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Direct synthesis of organic salt-derived porous carbons for enhanced CO2 and methane storage (2023)
Journal Article
Alali, I., & Mokaya, R. (2023). Direct synthesis of organic salt-derived porous carbons for enhanced CO2 and methane storage. Journal of Materials Chemistry A, 11(13), 6952-6965. https://doi.org/10.1039/d3ta00044c

The direct carbonisation of a carbon-rich organic salt, potassium phthalimide (PPI), generates porous carbons with porosity suitable for energy-related gas storage applications. The PPI-derived carbons exhibit high surface area of up to 2889 m2 g−1 a... Read More about Direct synthesis of organic salt-derived porous carbons for enhanced CO2 and methane storage.

Electrochemical Sensor for Ascorbic Acid, Acetaminophen and Nitrite Based on Organoclay/Zr-MOF Film Modified Glassy Carbon Electrode (2022)
Journal Article
Ngwem, M. C. N., Kemmegne‐Mbouguen, J. C., Langmi, H. W., Musyoka, N. M., & Mokaya, R. (2022). Electrochemical Sensor for Ascorbic Acid, Acetaminophen and Nitrite Based on Organoclay/Zr-MOF Film Modified Glassy Carbon Electrode. ChemistrySelect, 7(40), Article e202202308. https://doi.org/10.1002/slct.202202308

A composite (Sa-HTDMA/UiO-66) consisting of organoclay (Sa-HTDMA) and a metal-organic framework (UiO-66) was prepared using organically modified natural Cameroonian clay and Zr-MOF. The organoclay was obtained by intercalating in its interlayer hexad... Read More about Electrochemical Sensor for Ascorbic Acid, Acetaminophen and Nitrite Based on Organoclay/Zr-MOF Film Modified Glassy Carbon Electrode.

Brute force determination of the optimum pore sizes for CO2 uptake in turbostratic carbons (2022)
Journal Article
Blankenship, L. S., Albeladi, N., Alkhaldi, T., Madkhali, A., & Mokaya, R. (2022). Brute force determination of the optimum pore sizes for CO2 uptake in turbostratic carbons. Energy Advances, 1(12), 1009-1020. https://doi.org/10.1039/d2ya00149g

Porosity, and in particular pore size is one of the most important considerations in the development of porous carbons for CO2 capture. Current methods for determining the optimum pore size for adsorption of gases either make very broad assumptions (... Read More about Brute force determination of the optimum pore sizes for CO2 uptake in turbostratic carbons.

Generalised predictability in the synthesis of biocarbons as clean energy materials: targeted high performance CO2 and CH4 storage (2022)
Journal Article
Alali, I., & Mokaya, R. (2022). Generalised predictability in the synthesis of biocarbons as clean energy materials: targeted high performance CO2 and CH4 storage. Energy and Environmental Science, 15(11), 4710-4724. https://doi.org/10.1039/d2ee02322a

This work shows how knowledge of any biomass and choice of carbonisation process can offer a generalised route to predictability in the preparation of activated biocarbons. We demonstrate that based on O/C ratio of carbonaceous matter, it is possible... Read More about Generalised predictability in the synthesis of biocarbons as clean energy materials: targeted high performance CO2 and CH4 storage.

Optimization of biodiesel synthesis from Jatropha curcas oil using kaolin derived zeolite Na-X as a catalyst (2022)
Journal Article
Otieno, S., Kengara, F., Kowenje, C., & Mokaya, R. (2022). Optimization of biodiesel synthesis from Jatropha curcas oil using kaolin derived zeolite Na-X as a catalyst. RSC Advances, 12(35), 22792-22805. https://doi.org/10.1039/d2ra03278c

Biodiesel is an alternative renewable green fuel obtainable from the reaction of plant or animal oil with a low molecular weight alcohol in the presence of a catalyst. However, the cost of its production remains high due to costly feedstock, the majo... Read More about Optimization of biodiesel synthesis from Jatropha curcas oil using kaolin derived zeolite Na-X as a catalyst.

Rational synthesis of microporous carbons for enhanced post-combustion CO2 capture via non-hydroxide activation of air carbonised biomass (2022)
Journal Article
Altwala, A., & Mokaya, R. (2022). Rational synthesis of microporous carbons for enhanced post-combustion CO2 capture via non-hydroxide activation of air carbonised biomass. RSC Advances, 12(31), 20080-20087. https://doi.org/10.1039/d2ra02661a

This work explores the use of a less corrosive activating agent, potassium oxalate (PO), in combination with difficult to activate carbonaceous matter for the preparation of activated carbons. The design of the study allowed a fuller understanding of... Read More about Rational synthesis of microporous carbons for enhanced post-combustion CO2 capture via non-hydroxide activation of air carbonised biomass.

