IIT scientists use waste onion skin to generate electricity

Agencies
December 18, 2017

New Delhi, Dec 18: Scientists at IIT Kharagpur have used waste onion skins to develop an inexpensive device that can generate 'green' electricity from body movements and may power pacemakers, smart pills and wearable electronics.

The non-toxic, biodegradable and biocompatible device takes advantage of the suitable piezoelectric properties of the onion skin, researchers said.

Piezoelectric materials have the ability to convert energy from everyday mechanical motions into electricity.

"This homespun inexpensive innovative finding can be a breakthrough scientific research in a new direction; even common people can generate energy in any circumstances using this simple novel cost-effective idea," Bhanu Bhusan Khatua, a professor at Indian Institute of Technology (IIT) Kharagpur in West Bengal said.

Increasing population, industrialisation, and ubiquitous use of electronics and vehicles are playing a huge role in destroying the environment day by day.

The rising burden on fossil fuels and depletion of natural resources has made the development of sustainable and alternative green energy technologies a pressing requirement in current energy deficiency world, researchers said.

Piezoelectric materials can be used to convert simple body movements into green energy without adding any pollution to our environments.

However, piezoelectric nanogenerators are difficult to synthesise and are often very expensive. They are also usually highly toxic or pose environmental hazards, which means their use in real life application remains limited.

These drawbacks prompted researchers at IIT Kharagpur and Pohang University of Science and Technology in South Korea to develop a non-toxic, biodegradable and biocompatible piezoelectric nanogenerator (BPNG).

Among various cellulose containing bio-materials, onion skin is the most abundant bio-waste, said Khatua.

"This motivated us to study the piezoelectric coefficient of the onion skin and its suitability as a bio- piezoelectric material," Khatua said.

"The uniqueness of our work lies in the novelty of utilising naturally abundant biocompatible and biodegradable onion skin directly as efficient piezoelectric material, which is thrown as tonne-scale garbage in every day worldwide," he said.

The device could be used in various biomedical applications such as pacemakers powered by heartbeats or edible devices that can track health from inside the body.

Researchers estimate that the device could be manufactured easily at a cost of less than a rupee, with existing technologies. This would make the system accessible to people the economically weaker sections of the society.

To build the device, the researchers coated an onion skin with a thin layer of gold and added copper wires with silver paste. It was then encapsulated in polymers.

The nanogenerator is capable of harvesting several types of mechanical energies, including body movements, wind flow and even machine vibrations.

The device developed by researchers has an output of 18 volts and can turn on 30 green LEDs under repeated human finger touch response, according to the study published in the journal NanoEnergy.

The device could withstand repeated cycles of pressing and releasing for up to five months. The voltage generated remained almost unchanged even after long cycles, indicating good mechanical stability of the device for bio-medical applications, researchers said.

"We also studied the durability of the device under sewing machine vibration for 10,000 cycles. From the result it can easily be said that the device had enough mechanical durability and chemical stability for realistic applications," Khatua said.

The researchers, including Sumanta Kumar Karan and Sandip Maiti from IIT, are optimistic about commercialising the technology soon, although more research is required before it can be realised in practical applications.

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News Network
March 7,2020

Srinagar, Mar 7: Two more accused, including a man who allegedly bought chemicals online for making improvised explosive device (IED) to be used in an attack on a convoy of the Central Reserve Police Force (CRPF) in Jammu and Kashmir's Pulwama last year, were arrested by the National Investigation Agency (NIA) on Friday, an official said.

The terror attack left 40 CRPF personnel dead in south Kashmir's Pulwama last year.

Waiz-ul-Islam, 19, from Srinagar and Mohammad Abbass Rather, 32, from Pulwama were arrested by the NIA, taking the number of those arrested in the case in the past week to five.

"During initial interrogation, Islam disclosed that he used his Amazon online shopping account to procure chemicals for making IEDs, batteries and other accessories on the directions of Pakistani Jaish-e-Mohammed (JeM) terrorists," the official said.

He said Islam personally delivered the items to the JeM terrorists after buying them online as a part of the conspiracy to carry out the attack.

"Rather is an old overground worker of the JeM. He has disclosed that he gave shelter at his home to Jaish terrorist and IED expert Mohd Umar after he came to Kashmir in April-May 2018," the official said.

Rather also sheltered other JeM terrorists - suicide bomber Adil Ahmad Dar, Sameer Ahmed Dar and Kamran, a Pakistani -- at his house before the Pulwama attack, the official said.

"He also facilitated safe shelter for the JeM terrorists, including Adil, at the house of accused Tariq Ahmed Shah and his daughter Insha Jan of Hakripora, who were arrested on March 3," the official said.

He said Islam and Rather will be produced before the NIA special court in Jammu on Saturday, while further investigation in the case continues. The NIA took over the case to probe the conspiracy behind the February 14, 2019, attack in Pulwama.

