Search results for: Kenneth J. Balkus

Items from 1 to 20 out of 88 results

article

Liquid phase propylene oxidation with tert-butyl hydroperoxide over titanium containing wrinkled mesoporous silica

Zijie Wang, Kenneth J. Balkus

Catalysis Communications > 2017 > 96 > C > 15-18

Titanium containing wrinkled mesoporous silica (Ti-WMS) was prepared by direct synthesis and showed unique conical pores with wrinkled pore walls. The pores of this type of titanosilicate radiate from the center of each particle to the surface of the sphere with gradually increased pore size. These catalysts showed superior performance over traditional Ti-MCM-41 for liquid phase propylene oxidation...

article

Synthesis of wrinkled mesoporous carbon

Zijie Wang, Kenneth J. Balkus

Materials Letters > 2017 > 195 > C > 139-142

Wrinkled mesoporous silica was used as a template for the synthesis of carbon with the same morphology and pore structure. The resulting wrinkled mesoporous carbon not only maintains the unique conical pore structure radiating from the core to the outside surface but also exhibits an increased surface area relative to silica. The high surface area (1344m²/g) and highly accessible voids make the wrinkled...

article

Amine-functionalized (Al) MIL-53/VTEC™ mixed-matrix membranes for H2/CO2 mixture separations at high pressure and high temperature

Edson V. Perez, Grace J.D. Kalaw, John P. Ferraris, Kenneth J. Balkus, more

Journal of Membrane Science > 2017 > 530 > C > 201-212

VTEC™ PI-1388 and 20wt% (Al) NH₂-MIL-53/VTEC™ PI-1388 mixed-matrix membranes (MMMs) with different thicknesses were tested for gas permeation of H₂ and CO₂ from 5 to 30bar and from 35 to 300°C. 50/50 H₂/CO₂ mixtures were also tested at 30bar and 250°C with stage cuts that ranged from 0.05 to 1. Gas permeation data show that the affinity of (Al) NH₂-MIL-53 for VTEC™ PI-1388 is strong enough to perform...

article

Synthesis and modification of titanium containing wrinkled mesoporous silica for cyclohexene epoxidation

Zijie Wang, Kenneth J. Balkus

Microporous and Mesoporous Materials > 2017 > 243 > C > 76-84

Ti containing wrinkled mesoporous silica (Ti-WMS) has been prepared by direct synthesis with various Si/Ti ratios. Under similar conditions, Ti containing periodic mesoporous organosilicas (Ti-PMO) has been prepared with benzene bridges in the framework while maintaining the wrinkled structure. Both Ti-WMS and Ti-PMO samples have the radial wrinkled structure, and were further modified by trimethylsilylation...

article

Wrinkled mesoporous carbon supported Pd nanoparticles for hydrogenation and aerobic oxidation reactions

Zijie Wang, Kenneth J. Balkus

Journal of Porous Materials > 2018 > 25 > 1 > 15-21

Wrinkled mesoporous silica (WMS) was employed as a hard template to synthesize a carbon replica. The resulting carbon materials, wrinkled mesoporous carbon (WMC), retained the main structural features from the WMS, which has conical pores that radiate from the center of the spherical particle to the outer surface in all directions resulting in wrinkled shaped pore walls. This WMC material was used...

article

Oxidative Dehydrogenation of Cyclohexane and Cyclohexene over Y-doped CeO₂ Nanorods

Zijie Wang, Yuzhi Gao, Yves J. Chabal, Kenneth J. Balkus

Catalysis Letters > 2017 > 147 > 3 > 738-744

The Y-doped and pure CeO₂ nanorods were tested as dehydrogenation catalysts in the oxidative dehydrogenation of cyclohexene and cyclohexane. The dehydrogenation process involves a redox process and the increased amount of oxygen vacancies improved the catalytic activity. At a temperature as low as 150 °C, compared to the temperature of ~600 °C required for vanadium catalysts, the Y-doped CeO₂ nanorods...

