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
November 21,2024

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Hamas says the Israeli regime’s sole objective lies in “erasing” the entirety of the Palestinian population from across the Palestinian territories.

Khalil al-Hayya, a ranking official with the Gaza Strip-based Palestinian resistance movement, made the remarks to the Palestinian al-Aqsa TV on Wednesday.

“The occupation targets everyone—it strikes hospitals, civil defense, women, children, and the elderly,” he said, adding that the regime sought to “empty Gaza of its residents, and displace the Palestinian people to fulfill its dreams of building a Zionist Jewish state across all of Palestine.”

The remarks came amid the regime’s October 2023-present war of genocide on the coastal sliver that has so far claimed the lives of nearly 44,000 Palestinians, mostly women and children.

“This unprecedented aggression in modern times evokes scenes from the dark ages of human history, having crossed all red lines and exceeded every expectation of brutality in the modern era,” the Palestinian official lamented.

He also regretted that the regime had added “systematic and dangerous starvation to its aggression, falsely claiming before the world that it allows 250 [aid] trucks into Gaza daily. In reality, the number of trucks is far fewer.”

Hayya, meanwhile, regretted that “scenes of children torn apart, women screaming over their children, and heart-wrenching destruction have failed to stir enough humanity to stop these crimes.”

He decried the United States for vetoing the United Nations Security Council’s resolutions that are aimed at bringing about a potential ceasefire in the war, saying this indicated Washington’s “partnership in the aggression” and a simultaneous siege that the Israeli regime has been enforcing on Gaza.

Addressing Israeli Prime Minister Benjamin Netanyahu, the official asserted that, despite what the Israeli official is after, Hamas would not hand over the regime’s captives “without [the regime’s] stopping the war.”

He called Netanyahu “the main obstacle” in the way of cessation of the aggression, saying the Israeli premier “blocks any progress for political reasons,” and citing his preventing conclusion of a ceasefire agreement in July.

Hayya also warned that the regime sought to expand the war beyond Gaza, but asserted that its goals are “impossible and will never happen.”

“Today, the enemy exposes its true intentions of extermination and displacement, but it will fail,” he stressed.

“The Palestinian people are resilient and will not surrender, as they believe in their humanitarian and political cause. The enemy and its allies will not succeed in achieving their goals. This steadfast people will endure, and the occupation will not prevail against them.”

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News Network
November 10,2024

Bengaluru: The Karnataka government has warned that disciplinary action will be taken against those officials who change the land mutation records and serve eviction notices to farmers under the Waqf Act.

In a letter, the Revenue Department Principal Secretary Rajender Kumar Kataria reminded all regional commissioners and deputy commissioners in the districts that Chief Minister Siddaramaiah recently had a meeting following complaints about certain land properties being made in favour of the Karnataka Board of Waqfs.

In the meeting it was decided that all the directions issued previously by any government office or authority to change the mutation records has been withdrawn, the letter said.

It added that all the notices served in the past have also been withdrawn and no action should be taken against the farmers who are cultivating on the said land.

On the directions of the chief minister, the previous letters and the latest reminders served on November 7 to the farmers and land owners have been withdraw, the letter said.

"The officials who served reminder-2 despite the chief minister's direction will face appropriate disciplinary action," Kataria said in his letter.

He said he has been instructed to strictly implement the chief minister's direction.

The fresh direction was issued in poll-bound Karnataka, where bypolls to three crucial assembly segments are due on November 13.

Some farmers in Honwad village in Vijayapura in north Karnataka had alleged last month that they were served eviction notices as the Waqf Board claimed rights over it.

Subsequently, complaints started in pouring in from some other parts of the state.

BJP leader Tejasvi Surya on October 25 alleged that Karnataka Waqf Minister B Z Zameer Ahmed Khan directed the deputy commissioners and revenue officials to register lands in favour of the Waqf Board within 15 days, which resulted in confusion.

On Surya's request, the Chairman of the Joint Committee of Parliament on the Waqf (Amendment) Bill, Jagdambika Pal visited Karnataka on November 7 and met farmers in Hubballi, Vijayapura and Belagavi districts who had alleged that their lands were marked as Waqf properties.

