CuI/Nylon Membrane Hybrid Film with Large Seebeck Effect

2021 ◽  
Vol 38 (12) ◽  
pp. 126701
Author(s):  
Xiaowen Han ◽  
Yiming Lu ◽  
Ying Liu ◽  
Miaomiao Wu ◽  
Yating Li ◽  
...  
Keyword(s):  
Room Temperature ◽  
Hybrid Film ◽  
Low Cost ◽  
Electrical Energy ◽  
Wide Bandgap ◽  
Wet Chemical Method ◽  
Nylon Membrane ◽  
Environmental Friendliness ◽  
Wet Chemical ◽  
Finger Touch

Room-temperature thermoelectric materials are important for converting heat into electrical energy. As a wide-bandgap semiconductor material, CuI has the characteristics of non-toxicity, low cost, and environmental friendliness. In this work, CuI powder was synthesized by a wet chemical method, then CuI film was formed by vacuum assisted filtration of the CuI powder on a porous nylon membrane, followed by hot pressing. The film exhibits a large Seebeck coefficient of 600 μV · K−1 at room temperature. In addition, the film also shows good flexibility (∼95% retention of the electrical conductivity after being bent along a rod with a radius of 4 mm for 1000 times). A finger touch test on a single-leg TE module indicates that a voltage of 0.9 mV was immediately generated within 0.5 s from a temperature difference of 4 K between a finger and the environment, suggesting the potential application in wearable thermal sensors.

An Ultra-Simple Method for Synthesis of Violet CdS Quantum Dots at Sub-Room Temperature

2020 ◽  
Vol 20 (6) ◽  
pp. 3935-3938 ◽  
Author(s):  
Chandan Yadav ◽  
Karan Surana ◽  
Pramod K. Singh ◽  
Bhaskar Bhattacharya
Keyword(s):  
Quantum Dots ◽  
Room Temperature ◽  
Uv Light ◽  
Xrd Analysis ◽  
Wet Chemical Method ◽  
Simple Method ◽  
Light Emitting ◽  
Violet Color ◽  
Wet Chemical ◽  
Sensitized Solar Cells

The emergence of fluorescence quantum dots (QDs) has led to the development of variety of applications in science and technology. Owing to the diverse optical and electrical properties of CdS QDs we have synthesized the same using wet chemical method. The QDs have been prepared at sub-room temperature using a new solvent comprising a mixture of water and methanol. The QDs when seen under UV light radiate violet color. The band-gap of the QDs deduced from the absorption spectra was 3.08 eV while PL spectra of the QDs suggested possibility of multiple exciton generation with a close to narrow size distribution. XRD analysis confirmed cubic structure of the particles. The obtained results suggest that these QDs can play ideal role in quantum dot sensitized solar cells (QDSSC) or in light emitting diodes (LEDs).

Fabrication and characterization of n-ZnO nanorods/p-Si (100) heterojunction

2015 ◽  
Vol 24 (04) ◽  
pp. 1550050 ◽  
Author(s):  
Kieu Loan Phan Thi ◽  
Lam Thanh Nguyen ◽  
Anh Tuan Dao ◽  
Nguyen Huu Ke ◽  
Vu Tuan Hung Le
Keyword(s):  
Chemical Method ◽  
Room Temperature ◽  
Zno Nanorods ◽  
Average Height ◽  
X Ray Diffraction ◽  
Wet Chemical Method ◽  
X Ray ◽  
Wet Chemical ◽  
Fabrication And Characterization

In this paper, ZnO nanorods were grown by wet chemical method on p-Si (100) substrate to form n-ZnO nanorods/p-Si (100) heterojunction. The optical, electrical, structural properties of n-ZnO nanorods/p-Si(100) heterojunction were analyzed by the photoluminescence (PL) spectroscopy, [Formula: see text]–[Formula: see text] measurement, X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. The room temperature PL spectra reveal the good optical property of the heterojunction with strong UV peak at 385[Formula: see text]nm. The ZnO nanorods were vertically well-aligned on p-Si (100) and had an average height of about 1.6[Formula: see text][Formula: see text]m. The n-ZnO nanorods/p-Si (100) heterojunction also exhibits diode-like-rectifying-behavior.

Synthesis and Evaluation of Hollow-Tubular ZnO by Wet Chemical Method

2007 ◽  
Vol 124-126 ◽  
pp. 571-574
Author(s):  
Hideaki Murase ◽  
Shoichiro Shio ◽  
Atsushi Nakahira
Keyword(s):  
Chemical Process ◽  
Aging Process ◽  
Chemical Method ◽  
Room Temperature ◽  
Single Phase ◽  
Chemical Processing ◽  
Wet Chemical Method ◽  
High Transparency ◽  
Wet Processing ◽  
Wet Chemical

In this study, morphology control of ZnO was performed by a wet chemical processing without templates at room temperature. In special, the effect of aging time and pH of this wet processing on ZnO morphologies was in detail investigated. As a result, products composed of a single phase of ZnO with a unique morphology like a hollow tube were obtained. Then, it was found that an aging process played an important role on controlling morphology of ZnO during this wet chemical process. Furthermore, it was found that this hollow-tubular ZnO had a high transparency.