article

Radiotherapeutic bandage for the treatment of squamous cell carcinoma of the skin

Bhuvaneswari Koneru, Yi Shi, Imalka Munaweera, Mary Wight-Carter, more

Nuclear Medicine and Biology > 2016 > 43 > 6 > 333-338

Squamous cell carcinoma (SCC) is the second most common form of skin cancer in the United States. The efficacy of a pharmaceutically elegant radiotherapeutic bandage, previously described by us for application against SCC of the skin, was tested for the first time in vivo using a subcutaneous SCC mouse model and a therapeutically relevant radiation dose.Female athymic nude mice were injected with...

article

Encapsulation of red sulfur chromophores in a zeolitic imidazolate framework (ZIF-8) via solvent assisted linker exchange

Sajani A. Basnayake, Kui Tan, Mark Leonard, Yves Chabal, more

Microporous and Mesoporous Materials > 2016 > 219 > C > 172-177

Red color sulfur chromophores were entrapped inside the cages of zeolitic imidazolate framework ZIF-8 in order to prepare a ZIF analog of ultramarine red. ZIF-8 is made from Zn²⁺ and 2-methylimidazole linker and has sodalite topology. SIM-1, a ZIF isostructural to ZIF-8 that is made from Zn²⁺ and an imidazole linker containing a carboxaldehyde group was used as the starting material for the red pigment...

article

Nitric oxide- and cisplatin-releasing silica nanoparticles for use against non-small cell lung cancer

Imalka Munaweera, Yi Shi, Bhuvaneswari Koneru, Amit Patel, more

Journal of Inorganic Biochemistry > 2015 > 153 > C > 23-31

Nitric oxide (NO) and cisplatin releasing wrinkle-structured amine-modified mesoporous silica (AMS) nanoparticles have been developed for the treatment of non-small cell lung cancer (NSCLC). The AMS and NO- and cisplatin-loaded AMS materials were characterized using TEM, BET surface area, FTIR and ICP–MS, and tested in cell culture. The results show that for NSCLC cell lines (i.e., H596 and A549),...

article

Fabrication of a Substituted Imidazolate Material 1 (SIM-1) membrane using post synthetic modification (PSM) for pervaporation of water/ethanol mixtures

Anne M. Marti, Daniel Tran, Kenneth J. Balkus

Journal of Porous Materials > 2015 > 22 > 5 > 1275-1284

Post synthetic modification (PSM) of metal organic frameworks (MOFs) is a useful tactic used amongst researchers to refine a MOF’s properties for an application of interest. In this report, we post synthetically modified a MOF known as Substituted Imidazolate Material 1 (SIM-1) to refine its molecular sieving potential. PSM of ethylenediamine, EDA, vapor was applied to a SIM-1 wafer. EDA cross-linked...

article

Novel wrinkled periodic mesoporous organosilica nanoparticles for hydrophobic anticancer drug delivery

Imalka Munaweera, Jessica Hong, Alicia D’Souza, Kenneth J. Balkus

Journal of Porous Materials > 2015 > 22 > 1 > 1-10

Novel wrinkled structured periodic mesoporous organosilica (PMO) nanoparticles have been developed for the hydrophobic anticancer drug delivery. The PMO materials were characterized by TEM, Raman, TGA, zetapotential and PXRD. These novel wrinkled PMOs have tunable surface area, hydrophobicity and pore sizes which are suitable for hydrophobic drug delivery. The hydrophobic anticancer drug paclitaxel...

article

Composite membranes with a highly selective polymer skin for hydrogen separation

Sumudu N. Wijenayake, Nimanka P. Panapitiya, Cindy N. Nguyen, Yu Huang, more

Separation and Purification Technology > 2014 > 135 > C > 190-198

This study reports the fabrication of a highly hydrogen selective cross-linked polymer skin on a highly permeable mixed matrix membrane. Selective polymer skins were prepared by spin coating a thin layer of 6FDA-durene polymer onto ZIF-8/6FDA-durene mixed matrix membranes followed by subsequent cross-linking of the 6FDA-durene layer with ethylene diamine (EDA) vapor. Resultant membrane yielded significantly...

