• Energy Research

Metal–organic frameworks (MOFs) have emerged as a transformative class of materials in materials science and chemistry due to their exceptional porosity and structural tunability. Composed of metal ions or clusters intricately coordinated with organic ligands, MOFs form highly ordered 3D networks with well‐defined pores and channels. These unique characteristics enable precise customization of pore size, shape, and functionality through the selection of appropriate metal ions and ligands, unlocking diverse applications across multiple fields. This review provides a comprehensive exploration of MOFs, focusing on their synthesis, structural properties, and versatility. Key areas of discussion include MOFs’ potential for catalytic activity, gas storage, sensing, and drug delivery. Of particular importance is their transformative role in environmental remediation, energy storage, and biomedical applications, demonstrating their adaptability to modern challenges. However, significant barriers such as scalability, long‐term stability, and economic viability must be addressed to enable widespread adoption. By detailing state‐of‐the‐art advancements, this review highlights MOFs’ unparalleled ability to achieve precision and efficiency in targeted applications, offering valuable insights for emerging researchers. The findings underscore MOFs’ pivotal role in addressing contemporary scientific and industrial challenges, paving the way for innovative solutions in energy, environment, and health.

Harvesting ambient mechanical energy from the environment has gained immense interest due to its application in energy harvesting and active sensing. Herein, an ABO3 class ferroelectric semiconducting material BaTiO3 nanoparticles are used, and Antimony (Sb) is used as a dopant, which can be able to enhance the piezoelectric coefficient of BaTiO3 to a higher level, leading to increased energy‐harvesting performances. The fabricated antimony‐doped barium titanate [Sb‐doped BaTiO3 designated as (BST)] is then blended with polydimethylsiloxane (PDMS) to prepare a composite film. Electrodes are then attached with the composite film on either side to fabricate the flexible composite piezoelectric nanogenerator (FCF‐PENG) device. The fabricated FCF‐PENG device generates a maximum electrical output of peak‐to‐peak 28 V and 1.5 μA, respectively. The device also shows a good power density of 1.6 mW m−2 at the load resistance of 80 MΩ. At last, a real‐time impact sensor was fabricated to employ the device as the wearable impact sensor. The fabricated impact sensor detects the impact from high to low upon the human collision impact tested within the laboratory and the impact values are recorded and monitored with indicator using ESP32 microcontroller and ThingSpeak cloud. The above analysis and the real‐time experiments proved that the fabricated impact sensor paves the way toward sports healthcare and rehabilitation with Internet of Things (IoT) devices soon.

Carbon quantum dots (CQDs) have recently emerged as innovative theranostic nanomaterials, enabling fast and effective diagnosis and treatment. In this study, a facile hydrothermal approach for N-doped biomass-derived CQDs preparation from Citrus clementina peel and amino acids glycine (Gly) and arginine (Arg) has been presented. The gradual increase in the N-dopant (amino acids) nitrogen content increased the quantum yield of synthesized CQDs. The prepared CQDs exhibited good biocompatibility, stability in aqueous, and high ionic strength media, similar optical properties, while differences were observed regarding the structural and chemical diversity, and biological and antioxidant activity. The antiproliferative effect of CQD@Gly against pancreatic cancer cell lines (CFPAC-1) was observed. At the same time, CQD@Arg has demonstrated the highest quantum yield and antioxidant activity by DPPH scavenging radical method of 81.39 ± 0.39% and has been further used for the ion sensing and cellular imaging of cancer cells. The obtained results have demonstrated selective response toward Fe3+ detection, with linear response ranging from 7.0 µmol dm−3 to 50.0 µmol dm−3 with R2 = 0.9931 and limit of detection (LOD) of 4.57 ± 0.27 µmol dm−3. This research could be a good example of sustainable biomass waste utilization with potential for biomedical analysis and ion sensing applications.

AbstractThe demand for sustainable energy resources to power sensor networks such as consumer electronics, agricultural technologies, digital forest management, and home automation is rapidly increasing. There are sustainability challenges to consider, where waste waterproof textiles are critical to encourage the development of a circular economy in the development of new energy technologies. This present work focuses on the utilization of direct waste waterproof textiles to design two types of triboelectric nanogenerator (TENG), which include a liquid‐solid based TENG (L‐S TENG) and a flapper‐type TENG. The bottom electrode configuration for the L‐S TENG and single electric mode working mechanism is considered for the flapper‐type TENG. Waste waterproof textiles can lead to a possible expansion of sustainable material for energy harvesters. The raincoat textile‐based L‐S TENG (L‐STENG‐R) is able to generate 0.5 V at a tilt angle of 50 degrees and power of 0.41 nW. TENGs based on discarded waterproof textiles are further utilized to demonstrate their phase change sensing, along with wind and water energy harvesting. This approach focus on decreasing waste and lower dependency on traditional resources to support environmentally responsible energy alternatives.