Natural tourmaline for pyroelectric dye decomposition under 25–60 °C room-temperature cold-hot fluctuation

Flexible Hybridized Nanogenerators Based on a Reduced Graphene Oxide Nanosheet-Decorated Piezoceramic Skeleton to Impact Mechanical and Thermal Energy Harvesting

“…However, the nonconvenience caused by regular replacement and the environmental pollution caused by waste after use put forward an urgent need for new energy solutions to replace chemical batteries . For a polar material, the spontaneous polarization ( P s ) can be modulated by an external force field and/or temperature field to show piezoelectric effect and pyroelectric effect independently or simultaneously; thus, it can be used as an energy harvester to scavenge waste mechanical energy and thermal energy in the environment to achieve clean power generation. , Meanwhile, in recent years, catalytic applications related to polar materials have attracted wide attention, and some important achievements have been reported. − As representative polar materials, ferroelectric ceramics such as BaTiO 3 (BT) and Pb­(Zr,Ti)­O 3 (PZT) have excellent piezoelectric and pyroelectric properties. , However, due to their inherent rigidity and brittleness, they cannot be used as energy harvesters to match wearable electronic devices. In contrast, the ferroelectric polymers represented by polyvinylidene difluoride (PVDF) and polyvinylidene fluoride-trifluoroethylene (P­(VDF-TrFE)) have the advantages of flexibility and good machinability, but the weak piezoelectric properties and poor thermal conductivity affect their application as a piezoelectric or pyroelectric energy harvester. − By introducing low-dimensional ferroelectric particles into an organic polymer, the formed piezocomposites can combine the merits of both materials; thus, the derived flexible hybridized nanogenerators (FHNGs) have become a research hotspot in the field of energy harvesting. − It should be noted that for piezocomposites, the ferroelectric filler is the main contributor to piezoelectric and pyroelectric effects, and the polymer is mainly used as the matrix to ensure flexibility .…”

Nano PDA@Tur-Modified Piezoelectric Sensors for Enhanced Sensitivity and Energy Harvesting

“…Also, it has piezoelectricity and thermoelectricity simultaneously. Wu et al used tourmaline micropowder to chemically deal with dyes wastewater under 25–60 °C heating–cooling cyclic excitation, and the decomposition ratio of rhodamine B in wastewater achieved 84.7%. Up to now, tourmaline has been widely used in environmental protection, chemical industry, building materials, and other fields. − …”