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Browsing by Author "Munguti, Lawrence K."

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Characterization-of SnxSey/Zno:Sn p-n junction for solar cell applications

Munguti, Lawrence K. (2016-07-15)

In this study, tin selenide was prepared at different ratios using tin and selenium pellets in glass tube filled with argon and then heated up to 350°C, also, tin doped zinc oxide was prepared using tin pellets and zinc ...
Effect of surface passivation on electrical properties of Pd-F:SnO2 thin films prepared by Spray Pyrolysis technique

Munguti, Lawrence K.; Mwathe, Patrick; Musembi, Robinson; Munji, Mathew; Odari, Victor; Ntilakigwa, Alex; Nguu, John; Muthoka, Boniface (MDPI, 2014)

Pd-F:SnO2 thin films have been prepared by spray pyrolysis technique. Optimization has been done by doping SnO2 with palladium at varying levels of concentration and then recording sheet resistance. The sheet resistivity ...
Effects of Zn:Ti molar ratios on the morphological, optical and photocatalytic properties of ZnO-TiO2 nanocomposites for application in dye removal

Munguti, Lawrence K.; Dejene, Francis (Elsevier, 2021-06)

ZnO-TiO2 nanostructured composites have been synthesized via the facile sol-gel route in varying molar-based sol ratios of Zn:Ti (v/v). The composites were characterized for the structural properties by X-ray diffraction ...
Influence of annealing temperature on structural, optical and photocatalytic properties of ZnO–TiO2 composites for application in dye removal in water

Munguti, Lawrence K.; Dejene, Francis (Elsevier, 2020-10)

Optimized ratios Zn:Ti (1:1) of ZnO–TiO2 nanocomposites synthesized via the sol–gel method were annealed at; 500 °C, 600 °C, 700 °C, 800 °C and 900 °C. The structural, morphological thermal, optical and chemical changes ...
Influence of deposition atmosphere on the structural and photoluminescence properties of pulsed laser deposited (Y–Gd)3Al5O12:Ce3+ thin films

Korir, P. C.; Dejene, F. B.; Chenene, M. L.; Munguti, Lawrence K. (Elsevier, 2020-03-01)

Thin films of (Y–Gd)3Al5O12: Ce3+ phosphor were fabricated on Si (100) substrates by pulsed laser deposition (PLD) method using Nd:YAG laser of 266 nm, 10 Hz and 8 ns pulse width. The films were deposited under vacuum, ...
Influence of surface passivation on optical properties of spray pyrolysis deposited Pd-F:SnO2

Munguti, Lawrence K.; Mwathe, Patrick M.; Musembi, Robinson; Munji, Mathew; Odari, Benjamin; Ntilakigwa, Alex A.; Nguu, John; Aduda, Bernard; Muthoka, Boniface (Science Publishing Group, 2014)

Pd-F:SnO2 thin films have been prepared by spray pyrolysis technique using an alcoholic precursor solution consisting of stannic chloride (SnCl4.5H20), ammonium fluoride (NH4F) and palladium chloride (PdCl2). Optimization ...
Optimization of Sn. Se, Deposited by Reactive Thermal Evaporation for Solar cell Application

Munguti, Lawrence K.; Njoroge, W. K.; Musembi, R. J. (2016-07-15)

In this study, tin selenide was prepared at different ratios using tin and selenium pellets in glass tube filled with argon and then heated up to 350'C. The resulting materials were cut Into ingots which were used in ...
Sol pH-induced zinc–titanium mixed-oxide multi-phase composite and its photocatalytic properties

Munguti, Lawrence K.; Dejene, Francis B. (Elsevier, 2021-07)

ZnO-TiO2 nanocomposites were synthesized via sol–gel technique in varying sol pH and the effects of pH on the composites’ properties studied. The variation of crystallinity with pH was determined using the X-ray diffraction ...
Surface passivation effect on CO2 sensitivity of spray pyrolysis deposited Pd-F: SnO2 thin film gas sensor

Munguti, Lawrence K.; Mwathe, Patrick M.; Musembi, Robinson; Munji, Mathew; Odari, Benjamin; Ntilakigwa, Alex A.; Mwabora, Julius; Njoroge, Walter; Aduda, Bernard; Muthoka, Boniface (Science Publishing Group, 2014)

Different thin films samples made of SnO2, F:SnO2, Pd: SnO2 and and co-doped Pd-F: SnO2 were deposited at a substrate temperature of 450oC using optimized doping concentrations of F and Pd, thereafter the samples were ...
Zeolite Na-A supported TiO2: Effects of TiO2 loading on structural, optical and adsorption properties

Munguti, Lawrence K.; Dejene, Francis B.; Muthee, Dorah K. (Elsevier, 2023-03)

Zeolite Na-A supported TiO2 nanopowders were synthesized via a modified sol–gel technique and the effects of TiO2 loading were characterized for thermal, structural, morphological, optical and textural behaviour. Thermal ...
ZnO:Sn deposition by reactive evaporation: Effects of Sn doping on the electrical and optical properties

Munguti, Lawrence K.; Njoroge, W. K.; Musembi, R. J. (2014-08)

Tin doped zinc oxide thin films were deposited by reactive evaporation under various tin doping levels ranging from 1% to 8%. The deposition was done using Edwards Auto 306 coating unit at room temperature (25°C) and 5.0 ...

Browsing by Author "Munguti, Lawrence K."

Browsing by Author "Munguti, Lawrence K."

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