Priyanka Ganguly

London Metropolitan University · School of Human Sciences

Humidity sensing is crucial for several industrial, environmental, and healthcare applications, many of which require sensors in flexible form factors and with features such as disposability and facile fabrication processes. Herein, we present a flexible, cost-effective, and disposable humidity sensor developed on paper substrate. The screen-printe...

This work presents a flexible and disposable nitrogen dioxide (NO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> ) gas sensor based on Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), operating at room temperature (RT). The gas sensing layer, composed of PEDOT:PSS, is depos...

Despite the many recent advances in disposable and wearable sensing technologies for point of care testing (POCT), few affordable, flexible, and disposable sensors are available for the detection of tyrosine (Tyr), a valuable biomarker for metabolic and neurodegenerative diseases. In this regard, the disposable screen-printed electrodes on flexible...

Abstract Sweat is an important biofluid that is excreted by the human body. It contains physiological biomarkers that provide vital information on the general health condition of the body. As a result, analysis of electrolytes in this biofluid is gaining traction in the development of non-invasive sweat diagnostics to determine level of dehydration...

Metal sulfides are promising photocatalysts in virtue of inherent photoelectric properties and wide light absorption range. However, metal sulfides are usually subjected to photocorrosion and high carrier recombination. The assembly of metal sulfide-based Z-scheme heterojunctions not only can overcome the above shortcomings of metal sulfides, but a...

Estimation of pH is vital to assess the biochemical and biological processes in a wide variety of applications ranging from water to soil, health, and environment monitoring. This work reports a screen-printed flexible and disposable pH sensor using the impedimetric method. The pH sensor was fabricated by screen printing Graphene-Carbon modified Zi...

In recent years, efficient energy storage devices that exhibit superior power and energy densities have attracted major attention to meet the demands of emerging applications such as wearable systems. In this regard, supercapacitors (SCs) in various forms offer attractive solutions. The performance of SCs is highly dependent on the synthesis route...

This reference text provides a comprehensive overview of the latest developments in 2D materials for energy storage and conversion. It covers a wide range of 2D materials and energy applications, including 2D heterostructures for hydrogen storage applications, cathode and anode materials for lithium and sodium-ion batteries, ultrafast lithium and s...

The initial chapter focuses on introducing the various two-dimensional (2D) nanomaterials such as hexagonal boron nitride (h-BN), layered double hydroxides (LDHs), metal-organic frameworks (MOFs), MXene, and their composites are introduced. Various synthesis methods and applicable techniques to characterize the 2D nanomaterials are also explained....

The uncontrolled and unethical release of pharmaceutical contaminants into aquatic sources have severe adversities, including the possible emergence of antimicrobial resistant bacteria. Photocatalysis utilizing semiconductor heterostructures is a greener and sustainable option for the effective degradation of organic contaminants into relatively ha...

On-board sources of energy are critically needed for autonomous robots to work in unstructured environments for extended periods. Thus far, the power requirement of robots has been met through lead-acid and Li-ion batteries and energy harvesters. However, few advances such as light weight, the shape, and size of the batteries used in robotics have...

Nanostructured photocatalysts have always offered opportunities to solve issues concerned with the environmental challenges caused by rapid urbanization and industrialization. These materials, due to their tunable physicochemical characteristics, are capable of providing a clean and sustainable ecosystem to humanity. One of the current thriving res...

The recent advent of biodegradable materials has offered huge opportunity to transform healthcare technologies by enabling sensors that degrade naturally after use. The implantable electronic systems made from such materials eliminate the need for extraction or reoperation, minimize chronic inflammatory responses, and hence offer attractive proposi...

Titanium dioxide (TiO2) semiconductor photocatalysis is a sustainable technology that addresses global warming and energy needs using clean solar energy. Utilization of Z-scheme photocatalysts is one of the effective ways to maximize the photocatalytic activity owing to its effectiveness in the separation of photogenerated electron-hole pairs. The...

A two-step solvothermal synthesis was adopted to prepare AgXSe2-TiO2 (X = In, Bi) composites. DFT study of the pristine parent samples showed the formation of the hexagonal phase of AgBiSe2, and tetragonal phase of AgInSe2 and TiO2, which corroborated the experimentally synthesised structures. Both the AgBiSe2-TiO2 and AgInSe2-TiO2 composites displ...

Spatial charge separation is achieved by morphologically tuning TiO2 nanomaterials along with graphene by a hydrothermally modified sol-gel synthetic route. Morphology engineered TiO2 is constructed between nanocuboids with high energy {010}/{100} and {001}facets, and nanoellipsoids exposing low energy {101} facets. In situ grown titania hybridized...

