Herein, zinc-doped NiS thin films with acceptable lateral homogeneity and an energy bandgap betwe... more Herein, zinc-doped NiS thin films with acceptable lateral homogeneity and an energy bandgap between 2.25 and 2.50 eV have been constructed. Our findings indicated that doping is a useful method for modifying the composition and characteristics of NiS thin films.
Our findings revealed that the composition of the constituents, reaction conditions, and syntheti... more Our findings revealed that the composition of the constituents, reaction conditions, and synthetic processes all influence the characteristics and therefore the applications of the resulting biopolymer composites.
In this study, cobalt oxide (Co3O4), Mn-doped Co3O4 (MDCO), and Mn-doped Co3O4-functionalized car... more In this study, cobalt oxide (Co3O4), Mn-doped Co3O4 (MDCO), and Mn-doped Co3O4-functionalized carbon nanotube (MDCO-CNTs) were synthesized via the co-precipitation method using cobalt nitrate and manganese nitrate as a cobalt and manganese precursor, respectively. Synthesized materials were assessed using different characterization techniques like scanning electron microscopy, X-ray diffraction, and UV-visible spectroscopy. Congo red in an aqueous solution was adopted as the model dye to estimate the adsorption-assisted photocatalytic efficiency of the synthesized materials. The samples studied for adsorpsstion-assisted photocatalysis were found to be highly effective and among all the samples, the best removal performance (80%) was obtained by treating the MDCO-CNTs composite for 50 min at 50 °C. Mathematical modeling shows that all of the samples followed a pseudo-second-order kinetic model and data best fitted to a Langmuir isotherm, implying that the process involved in the remo...
By using the chemical bath deposition approach, binary bismuth sulphides (Bi2S3) and chromium-dop... more By using the chemical bath deposition approach, binary bismuth sulphides (Bi2S3) and chromium-doped ternary bismuth sulphides (Bi2−xCrxS3) thin films were effectively produced, and their potential for photovoltaic applications was examined. Structural elucidation revealed that Bi2S3 deposited by this simple and cost-effective method retained its orthorhombic crystal lattice by doping up to 3 at.%. The morphological analysis confirmed the crack-free deposition, hence making them suitable for solar cell applications. Optical analysis showed that deposited thin films have a bandgap in the range of 1.30 to 1.17 eV, values of refractive index (n) from 2.9 to 1.3, and an extinction coefficient (k) from 1.03 to 0.3. From the Hall measurements, it followed that the dominant carriers in all doped and undoped samples are electrons, and the carrier density in doped samples is almost two orders of magnitude larger than in Bi2S3. Hence, this suggests that doping is an effective tool to improve t...
Electrochemical advanced oxidation practices (EAOPs), remarkably, electro-peroxone (EP), photoele... more Electrochemical advanced oxidation practices (EAOPs), remarkably, electro-peroxone (EP), photoelectro-peroxone (PEP), and complementary hybrid EP approaches, are emerging technologies on accountability of complete disintegration and elimination of wide spectrum of model pollutants predominantly biodegradable, recalcitrant, and persistent organic pollutants by engendering powerful oxidants in wastewater. A concise mechanism of EP and PEP approaches along with their contribution to free radical formation are scrutinized. Furthermore, this chapter provides a brief review of EP, PEP, and complementary hybrid EP-based EAOPs that have pragmatically treated laboratory-scale low- and high-concentrated distillery biodigester effluent, refractory pharmaceutical, textile, herbicides, micropollutant, organic pollutant, acidic solution, landfill leachates, municipal secondary effluents, hospital, and industries-based wastewater. Afterward, discussion has further extended to quantitatively evalua...
For photovoltaic applications, undoped and Ni2+ doped Bi2S3 thin films were chemically deposited ... more For photovoltaic applications, undoped and Ni2+ doped Bi2S3 thin films were chemically deposited onto glass substrates at room temperature. Elemental diffraction analysis confirmed the successful Ni2+ incorporation in the range of 1.0 to 2.0 at. %, while X-ray Diffraction analysis revealed that orthorhombic crystal lattice of Bi2S3 was conserved while transferring from binary to ternary phase. Scanning electron microscopy images reported homogeneous and crack-free morphology of the obtained films. Optoelectronic analysis revealed that the bandgap value was shifted from 1.7 to 1.1 eV. Ni2+ incorporation also improved the carrier concentration, leading to higher electrical conductivity. Resultant optoelectronic behavior of ternary Bi2−x NixS3 thin films suggests that doping is proved to be an effectual tool to optimize the photovoltaic response of Bi2S3 for solar cell applications.