article

MIL-53 frameworks in mixed-matrix membranes

Josephine O. Hsieh, Kenneth J. Balkus, John P. Ferraris, Inga H. Musselman

Microporous and Mesoporous Materials > 2014 > 196 > Complete > 165-174

The MIL-53 metal–organic framework (MOF) is known to change reversibly from an open-pore framework (MIL-53-ht) to a closed-pore framework (MIL-53-lt) depending on the temperature, pressure, or guest molecules absorbed. Three frameworks of the additive, MIL-53-as synthesized (MIL-53-as), MIL-53-ht, and MIL-53-lt, were prepared, characterized, and combined with Matrimid® to form mixed-matrix membranes...

article

Metal-organic polyhedra 18 mixed-matrix membranes for gas separation

Edson V. Perez, Kenneth J. Balkus, John P. Ferraris, Inga H. Musselman

Journal of Membrane Science > 2014 > 463 > Complete > 82-93

Crystals of highly soluble metal-organic polyhedra 18 (MOP-18) were synthesized and used as additives in Matrimid ^® 5218 to form mixed-matrix membranes. The MOP-18 linker was functionalized with long alkyl chains to help the crystals dissolve in common organic solvents. Scanning electron microscopy images revealed that the MOP-18 molecules do not aggregate into large particles even at loadings...

article

Coated melt-spun acrylonitrile-based suture for delayed release of nitric oxide

Alysia Lowe, Wenjin Deng, Dennis W. Smith, Kenneth J. Balkus

Materials Letters > 2014 > 125 > Complete > 221-223

Nitric oxide (NO) plays an important role in physiological functions in the body, naturally synthesized by nitric oxide synthase. NO has been shown to enhance wound healing, generating research interest in the incorporation of NO into thromboresistant polymers for medical devices. Such polymers can be processed by melt-spinning to create surgical suture type materials. These melt-spun sutures can...

article

Stabilization of immiscible polymer blends using structure directing metal organic frameworks (MOFs)

Nimanka P. Panapitiya, Sumudu N. Wijenayake, Yu Huang, David Bushdiecker, more

Polymer > 2014 > 55 > 8 > 2028-2034

We have developed a novel approach for compatibilizing immiscible polymer blends using metal organic frameworks (MOFs). For the first time we demonstrated that the droplet diameter of the dispersed phase in a 1:1 immiscible polymer blend composed of 6FDA-DAM:DABA [copolymer of 4,4-hexafluoroisopropylidene diphthalic anhydride (6FDA), 2,4,6-trimethyl-1,3-phenylenediamine and 3,5-diaminobenzoic acid...

article

Tuning the crystal size and morphology of the substituted imidazole material, SIM-1

Anne M. Marti, Mylinh Van, Kenneth J. Balkus

Journal of Porous Materials > 2014 > 21 > 6 > 889-902

Zeolitic imidazolate frameworks (ZIFs) are attractive materials for liquid and gas separations. They are chemically and thermally stable and their pores sizes/pore windows can be modified for enhanced performance. Substituted imidazolate material-1 (SIM-1) is a ZIF that crystallizes in the SOD and RHO topologies. Herein, we report a variety of new syntheses for SIM-1 in the SOD and RHO topologies...

article

Storage and delivery of nitric oxide via diazeniumdiolated metal organic framework

Alysia Lowe, Punya Chittajallu, Qihan Gong, Jing Li, more

Microporous and Mesoporous Materials > 2013 > 181 > Complete > 17-22

Metal–organic frameworks (MOFs) are generally explored for gas adsorption and separation but more recently they have been studied for use in biomedical applications. The present study focuses on the incorporation of a nitric oxide (NO) donor, called a diazeniumdiolate (NONOate), into a new MOF using a one-step post-synthetic method. The MOF, Cu-TDPAT, contains copper nodes linked by 2,4,6-tris(3,5-dicarboxylphenylamino)-1,3,5-triazine...