The effect of chalcogens such as sulphur (S), selenium (Se), and tellurium (Te) on the anatase to rutile phase transition (ART) of titanium dioxide (TiO2) was investigated. 2 mol % of chalcogen doped TiO2 was synthesised via a sol–gel technique. The as-synthesised samples were calcined at different temperatures from 500 °C to 800 °C for 2 h. X-ray...

Hybrid nanoarchitectures of AgInS2 and TiO2 photocatalysts were prepared by using a modified sol–gel method. The experimental results reveal that these nanocomposites display enhanced visible light absorption and effective charge carrier separation compared to their pristine parent samples (AgInS2 or TiO2). 0.5 wt % AgInS2 loading was found to be t...

The need for cleaner alternative energy to fossil fuels has led to the development of a new realm of highly–efficient photoactive 2D nanostructures. With a thickness of a single or few atomic layers, the 2D nanomaterials (NMs) have high surface area. The strong in-plane chemical bonds along with weak van der Waals interaction make these materials l...

This paper shows that incorporation of Cu inhibits the anatase to rutile phase transition at temperatures above 500 °C. The control sample, with 0% Cu contained 34.3% anatase at 600 °C and transitioned to 100% rutile by 650 °C. All copper doped samples maintained 100% anatase up to 600 °C. With 2% Cu doping, anatase fully transformed to rutile at 6...

The formation of heterostructure nanocomposite has been demonstrated to be an effective route to enhance the photocatalytic efficiency. Ternary chalcogenides (TC) with remarkable visible light absorption, are identified as an ideal candidate to form heterostructure with classical semiconductors such as TiO⁠2. In the current investigation, novel het...

Semiconductor photocatalysis has garnered immense interest in recent years for water treatment processes because of its solar energy alteration and environmental remediation. Several contaminants of emerging concern, such as endocrine disrupting compounds and microbial strains, have been examined in the last decade. Photocatalytic treatment has bee...

Surface contamination by microbes is a major public health concern. A damp environment is one of potential sources for microbe proliferation. Smart photocatalytic coatings on building surfaces using semiconductors like titania (TiO2) can effectively curb this growing threat. Metal-doped titania in anatase phase has been proven as a promising candid...

Indoor surface contamination by microbes is a major public health concern. A damp environment is one potential sources for microbe proliferation. Smart photocatalytic coatings on building surfaces using semiconductors like titania (TiO₂) can effectively curb this growing threat. Metal-doped titania in anatase phase has been proved as a p...

The growth in production of manufactured goods and the use of nanomaterials in consumer products has mounted in the past few decades. Nanotoxicology or toxicity assessment of these engineered products is required to understand possible adverse effects and their fate inside the human body. The present review is a one stop assessment intended to be a...

Photocatalysis has recently been emerged as an effective green solution for antimicrobial disinfection applications. Photocatalytic disinfection has been observed to be efficient in deactivation of extensive varieties of organisms. Numerous gram positive and gram negative bacterial strains such as Escherichia coli, Staphylococcus aureus, Streptococ...

Materials combining the abilities of adsorption and photocatalysis provide a facile solution for pollutant disposal as secondary remediation processes are avoided. Herein, we report a simple strategy for the development of C3N4 anchored ZIF-8 microcrystals as sheathed architectures for the highly efficient adsorption and sun light induced photocata...

In this paper, we provide a comprehensive evaluation of graphitic carbon nitride (C3N4) powders derived from the four different precursors melamine, cyanamide, thiourea, and urea for the photocatalytic degradation of tetracycline (TC) antibiotic under sunlight irradiation. The powders were synthesized by employing the conventional thermal decomposi...

Environmental remediation employing semiconducting materials offer a greener solution for pollution control. Herein, we report the development of high surface area porous architecture of C3N4 nanosheets by a simple aqueous spray drying process. g-C3N4 nanosheets obtained by the thermal decomposition of urea-thiourea mixture are spray granulated to...

In this work, a novel colorimetric nanosensor was developed for the selective detection of triazophos in environmental water and food samples using bifunctionalized silver nanoparticles (Ag NPs) as a probe. The Ag NPs were bifunctionalized with 3-mercaptopropinonic acid (MPA) and guanidineacetic acid (GAA) and used as a colorimetric probe for the s...

The graphitic carbon nitride (g-C3N4) Ag/ZnO (CAZ) nanocomposite heterostructure was prepared by the copyrolysis of a precursor mixture containing melamine and nitrates of zinc and silver. This one-pot synthetic approach facilitated the incorporation of fine dispersions of Ag and ZnO on C3N4 sheets. The CAZ sample thus prepared exhibited higher ads...

Environmental remediation employing sunlight-active semiconductor nano-heterostructures provides effective solutions for handling emerging contaminants through a greener approach. Herein, we report the creation of ultrafine dispersions of Co3O4 nanoparticles in a g-C3N4 matrix by a simple one-pot synthetic strategy involving the co-pyrolysis of con...