Mixed matrix membranes (MMMs) of polymer of intrinsic microporosity (PIM-1) is synthesized by inc... more Mixed matrix membranes (MMMs) of polymer of intrinsic microporosity (PIM-1) is synthesized by incorporating modified zeolite (MZ) as the filler. Zeolite was treated with (3-Aminopropyl)-triethoxysilane (APTES). This treatment provided terminal amino groups to the zeolite by interaction between zeolite and ethoxy group of silane. MZ was systematically incorporated from 5 wt% to 15 wt% for evaluation of the improvement in gas separation behaviour. Physical characteristics and elemental analysis of MMMs were evaluated by X-ray photoelectron spectroscopy (XPS), X-ray diffraction analysis (XRD) and Fourier transform infrared (FTIR) spectroscopy. FTIR spectrum indicated physical interaction between PIM-1 and MZ. Scanning electron microscopy analysis (SEM) revealed the smooth surface morphology for PIM-1 membrane. Aggregates of MZ were observed from SEM analysis of PIM-1/MZ MMMs which indicated the formation of additional void volume. The Brunauer, Emmett, Teller (BET) analysis exhibited t...
Research & Reviews: Journal of Botanical Sciences, 2020
Rising population has globally challenged the food security for all livings, which ultimately nee... more Rising population has globally challenged the food security for all livings, which ultimately need the agricultural land expansion to meet the demands. For cultivations, along with other parameters, optimal availability of most of the nutrients is found at pH less than 6. And alkaline soils covering more than one fourth of the earth's surface constrain the wide range of available land for cultivations. Amendments in pH are usually brought out by the addition of either synthetic chemicals or natural biomass but, effectiveness of any amendment is directly resisted by soil’s buffering capacity. Buffering capacity retains the pH of the soil. This study is designed to lower the soil pH as well as to maintain it efficiently, over a long period of time by using various chemicals. Chemicals tried to reduce the soil pH in this study were: aluminum sulphate (Al2(SO4)3), hydrogen peroxide (H2O2), hydrochloric acid (HCl) and sulphuric acid (H2SO4). The chemicals were employed on three diffe...
Journal of Materials Science: Materials in Electronics, 2021
Binary bismuth sulfide (Bi 2 S 3 ) and ternary aluminum-doped bismuth sulfide (Al@Bi 2 S 3 ) thin... more Binary bismuth sulfide (Bi 2 S 3 ) and ternary aluminum-doped bismuth sulfide (Al@Bi 2 S 3 ) thin films were prepared by the chemical bath deposition method for photovoltaic applications. The newly designed materials synthesized at room temperature were thoroughly analyzed by several characterization techniques i.e., X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, optical absorption, thickness measurement, and Hall effect techniques. Correlation between structural, morphological, optical, electrical, and transport properties was evaluated. The parent material i.e., Bi 2 S 3 is reported to have an orthorhombic phase, while doped derivatives revealed the amorphous phase. Optical band gaps in the range of 1.6–1.3 eV and absorption coefficients were found in the range of 10 4 to 10 6 cm −1 . The thickness of the films changed with the change in the composition of the solution matrix and the films were well adhered, compact, and crack free. Hall measurements show that the dominant carriers in all studied compounds were electrons and that the carrier density for ternary films is almost two orders of magnitude greater than binary Bi 2 S 3 . The disorderliness in these newly designed materials is traced through the estimation of the change in the Urbach energy.
Silicone oxycarbide (SiOC) is gaining attention as a potential anode material for lithium-ion bat... more Silicone oxycarbide (SiOC) is gaining attention as a potential anode material for lithium-ion batteries due to its higher reversible capacity and high-rate capability.
