Significantly enhanced piezo-photocatalytic capability in BaTiO3 nanowires for degrading organic dye

Energy harvesting in wireless sensor networks: A taxonomic survey

Application of BaTiO3-based catalysts for piezocatalytic, photocatalytic and piezo-photocatalytic degradation of organic pollutants and bacterial disinfection in wastewater: A comprehensive review

Current piezoelectric device systems need a significant reduction in size and weight so that electronic modules of increasing capacity and functionality can be incorporated into a great range of applications, particularly in energy device platforms. The key question for most applications is whether they can compete in the race of down-scaling and an easy integration with highly adaptable properties into various system technologies such as nano-electro-mechanical systems (NEMS). Piezoelectric NEMS have potential to offer access to a parameter space for sensing, actuating, and powering, which is inflential and intriguing. Fortunately, recent advances in modelling, synthesis, and characterization techniques are spurring unprecedented developments in a new field of piezoelectric nano-materials and devices. While the need for looking more closely at the piezoelectric nano-materials is driven by the relentless drive of miniaturization, there is an additional motivation: the piezoelectric materials, which are showing the largest electromechanical responses, are currently toxic lead (Pb)-based perovskite materials (such as the ubiquitous Pb(Zr,Ti)O3, PZT). This is important, as there is strong legislative and moral push to remove toxic lead compounds from commercial products. By far, the lack of viable alternatives has led to continuing exemptions to allow their temporary use in piezoelectric applications. However, the present exemption will expire soon, and the concurrent improvement of lead-free piezoelectric materials has led to the possibility that no new exemption will be granted. In this paper, the universal approaches and recent progresses in the field of lead-free piezoelectric nano-materials, initially focusing on hybrid composite materials as well as individual nanoparticles, and related energy harvesting devices are systematically elaborated. The paper begins with a short introduction to the properties of interest in various piezoelectric nanomaterials and a brief description of the current state-of-the-art for lead-free piezoelectric nanostructured materials. We then describe several key methodologies for the synthesis of nanostructure materials including nanoparticles, followed by the discussion on the critical current and emerging applications in detail.

/pdf/progress-in-lead-free-piezoelectric-nanofiller-materials-and-u5s36q8kio.pdf

Progress in lead-free piezoelectric nanofiller materials and related composite nanogenerator devices

Piezoelectric materials have the merits of fast response, speed, and high precision. These materials have been widely investigated for functional device applications such as sensors, actuators, microelectromechanical systems (MEMS), nanoelectromechanical systems (NEMS), 3D‐printing etc. This paper offers a review on recent advances in piezoelectric materials and their limitations. In addition, different piezoelectric materials such as lead‐based, lead‐free piezoelectric materials etc. are discussed, and their applications in the catalysis, energy harvesting, sensors, biomedical engineering, and additive manufacturing are addressed.

A Review on Piezoelectric Materials and Their Applications

The sol–gel method exhibits the advantages of simple preparation, low cost, and easy control of stoichiometry, which is widely used for the fabrication of BiFeO3-based perovskite ferroelectric film

ModulatingPhotovoltaic Conversion Efficiency of BiFeO 3 ‑BasedFerroelectric Films by the Introduction of ElectronTransport Layers

The invention provides a preparation method of a BiFeO3 photovoltaic thin film. The performance of the BiFeO3 photovoltaic thin film is improved through secondary annealing. The BiFeO3 photovoltaic thin film prepared by applying the method has an excellent performance, and has the open-circuit voltage level being 1.35V to 1.40V, the short-circuit current density being 2.34mA/cm to 2.85mA/cm ,the fill factor being 73 percent to 79.1 percent, and the photoelectric conversion efficiency being 1.59 percent to 1.93 percent.

Preparation method of bismuth ferrite photovoltaic thin film, and bismuth ferrite photovoltaic thin film prepared through preparation method

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ModulatingPhotovoltaic Conversion Efficiency of BiFeO 3 ‑BasedFerroelectric Films by the Introduction of ElectronTransport Layers

Preparation method of bismuth ferrite photovoltaic thin film, and bismuth ferrite photovoltaic thin film prepared through preparation method