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News Network
November 13,2024

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Beirut: The Israeli army on Tuesday continued to launch attacks against civilians in Lebanon, targeting them in several areas without prior evacuation warnings.

However, 13 airstrikes on Beirut’s southern suburbs in the space of only three hours were preceded by evacuation warnings.

The attacks caused no injuries but resulted in widespread destruction of residential buildings and commercial, medical and educational centers.

The airstrikes in southern Lebanon and Bekaa region, reaching Akkar in Lebanon’s far north, erased any hope of a near-term ceasefire settlement.

The strikes were accompanied by an announcement on Israel’s Channel 14 that “the Israeli army has expanded its operations in southern Lebanon to areas it had not reached since the beginning of the ground operation.”

About 50 days have passed since Israel intensified its hostile operations in Lebanon targeting Hezbollah. The death toll from these confrontations and attacks has passed 3,200, with more than 14,000 wounded.

For the first time, an airstrike targeted a mountainous area between Baalchmay and Aabadiyeh on the road leading to Aley, destroying a building housing displaced people.

The mayor of Baalchmay, Adham Al-Danaf, confirmed that “the airstrike targeted a residential building in the Dhour Aabadiyeh area.”

The initial toll from the Ministry of Health showed “five people killed and two injured.”

The raids that targeted Beirut’s southern suburbs for the first time in the morning, unlike nightly raids before, caused huge destruction. Those who evacuated their homes after Israeli warnings, used their phones to record the collapse of empty buildings in Sfeir, Haret Hreik, Bir Al-Abed, Mrayjeh, Laylaki and Hadath.

Israeli warplanes also targeted Tyre, where a strike on a building killed three people and injured many others, while a raid on Tefahta killed a man identified as Kifah Khalil and his family.

Attacks were widespread, with Yater and Zebqine subject to artillery shelling, a civilian being killed in Hermel, and further attacks on Bouday and an area between the towns of Srifa and Arsoun.

A raid on the town of Siddiqin killed two people and injured several others, while an attack on the Mechref farm led to one fatality and multiple injuries.

The search for those missing after an Israeli raid on the town of Ain Yaacoub in Akkar, in the northernmost part of Lebanon, continued until dawn.

During the operation, 14 bodies were retrieved, identified as those of residents displaced from the town of Arabsalim in the Iqlim Al-Tuffah area of the south, along with members of a Syrian family, a mother and three of her children. Additionally, there were 10 people in critical condition.

The targeted residence belongs to a Lebanese citizen, Hussein Hashim, who is reported to be a member of the Syrian Social Nationalist Party.

An airstrike on the town of Saksakiyeh in the Sidon region on Monday night resulted in yet another tragedy.

It appeared that the intended target was the Shoumer family, who just days before lost Hussein Amin Shoumer and his two sisters in a drone strike near Al-Awali River.

Israeli army spokesperson Avichay Adraee issued additional evacuation warnings for towns in the southern region along the Litani River, which, according to estimates from the mayors, are currently 90 percent uninhabited.

In the meantime, Hezbollah announced its continued efforts to “combat the intrusions of Israeli forces and to strike military installations and towns in the north.”

Hezbollah said in a statement that it confronted “an Israeli Hermes 450 drone in the airspace of Nabatieh and forced it to leave Lebanese airspace.”

The party also announced that it targeted “Kfar Blum settlement with a rocket salvo.”

On the Israeli side, air raid sirens sounded in areas of Upper and Western Galilee and in the town of Kiryat Shmona and its surroundings.

The Israeli army confirmed that “a drone exploded in Nesher, east of Haifa, without activating the air raid sirens,” and that “a drone launched from Lebanon crashed into a school in Gesher HaZiv, north of Nahariya.”

Israel’s Channel 13 reported the Israeli military’s assessment regarding Hezbollah’s military strength, claiming that the group currently possesses approximately 100 precision missiles, thousands of artillery shells, and hundreds of rockets. Additionally, it was highlighted that “there are around 200 Lebanese towns that remain unvisited.”

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