Herein, zinc-doped NiS thin films with acceptable lateral homogeneity and an energy bandgap betwe... more Herein, zinc-doped NiS thin films with acceptable lateral homogeneity and an energy bandgap between 2.25 and 2.50 eV have been constructed. Our findings indicated that doping is a useful method for modifying the composition and characteristics of NiS thin films.
Our findings revealed that the composition of the constituents, reaction conditions, and syntheti... more Our findings revealed that the composition of the constituents, reaction conditions, and synthetic processes all influence the characteristics and therefore the applications of the resulting biopolymer composites.
In this study, cobalt oxide (Co3O4), Mn-doped Co3O4 (MDCO), and Mn-doped Co3O4-functionalized car... more In this study, cobalt oxide (Co3O4), Mn-doped Co3O4 (MDCO), and Mn-doped Co3O4-functionalized carbon nanotube (MDCO-CNTs) were synthesized via the co-precipitation method using cobalt nitrate and manganese nitrate as a cobalt and manganese precursor, respectively. Synthesized materials were assessed using different characterization techniques like scanning electron microscopy, X-ray diffraction, and UV-visible spectroscopy. Congo red in an aqueous solution was adopted as the model dye to estimate the adsorption-assisted photocatalytic efficiency of the synthesized materials. The samples studied for adsorpsstion-assisted photocatalysis were found to be highly effective and among all the samples, the best removal performance (80%) was obtained by treating the MDCO-CNTs composite for 50 min at 50 °C. Mathematical modeling shows that all of the samples followed a pseudo-second-order kinetic model and data best fitted to a Langmuir isotherm, implying that the process involved in the remo...
By using the chemical bath deposition approach, binary bismuth sulphides (Bi2S3) and chromium-dop... more By using the chemical bath deposition approach, binary bismuth sulphides (Bi2S3) and chromium-doped ternary bismuth sulphides (Bi2−xCrxS3) thin films were effectively produced, and their potential for photovoltaic applications was examined. Structural elucidation revealed that Bi2S3 deposited by this simple and cost-effective method retained its orthorhombic crystal lattice by doping up to 3 at.%. The morphological analysis confirmed the crack-free deposition, hence making them suitable for solar cell applications. Optical analysis showed that deposited thin films have a bandgap in the range of 1.30 to 1.17 eV, values of refractive index (n) from 2.9 to 1.3, and an extinction coefficient (k) from 1.03 to 0.3. From the Hall measurements, it followed that the dominant carriers in all doped and undoped samples are electrons, and the carrier density in doped samples is almost two orders of magnitude larger than in Bi2S3. Hence, this suggests that doping is an effective tool to improve t...
Electrochemical advanced oxidation practices (EAOPs), remarkably, electro-peroxone (EP), photoele... more Electrochemical advanced oxidation practices (EAOPs), remarkably, electro-peroxone (EP), photoelectro-peroxone (PEP), and complementary hybrid EP approaches, are emerging technologies on accountability of complete disintegration and elimination of wide spectrum of model pollutants predominantly biodegradable, recalcitrant, and persistent organic pollutants by engendering powerful oxidants in wastewater. A concise mechanism of EP and PEP approaches along with their contribution to free radical formation are scrutinized. Furthermore, this chapter provides a brief review of EP, PEP, and complementary hybrid EP-based EAOPs that have pragmatically treated laboratory-scale low- and high-concentrated distillery biodigester effluent, refractory pharmaceutical, textile, herbicides, micropollutant, organic pollutant, acidic solution, landfill leachates, municipal secondary effluents, hospital, and industries-based wastewater. Afterward, discussion has further extended to quantitatively evalua...
For photovoltaic applications, undoped and Ni2+ doped Bi2S3 thin films were chemically deposited ... more For photovoltaic applications, undoped and Ni2+ doped Bi2S3 thin films were chemically deposited onto glass substrates at room temperature. Elemental diffraction analysis confirmed the successful Ni2+ incorporation in the range of 1.0 to 2.0 at. %, while X-ray Diffraction analysis revealed that orthorhombic crystal lattice of Bi2S3 was conserved while transferring from binary to ternary phase. Scanning electron microscopy images reported homogeneous and crack-free morphology of the obtained films. Optoelectronic analysis revealed that the bandgap value was shifted from 1.7 to 1.1 eV. Ni2+ incorporation also improved the carrier concentration, leading to higher electrical conductivity. Resultant optoelectronic behavior of ternary Bi2−x NixS3 thin films suggests that doping is proved to be an effectual tool to optimize the photovoltaic response of Bi2S3 for solar cell applications.
