IIT Madras Researchers find high levels of pharmaceutical contaminants in the River Cauvery

CHENNAI, 7th October 2021: Indian Institute of Technology Madras Researchers have found that the waters of River Cauvery are polluted by a range of emerging contaminants that include pharmaceutically-active compounds, personal care products, plastics, flame retardants, heavy metals, and pesticides, among many others.

Of these, pharmaceutical contamination is particularly serious in India, which is the second-largest pharmaceutical manufacturing country in the world. These drug compounds, when released even in minuscule amounts into water bodies, can harm human beings and the ecosystem in the long run.

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Hetero – atom induced ferromagnetism in antiferromagnetic hematite

Hetero - atom induced ferromagnetism in antiferromagnetic hematite

Categories for this Invention

Transition metals,

metal oxides

Targeted Industries

Watermarking IP design,

Electronic circuits

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Applications

The synthesized α-Fe2O3 has potential application in nanomagnetic devices, nanobiosensors, batteries, magnetic field controlled ion separation, giant magnetoresistance devices, and magnetic field controlled photocatalytic reactors and biomedical applications.

Problem Addressed

α- Fe2O3 possess various interesting properties like wide band gap, absorption in visible region, fluorescence, corrosion resistant, biocompatibility, low cost which makes it suitable candidate for technological applications. However, due to its antiferromagnetic nature magnetic field assisted potential applications are limited. Hence enhancing the magnetic properties of antiferromagnetic α- Fe2O3 can foster vast applications in the field of magnetism.

Abstract

The present invention relates to a single step method for synthesizing ferromagnetic hematite iron oxide(α- Fe2O3) by combustion or pyrolysis. The combustion synthesis of α- Fe2O3 includes heating a composite admixture including at least one iron precursor and at least one heteroatom precursor in a predetermined weight ratio to a predetermined temperature range under an inert gas atmosphere.Further, the admixture is subsequently exposed to atmospheric air. The pyrolytic synthesis of α- Fe2O3 includes heating a composite admixture including at least one iron precursor and at least one heteroatom precursor in a predetermined weight ratio to a predetermined temperature range under an air atmosphere. The method includes inducing ferromagnetism by inclusion of heteroatoms probably in the sites of crystal defect of α- Fe2O3. The method results in a large yield of magnetic α-Fe2O3 having high magnetization. The synthesized α-Fe2O3 may be used in nanobiosensors, batteries or giant magnetoresistance devices.

Advantages

1. A simple, facile single step and low-cost method of producing magnetic hematite iron oxide (α- Fe2O3).
2. Synthesized α-Fe2O3 has a purity of at least 90%
3. The methods results in a large yield of magnetic α-Fe2O3 of at least 30-40 % of the total reactants.

Inventors

RAMAPRABHU S
ramp@iitm.ac.in
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Synthesis, characterization and catalytic properties of hierarchical(nanoporous) zeolites with MFI(ZSM-5),FAU (X,Y) and LTA (A) topologies

Synthesis, characterization and catalytic properties of hierarchical(nanoporous) zeolites with MFI(ZSM-5),FAU (X,Y) and LTA (A) topologies

Categories for this Invention

Ordered mesoporous zeolites, hierarchical zeolites,MFI-type, FAU-type. LTA-type. mesoporous ZSM-5, mesoporous zeolite-Y, mesoporous zeolite-X, mesoporous zeolite-A, solid acid catalysts.

Targeted Industries

Watermarking IP design,

Electronic circuits

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Applications

Solid acid catalysts production, catalysis and seperation process.

Problem Addressed

Templating agents are expensive, and selectivity towards conversion of phenol is low. There remains a need to develop a zeolite with ordered mesoporous structure with enhanced phenol conversion. Further, there exists a need for synthesizing cost effective catalyst which displays enhanced selectivity towards conversion of phenol

Abstract

Ordered and hierarchically porous zeolite crystal catalyst showing enhanced selectivity towards phenol conversion and a method for preparation of the catalyst are disclosed. A solution containing alumina, silica and an organosilane are mixed and treated at a particular temperature for a particular period of time under pre-determined conditions to obtain a highly crystalline zeolite. A MFI- type, FAU- type and LTA- type zeolites are obtained. The zeolite catalyst exhibits a hierarchically porous structure with ordered mesopores. The surface area of the zeolite is in the range of micropores is in the range of 2- 374 m2 g-1 and the size of the mesopores is in the range of 89 – 499 m2 g-1. The lifetime of the crystal is at least 20 h.

Advantages

1. hierarchically porous zeolite crystal catalyst
2. Enhanced selectivity towards phenol conversion.

Inventors

SELVAM P
selvam@iitm.ac.in
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