article

Manganese oxide nanorod–graphene/vanadium oxide nanowire–graphene binder-free paper electrodes for metal oxide hybrid supercapacitors

Sanjaya D. Perera, Mark Rudolph, Ruperto G. Mariano, Nour Nijem, more

Nano Energy > 2013 > 2 > 5 > 966-975

In this study MnO ₂ nanorodes (MNR) were fabricated on reduced graphene oxide (rGO) sheets using a facile hydrothermal synthesis route. As prepared binder free MNR-rGO electrodes exhibited promising electrochemical performance. A similar approach was employed to prepare V ₂ O ₅ nanowire (VNW) on rGO electrodes as anodes for supercapacitor applications. The VNW-rGO anode and...

article

Selective detection of olefins using a luminescent silver-functionalized metal organic framework, RPM3

Anne M. Marti, Nour Nijem, Yves J. Chabal, Kenneth J. Balkus

Microporous and Mesoporous Materials > 2013 > 174 > Complete > 100-107

A highly flexible, luminescent, three-dimensional metal organic framework (MOF), [Zn ₂ (bpdc) ₂ (bpee)]·2DMF (bpdc=4,4′-biphenyldicarboxylate; bpee=1,2-bipyridylethylene) also known as RPM3 was post functionalized with AgNO ₃ forming a π complex with the MOF’s conjugated linkers. The Ag ⁺ functionalized MOF in its activated form exhibits structural rearrangements from...

Publication date

Set your own date range

INFONA - science communication portal

Search results for: Kenneth J. Balkus

Liquid phase propylene oxidation with tert-butyl hydroperoxide over titanium containing wrinkled mesoporous silica

Synthesis of wrinkled mesoporous carbon

Amine-functionalized (Al) MIL-53/VTEC™ mixed-matrix membranes for H2/CO2 mixture separations at high pressure and high temperature

Synthesis and modification of titanium containing wrinkled mesoporous silica for cyclohexene epoxidation

Wrinkled mesoporous carbon supported Pd nanoparticles for hydrogenation and aerobic oxidation reactions

Oxidative Dehydrogenation of Cyclohexane and Cyclohexene over Y-doped CeO₂ Nanorods

Radiotherapeutic bandage for the treatment of squamous cell carcinoma of the skin

Encapsulation of red sulfur chromophores in a zeolitic imidazolate framework (ZIF-8) via solvent assisted linker exchange

Nitric oxide- and cisplatin-releasing silica nanoparticles for use against non-small cell lung cancer

Fabrication of a Substituted Imidazolate Material 1 (SIM-1) membrane using post synthetic modification (PSM) for pervaporation of water/ethanol mixtures

Novel wrinkled periodic mesoporous organosilica nanoparticles for hydrophobic anticancer drug delivery

Composite membranes with a highly selective polymer skin for hydrogen separation

MIL-53 frameworks in mixed-matrix membranes

Metal-organic polyhedra 18 mixed-matrix membranes for gas separation

Coated melt-spun acrylonitrile-based suture for delayed release of nitric oxide

Stabilization of immiscible polymer blends using structure directing metal organic frameworks (MOFs)

Tuning the crystal size and morphology of the substituted imidazole material, SIM-1

Storage and delivery of nitric oxide via diazeniumdiolated metal organic framework

Manganese oxide nanorod–graphene/vanadium oxide nanowire–graphene binder-free paper electrodes for metal oxide hybrid supercapacitors

Selective detection of olefins using a luminescent silver-functionalized metal organic framework, RPM3

Filter options

Publication date

Content availability

Keywords

Data set

Journal

INFONA - science communication portal

Search results for: Kenneth J. Balkus

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Content availability

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options