Mixed matrix membranes (MMMs) of polymer of intrinsic microporosity (PIM-1) is synthesized by inc... more Mixed matrix membranes (MMMs) of polymer of intrinsic microporosity (PIM-1) is synthesized by incorporating modified zeolite (MZ) as the filler. Zeolite was treated with (3-Aminopropyl)-triethoxysilane (APTES). This treatment provided terminal amino groups to the zeolite by interaction between zeolite and ethoxy group of silane. MZ was systematically incorporated from 5 wt% to 15 wt% for evaluation of the improvement in gas separation behaviour. Physical characteristics and elemental analysis of MMMs were evaluated by X-ray photoelectron spectroscopy (XPS), X-ray diffraction analysis (XRD) and Fourier transform infrared (FTIR) spectroscopy. FTIR spectrum indicated physical interaction between PIM-1 and MZ. Scanning electron microscopy analysis (SEM) revealed the smooth surface morphology for PIM-1 membrane. Aggregates of MZ were observed from SEM analysis of PIM-1/MZ MMMs which indicated the formation of additional void volume. The Brunauer, Emmett, Teller (BET) analysis exhibited t...
Research & Reviews: Journal of Botanical Sciences, 2020
Rising population has globally challenged the food security for all livings, which ultimately nee... more Rising population has globally challenged the food security for all livings, which ultimately need the agricultural land expansion to meet the demands. For cultivations, along with other parameters, optimal availability of most of the nutrients is found at pH less than 6. And alkaline soils covering more than one fourth of the earth's surface constrain the wide range of available land for cultivations. Amendments in pH are usually brought out by the addition of either synthetic chemicals or natural biomass but, effectiveness of any amendment is directly resisted by soil’s buffering capacity. Buffering capacity retains the pH of the soil. This study is designed to lower the soil pH as well as to maintain it efficiently, over a long period of time by using various chemicals. Chemicals tried to reduce the soil pH in this study were: aluminum sulphate (Al2(SO4)3), hydrogen peroxide (H2O2), hydrochloric acid (HCl) and sulphuric acid (H2SO4). The chemicals were employed on three diffe...
Journal of Materials Science: Materials in Electronics, 2021
Binary bismuth sulfide (Bi 2 S 3 ) and ternary aluminum-doped bismuth sulfide (Al@Bi 2 S 3 ) thin... more Binary bismuth sulfide (Bi 2 S 3 ) and ternary aluminum-doped bismuth sulfide (Al@Bi 2 S 3 ) thin films were prepared by the chemical bath deposition method for photovoltaic applications. The newly designed materials synthesized at room temperature were thoroughly analyzed by several characterization techniques i.e., X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, optical absorption, thickness measurement, and Hall effect techniques. Correlation between structural, morphological, optical, electrical, and transport properties was evaluated. The parent material i.e., Bi 2 S 3 is reported to have an orthorhombic phase, while doped derivatives revealed the amorphous phase. Optical band gaps in the range of 1.6–1.3 eV and absorption coefficients were found in the range of 10 4 to 10 6 cm −1 . The thickness of the films changed with the change in the composition of the solution matrix and the films were well adhered, compact, and crack free. Hall measurements show that the dominant carriers in all studied compounds were electrons and that the carrier density for ternary films is almost two orders of magnitude greater than binary Bi 2 S 3 . The disorderliness in these newly designed materials is traced through the estimation of the change in the Urbach energy.
Silicone oxycarbide (SiOC) is gaining attention as a potential anode material for lithium-ion bat... more Silicone oxycarbide (SiOC) is gaining attention as a potential anode material for lithium-ion batteries due to its higher reversible capacity and high-rate capability.
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Papers by Tanzeela Fazal