The last video of Adil, which was released by the JeM from Pakistan after the terror attack, was filmed at the home of Tariq Ahmed Shah. On February 28, the NIA achieved a major breakthrough in the case when it arrested 22-year-old Shakir Bashir Magrey, a furniture shop owner and resident of Pulwama.

Magrey had given shelter and other logistical assistance to suicide bomber Adil. He was introduced to Adil in mid-2018 by Pakistani terrorist Mohammad Umar Farooq and he became a full-time OGW of the JeM.

The explosives used in the attack were determined through forensic probe to be ammonium nitrate, nitro-glycerin and RDX. During investigation into the attack, the identity of the suicide bomber to be Adil Ahmad Dar was confirmed through DNA matching with that of his father.

The other key terrorists involved in the attack have been found to be JeM's south Kashmir divisional head Muddasir Ahmad Khan, killed in an operation by the security forces on March 11 last year; Pakistani terrorists Muhammad Umar Farooq and IED expert Kamran, both killed on March 29 last year; the owner of the car Sajjad Ahmad Bhat, a resident of Anantnag who was killed on June 16 last year, and Qari Yassir, JeM's commander for Kashmir who was killed on January 25 this year.

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Agencies
February 18,2020

British lawmaker Debbie Abrahams' e-Business visa was revoked as she was involved in anti-India activities and the cancellation was conveyed to her on February 14, government sources said on Tuesday.

Asserting that the grant, rejection or revocation of a visa or electronic travel authorisation is the sovereign right of a country, the sources said Abrahams was issued an e-Business visa on October 7 last year which was valid till October 5, 2020 for attending business meetings.

"Her e-Business visa was revoked on February 14, 2020 on account of her indulging in activities which went against India's national interest. The rejection of the e-Business visa was intimated to her on February 14," a source said.

Abrahams, who chairs a British parliamentary group on Kashmir, was denied entry into India upon her arrival at the New Delhi airport on Monday.

Government officials had said on Monday also that she was informed in advance that her e-visa had been cancelled.

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News Network
May 12,2020

London, May 12: British Prime Minister Boris Johnson has warned that a mass vaccine for the novel coronavirus may be over a year away and, in the worst-case scenario, may in fact never be found.

In his foreword to the government’s new 50-page guidance on a step by step easing of the lockdown measures in place to control the spread of the deadly virus, the UK prime minister lays out plans for businesses to gradually start reopening with “COVID-19 Secure” measures of social distancing and for the public to use “good solid British common sense” as the economy is unlocked.

“A mass vaccine or treatment may be more than a year away,” said Johnson, highlighting the work being done in the UK by scientists at Oxford University and Imperial College London towards this mission.

“Indeed, in a worst-case scenario, we may never find a vaccine. So our plan must countenance a situation where we are in this, together, for the long haul, even while doing all we can to avoid that outcome,” he said.

Admitting that a vaccine or drug-based treatment is the only “feasible long-term solution”, he said the UK has accelerated this with “promising” vaccine development programmes and a collaboration between Oxford University and pharma major AstraZeneca was a vital step that could help rapidly advance the manufacture of a Covid-19 vaccine when it is ready.

As part of global efforts, he flagged the GBP 388 million in aid funding for research into vaccines, tests and treatment, including GBP 250m to the Coalition for Epidemic Preparedness Innovations.

“But while we hope for a breakthrough, hope is not a plan,” he said, as he unveiled his plan for starting to lift lockdown restrictions from this week in phases.

Following a televised address to the nation on Sunday night and a statement in Parliament on Monday, the guidance comes into effect in public life across England from Wednesday when people will be allowed one-to-one contact with people other than those they live with, as long as they remain outside and two metres apart.

They are allowed to play sport with a friend or family member from outside their household or socialise with them in the open air for the first time in more than six weeks since the lockdown was imposed.

People are still advised to work from home where possible but start heading into work where necessary, in sectors such as construction and manufacturing, keeping the social distancing norms in place.

Under the step by step plan, by the start of next month non-essential shops will also reopen, with some hairdressers, pubs and cinemas to follow from July. However, as part of a Covid-19 Alert System, if infection rates are seen to be rising again, restrictions would be tightened “possibly at short notice”.

Fines for breaching the new rules will also be increased to GBP 100 and will double for each repeat offence, up to a maximum of GBP 3,200.

Johnson said: "I must ask the country to be patient with a continued disruption to our normal way of life, but to be relentless in pursuing our mission to build the systems we need. The worst possible outcome would be a return to the virus being out of control – with the cost to human life, and – through the inevitable re-imposition of severe restrictions – the cost to the economy. We must stay alert, control the virus, and in doing so, save lives.

“Then, as vaccines and treatment become available, we will move to another new phase, where we will learn to live with Covid-19 for the longer term without it dominating our lives.”

The devolved administrations of Scotland and Wales are putting their own measures in place and keeping the “stay at home” message in place, rather than switch to the new “stay alert” message.

The UK government’s latest messaging has come under attack from the Opposition and other sections of society over a feared lack of clarity for the general public.

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