. The photocatalyst showed high photocatalytic activity and photoelectrochemical behavior due to the synergistic effect of the surface plasmon resonance (SPR) of Ag nanoparticles (AgNPs) and the induced defects in TiO2 (m-TiO2) nanoparticles. Ag@m-TiO2 nanocomposite showed much higher light harvesting ability because of the reduced band gap of m-TiO2 as well as the SPR characteristics of the AgNPs. The visible light photocatalytic experiments showed that the Ag@m-TiO2 nanocomposite possessed excellent …
Metal Oxides As Photocatalysts, Mohammad Mansoob Khan Dr
Metal Oxides As Photocatalysts, Mohammad Mansoob Khan Dr
Dr. Mohammad Mansoob Khan
Metal oxides are of great technological importance in environmental remediation and electronics because of their capability to generate charge carriers when stimulated with required amount of energy. The promising arrangement of electronic structure, light absorption properties, and charge transport characteristics of most of the metal oxides has made possible its application as photocatalyst. In this article definition of metal oxides as photocatalyst, structural characteristics, requirements of the photocatalyst, classification of photocatalysts and the mechanism of the photocatalytic process are discussed.
Zno/Ag/Cdo Nanocomposite For Visible Light-Induced Photocatalytic Degradation Of Industrial Textile Effluents, Mohammad Mansoob Khan Dr
Zno/Ag/Cdo Nanocomposite For Visible Light-Induced Photocatalytic Degradation Of Industrial Textile Effluents, Mohammad Mansoob Khan Dr
Dr. Mohammad Mansoob Khan
A ternary ZnO/Ag/CdO nanocomposite was synthesized using thermal decomposition method. The resulting nanocomposite was characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, UV–Vis spectroscopy, and X-ray photoelectron spectroscopy. The ZnO/Ag/CdO nanocomposite exhibited enhanced photocatalytic activity under visible light irradiation for the degradation of methyl orange and methylene blue compared with binary ZnO/Ag and ZnO/CdO nanocomposites. The ZnO/Ag/CdO nanocomposite was also used for the degradation of the industrial textile effluent (real sample analysis) and degraded more than 90% in 210 min under visible light irradiation. The small size, high surface area and synergistic effect in the ZnO/Ag/CdO …
Dc Electrical Conductivity Retention And Electrical Compensation Of Polyaniline By Tio2 At Higher Loading Percentages In Polyaniline@Tio2 Nanocomposites, Mohammad Mansoob Khan Dr, M. O. Ansari, S. A. Ansari, M. H. Cho
Dc Electrical Conductivity Retention And Electrical Compensation Of Polyaniline By Tio2 At Higher Loading Percentages In Polyaniline@Tio2 Nanocomposites, Mohammad Mansoob Khan Dr, M. O. Ansari, S. A. Ansari, M. H. Cho
Dr. Mohammad Mansoob Khan
Electrically conductive HCl-doped polyaniline Pani)@titanium dioxide (TiO2) nanocomposites were prepared by the in-situ oxidative polymerization of aniline in the presence of different amounts of TiO2 nanoparticles. The synthesized Pani@TiO2 nanocomposites were confirmed by transmission electron microscopy, X-ray diffraction, UV-visible spectroscopy, and thermogravimetric analysis. The stability of the Pani@TiO2 nanocomposites in terms of their electrical conductivity retention was examined under isothermal and cyclic aging conditions, and compared with that of pure Pani. The Pani@TiO2 nanocomposites showed higher thermal stability than pure Pani. The effect of competitive doping/de-doping by TiO2 was examined at different Pani to TiO2 weight ratios. TiO2 at a …
Zno/Ag/Mn2o3 Nanocomposite For Visible Lightinduced Industrial Textile Effluent Degradation, Uric Acid And Ascorbic Acid Sensing And Antimicrobial Activity, Mohammad Mansoob Khan Dr
Zno/Ag/Mn2o3 Nanocomposite For Visible Lightinduced Industrial Textile Effluent Degradation, Uric Acid And Ascorbic Acid Sensing And Antimicrobial Activity, Mohammad Mansoob Khan Dr
Dr. Mohammad Mansoob Khan
A facile and inexpensive route has been developed to synthesize a ternary ZnO/Ag/Mn2O3 nanocomposite having nanorod structures based on the thermal decomposition method. The as-synthesized ternary ZnO/Ag/Mn2O3 nanocomposite was characterized and used for visible light-induced photocatalytic, sensing and antimicrobial studies. The ternary ZnO/Ag/Mn2O3 nanocomposite exhibited excellent and enhanced visible light-induced photocatalytic degradation of industrial textile effluent (real sample analysis) compared to pure ZnO. Sensing studies showed that the ternary ZnO/Ag/Mn2O3 nanocomposite exhibited outstanding and improved detection of uric acid (UA) and ascorbic acid (AA). It also showed effective and efficient bactericidal activities against Staphylococcus aureus and Escherichia coli. These results …
