The inevitable usage of toxic lead impedes the commercialization of lead halide perovskite solar cells, especially considering lead ions potentially unseals from the discarded and damaged devices and consequently contaminates the environment. In this work, we proposed a poly(ionic liquid) (PIL) cohered sandwich structure (PCSS) to realize lead sequestration in perovskite solar cells by a water-proof and adhesive poly([1-(3-propionic acid)-3-vinylimidazolium] bis(trifluoromethanesulphonyl)imide (PPVI-TFSI). A transparent ambidextrous protective shield manufactured from PPVI-TFSI was achieved and applied in lead sequestration for perovskite solar cells. PCSS provides robustness and water-resistance, which improves device stability toward water erosion and extreme situations (such as acid, base, salty water, and hot water). PPVI-TFSI exhibited excellent affinity toward lead with adsorption capacity of 516 mg·g–1, which assisted to prevent lead leakage in abandoned devices as proved in the test of wheat germination vividly. PCSS provides a promising solution for complex lead sequestration and management issues, which contribute to the commercialization of perovskite solar cells.
In the realm of wearable technology, strategically placing sensors at various body locations enhances the detection of diverse physiological indicators crucial for remote medical care. However, current devices often focus on a single body part for specific physical parameters, which hinders the seamless integration of sensors across multiple body parts and necessitates redesign for new detection capabilities. Here, we propose a modular, reconfigurable circuit assembly method that can be adaptable for multiple body locations to construct the body net. By simply reassembling different child modules with the base module using flexible printed circuit board connectors, we can efficiently detect various parameters including sweat ion indicators, electrocardiogram signals, electromyography signals, motion data, heart rate, blood oxygen saturation, and skin temperature. These data can be transmitted to a mobile phone app via a Bluetooth Low Energy protocol for further evaluation. Comparative evaluations against established commercial devices substantiate the viability of our sensor technology. In addition, results from wearable body network detections using reconfigurable sensors across multiple body parts of volunteers also indicate promising application prospects, demonstrating the extensive potential for regular health monitoring and clinical applications.
An electrochemical device for portable on-site detection of gaseous CH 3 I based on the poly(1-vinylimidazole) film (PVIm-F) was reported with a significant selectivity and a low detection limit.
Materials containing large conjugated structures have good applications prospects in multiple fields due to their electron-rich properties. Nevertheless, the rigid structures of such materials make them difficult to process, making them difficult to be utilized adequately, which limits further development of their performance potentials. Herein, through ionic liquid solution process (ILSP), the electron-rich and fluorescent properties of pentacene have been successfully liberated to detect iodine vapor. Pentacene can be dissolved in BmimNTf2 to form (Ph)5@BmimNTf2 solution with excellent fluorescence. (Ph)5@BmimNTf2 solution was loaded onto polyamide membranes to prepare composite membrane detectors, which can detect iodine vapors, showing rapid response, portability and low cost. Theoretical calculations indicate a charge-transfer complex is formed between pentacene and iodine. The amount of charge transfer (δQ) between pentacene and iodine monomer molecules can be up to 0.0968e. This study provides potential for exploiting the applications of large conjugated materials utilizing ILSP.
Abstract Adsorption, storage, and conversion of gases (e.g., carbon dioxide, hydrogen, and iodine) are the three critical topics in the field of clean energy and environmental mediation. Exploring new methods to prepare high‐performance materials to improve gas adsorption is one of the most concerning topics in recent years. In this work, an ionic liquid solution process (ILSP), which can greatly improve the adsorption kinetic performance of covalent organic framework (COF) materials for gaseous iodine, is explored. Anionic COF TpPaSO 3 H is modified by amino‐triazolium cation through the ILSP method, which successfully makes the iodine adsorption kinetic performance (K 80% rate) of ionic liquid (IL) modified COF AC 4 tirmTpPaSO 3 quintuple compared with the original COF. A series of experimental characterization and theoretical calculation results show that the improvement of adsorption kinetics is benefited from the increased weak interaction between the COF and iodine, due to the local charge separation of the COF skeleton caused by the substitution of protons by the bulky cations of ILs. This ILSP strategy has competitive help for COF materials in the field of gas adsorption, separation, or conversion, and is expected to expand and improve the application of COF materials in energy and environmental science.
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