Calcium coordination compounds of anionic forms of hydrogen dipicolinate and quinolinate: synthesis, characterization, crystal structures and DFT studies (2022)
Journal Article
Tella, A. C., Oladipo, A. C., Olayemi, V. T., Gordon, A., Ogunlaja, A. S., Alimi, L. O., …Walton, R. I. (2022). Calcium coordination compounds of anionic forms of hydrogen dipicolinate and quinolinate: synthesis, characterization, crystal structures and DFT studies. Structural Chemistry, https://doi.org/10.1007/s11224-022-01935-x

Two calcium coordination compounds [Ca(2,6-Hpdc)2(H2O)2] 1 and [Ca2(2,3-pdc)2(H2O)6]n2 (where 2,6-H2pdc = 2,6-pyridinedicarboxylic acid and 2,3-H2pdc = 2,3-pyridinedicarboxylic acid) were grown at room temperature. The compounds were characterized us... Read More about Calcium coordination compounds of anionic forms of hydrogen dipicolinate and quinolinate: synthesis, characterization, crystal structures and DFT studies.

Effect of kaolin pre-treatment method and NaOH levels on the structure and properties of kaolin-derived faujasite zeolites (2021)
Journal Article
Otieno, S., Kowenje, C., Kengara, F., & Mokaya, R. (2021). Effect of kaolin pre-treatment method and NaOH levels on the structure and properties of kaolin-derived faujasite zeolites. Materials Advances, 2(18), 5997-6010. https://doi.org/10.1039/d1ma00449b

Fusion with NaOH is considered effective in the conversion of kaolin to soluble aluminosilicates. However, to date, there is no consistency in the nature and type of zeolite structures prepared from kaolin via this approach, suggesting a lack of clar... Read More about Effect of kaolin pre-treatment method and NaOH levels on the structure and properties of kaolin-derived faujasite zeolites.

Co-pelletization of a zirconium-based metal-organic framework (UiO-66) with polymer nanofibers for improved useable capacity in hydrogen storage (2020)
Journal Article
Bambalaza, S. E., Langmi, H. W., Mokaya, R., Musyoka, N. M., & Khotseng, L. E. (2021). Co-pelletization of a zirconium-based metal-organic framework (UiO-66) with polymer nanofibers for improved useable capacity in hydrogen storage. International Journal of Hydrogen Energy, 46(12), 8607-8620. https://doi.org/10.1016/j.ijhydene.2020.12.049

We report on a concept of co-pelletization using mechanically robust hydroxylated UiO-66 to develop a metal-organic framework (MOF) monolith that contains 5 wt% electrospun polymer nanofibers, and consists of an architecture with alternating layers o... Read More about Co-pelletization of a zirconium-based metal-organic framework (UiO-66) with polymer nanofibers for improved useable capacity in hydrogen storage.

Porous carbons from sustainable sources and mild activation for targeted high-performance CO2 capture and storage (2020)
Journal Article
Aljumialy, A. M., & Mokaya, R. (2020). Porous carbons from sustainable sources and mild activation for targeted high-performance CO2 capture and storage. Materials Advances, 1(9), 3267-3280. https://doi.org/10.1039/d0ma00449a

Carbon activation typically involves corrosive activating reagents such as KOH and NaOH. In this report, a less corrosive activating agent, i.e., potassium oxalate (PO), was explored for the preparation of activated carbons from biomass (hydrochar fr... Read More about Porous carbons from sustainable sources and mild activation for targeted high-performance CO2 capture and storage.

Synthesis, characterization and density functional theory of copper (ii) complex and cobalt (ii) coordination polymer for detection of nitroaromatic explosives (2020)
Journal Article
Tellaa, A. C., Olayemiab, V. T., Adekolaa, F. A., Oladipoac, A. C., Adimulaa, V. O., Ogare, J. O., …Mokaya, R. (2021). Synthesis, characterization and density functional theory of copper (ii) complex and cobalt (ii) coordination polymer for detection of nitroaromatic explosives. Inorganica Chimica Acta, 515, Article 120048. https://doi.org/10.1016/j.ica.2020.120048

In recent years there has been a significant interest to design luminescent materials to detect explosives with a great degree of selectivity, sensitivity, and fast response time. Two new luminescent compounds, [Cu(Biphen)(Meim)(H2O)] 1 and [Co(BDC)(... Read More about Synthesis, characterization and density functional theory of copper (ii) complex and cobalt (ii) coordination polymer for detection of nitroaromatic explosives.