Gold Nanoparticles-Sensitized Wide And Narrow Band Gap Tio2 For Visible Light Applications: A Comparative Study, Mohammad Mansoob Khan Dr
Gold Nanoparticles-Sensitized Wide And Narrow Band Gap Tio2 For Visible Light Applications: A Comparative Study, Mohammad Mansoob Khan Dr
Dr. Mohammad Mansoob Khan
Gold nanoparticles (AuNPs)-sensitized wide band gap TiO2 (Au/P-TiO2) and narrow band gap TiO2 (Au/M-TiO2) nanocomposites were prepared using an electrochemically active biofilm. The optical and structural properties of the Au/P-TiO2 and Au/M-TiO2 nanocomposites were characterized using standard techniques. The surface plasmon resonance (SPR) absorption characteristics of the AuNPs on the TiO2 surface extended the absorption edge of P-TiO2 and M-TiO2 to the visible light region. The photocatalytic activity of the Au/P-TiO2 and Au/M-TiO2 nanocomposites was evaluated by the photodegradation of methylene blue and methyl orange, and 2-chlorophenol under visible light irradiation, where Au/M-TiO2 nanocomposite exhibited enhanced photocatalytic activity compared to …
Improved Electrode Performance In Microbial Fuel Cells And The Enhanced Visible Light-Induced Photoelectrochemical Behaviour Of Ptox@M-Tio2 Nanocomposites, Mohammad Mansoob Khan Dr
Improved Electrode Performance In Microbial Fuel Cells And The Enhanced Visible Light-Induced Photoelectrochemical Behaviour Of Ptox@M-Tio2 Nanocomposites, Mohammad Mansoob Khan Dr
Dr. Mohammad Mansoob Khan
Visible light active PtOx@M-TiO2 and PtOx@P-TiO2 (x = 0, 1 and 2) nanocomposites were fabricated via a simple, green and environmentally benign process using an electrochemically active biofilm. The formation of the PtOx@M-TiO2 and PtOx@P-TiO2 nanocomposites was confirmed by X-ray diffraction, ultraviolet–visible–near infrared spectrophotometry, photoluminescence spectroscopy, and X-ray photoelectron spectroscopy (XPS). XPS revealed the presence of Pt0, Pt2+ (PtO) and Pt4+ (PtO2) species on the surface of M-TiO2 and P-TiO2. The presence of mixed valence states of PtOx on the surface of the PtOx@M-TiO2 nanocomposite and defect states in M-TiO2 helps absorb visible light more efficiently compared to the PtOx@P-TiO2 …
Green Synthesis, Photocatalytic And Photoelectrochemical Performance Of Au-Graphene Nanocomposite, Mohammad Mansoob Khan Dr, Mohammad Ehtisham Khan, M. H. Cho
Green Synthesis, Photocatalytic And Photoelectrochemical Performance Of Au-Graphene Nanocomposite, Mohammad Mansoob Khan Dr, Mohammad Ehtisham Khan, M. H. Cho
Dr. Mohammad Mansoob Khan
A simplistic and environment friendly approach using electrochemically active biofilms (EABs) was developed for the synthesis of Au-Graphene (Au-G) nanocomposite without the use of surfactants or capping agents. The as-prepared Au-G nanocomposite was characterized by X-ray diffraction, diffuse reflectance spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, photoluminescence spectroscopy, and transmission electron microscopy. In this study, the anchoring of gold nanoparticles (AuNPs) on graphene sheets was achieved using an EAB. The EAB assists in the bio-reduction of Au3+ to Au0, and the AuNPs prevent the aggregation of graphene sheets and keep them apart because of the decrease in attractive forces between the …
Visible Light-Induced Enhanced Photoelectrochemical And Photocatalytic Studies Of Gold Decorated Sno2 Nanostructures, Mohammad Mansoob Khan Dr, S. A. Ansari, M. E. Khan, M. O. Ansari, B. K. Min, M. H. Cho
Visible Light-Induced Enhanced Photoelectrochemical And Photocatalytic Studies Of Gold Decorated Sno2 Nanostructures, Mohammad Mansoob Khan Dr, S. A. Ansari, M. E. Khan, M. O. Ansari, B. K. Min, M. H. Cho
Dr. Mohammad Mansoob Khan
This paper reports a novel one-pot biogenic synthesis of Au–SnO2 nanocomposite using electrochemically active biofilm. The synthesis, morphology and structure of the as-synthesized Au–SnO2 nanocomposite were in-depth studied and confirmed by UV-vis spectroscopy, photoluminescence spectroscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. It was observed that the SnO2 surface was decorated homogeneously with Au nanoparticles. The photoelectrochemical behavior of the Au–SnO2 nanocomposite was examined by cyclic voltammetry, differential pulse voltammetry, electrochemical impedance spectroscopy, and linear sweep voltammetry in the dark and under visible light irradiation. Visible light-induced photoelectrochemical studies confirmed that the Au–SnO2 nanocomposite had enhanced activities compared …