Synthesis, Microstructure and Magnetic Properties of Nanocrystalline Ni-Zn Ferrite by a Modified Wet Chemical Method

2008 ◽  
Vol 368-372 ◽  
pp. 594-597
Author(s):  
Yin Liu ◽  
Tai Qiu
Keyword(s):  
Grain Size ◽  
Magnetic Properties ◽  
Room Temperature ◽  
Wet Chemical Method ◽  
Specific Saturation Magnetization ◽  
Random Anisotropy ◽  
Zn Ferrite ◽  
Wet Chemical ◽  
Critical Grain Size ◽  
Microstructure And Magnetic Properties

Nanocrystalline Ni1-xZnxFe2O4 ferrites with 0 ≤ x ≤ 1 were prepared by sprayingcoprecipitation method. The microstructure was investigated by TG-DSC, XRD, SEM, TEM and BET. Magnetic properties were measured with vibrating sample magnetometer at room temperature. The results showed that uniform and fine nanocrystalline Ni1-xZnxFe2O4 ferrites are obtained. The grain size of sample calcined at 600°C for 1.5h is about 30nm. There are a few agglomerates with average sizes below 100nm. The specific saturation magnetization, Ms, of the sample increases with increasing Zn2+ concent x at room temperature, and the maximum Ms is 66.8 A·m2·kg-1 as the Zn2+ content x is around 0.5mol. As calcining temperature increased from 400°C to 1050°C, the Ms of Ni0.5Zn0.5Fe2O4 ferrite increases from 40.2 A·m2·kg-1 to 75.6 A·m2·kg-1. The coercivity maximum is about 5.97 kA·m-1 as its critical grain size is about 62.0nm. The relation between coercivity and grain size for nanocrystalline Ni0.5Zn0.5Fe2O4 ferrite may be explained based on random anisotropy theory.

Perovskites beyond photovoltaics: field emission from morphology-tailored nanostructured methylammonium lead triiodide

2017 ◽  
Vol 19 (39) ◽  
pp. 26708-26717 ◽  
Author(s):  
Nripen Besra ◽  
Shreyasi Pal ◽  
Bikram Kumar Das ◽  
Kalyan Kumar Chattopadhyay
Keyword(s):  
Field Emission ◽  
Chemical Method ◽  
Room Temperature ◽  
Wet Chemical Method ◽  
Synthesis Parameters ◽  
Simple Variation ◽  
Wet Chemical

Herein, methylammonium lead triiodide (CH3NH3PbI3) nanorods and nanocrystals were prepared by a facile room-temperature wet chemical method via simple variation of the synthesis parameters and their field emission performances were investigated.

Methanolysis of ammonia borane by shape-controlled mesoporous copper nanostructures for hydrogen generation

2015 ◽  
Vol 44 (3) ◽  
pp. 1070-1076 ◽  
Author(s):  
Qilu Yao ◽  
Ming Huang ◽  
Zhang-Hui Lu ◽  
Yuwen Yang ◽  
Yuxin Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Chemical Method ◽  
Room Temperature ◽  
Hydrogen Generation ◽  
Ammonia Borane ◽  
Wet Chemical Method ◽  
Wet Chemical ◽  
Shape Controlled ◽  
Cu Nanostructures

A facile and scaleable wet-chemical method has been successfully applied to the synthesis of diverse mesoporous Cu nanostructures, which exhibited excellent catalytic activity for hydrogen generation from the methanolysis of AB at room temperature.

Facile synthesis of Fe-baicalein nanoparticles for photothermal/chemodynamic therapy with accelerated Fe(III)/Fe(II) conversion

2021 ◽  
Author(s):  
Zhendong Liu ◽  
Chunling Hu ◽  
Sainan Liu ◽  
Lihan Cai ◽  
Ying Zhou ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Conversion Efficiency ◽  
Chemical Method ◽  
Room Temperature ◽  
Antitumor Efficacy ◽  
Wet Chemical Method ◽  
Facile Synthesis ◽  
Photothermal Conversion ◽  
Wet Chemical

Fe(II)-baicalein-polyethylene glycol (Fe-BaP) nanoparticles were synthesized by a room temperature wet chemical method via coordination between Fe(II) and baicalein. Fe-BaP possessed high photothermal conversion efficiency (η=45.6%) and excellent antitumor efficacy...

Compositionally controlled band gap and photoluminescence of ZnSSe nanofibers by electrospinning

CrystEngComm ◽  
2015 ◽  
Vol 17 (24) ◽  
pp. 4434-4438 ◽  
Author(s):  
Lin-Jer Chen ◽  
Chia-Rong Lee ◽  
Yu-Ju Chuang ◽  
Zhao-Han Wu ◽  
Chienyi Chen
Keyword(s):  
Green Chemistry ◽  
Band Gap ◽  
Chemical Method ◽  
Composition Range ◽  
Low Cost ◽  
Entire Composition Range ◽  
Wet Chemical Method ◽  
Wet Chemical

A simple, non-toxic, low-priced, and reproducible manipulation, which meets the standards of green chemistry, is introduced for the synthesis of ZnSxSe1−x nanofibers. ZnSxSe1−x nanofibers have been prepared in the entire composition range from ZnSe to ZnS by using a low-cost wet-chemical method.

scholarly journals ZnO MICRORODS SURFACE-DECORATED BY WO3 NANORODS FOR ENHANCING NH3 GAS SENSING PERFORMANCE

2018 ◽  
Vol 54 (1A) ◽  
pp. 151 ◽  
Author(s):  
Nguyen Dac Dien
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Weight Ratio ◽  
Average Diameter ◽  
Wet Chemical Method ◽  
Hydrothermal Route ◽  
Reaction Route ◽  
Response Recovery ◽  
Wet Chemical ◽  
20 Nm

Regularly shaped, single-crystalline ZnO microrods (MRs) with wurtzite structure were prepared via a wet chemical method. The obtained rods possess average diameter and length of 350 nm and 3.5 μm, respectively. Besides, WO3 nanorods (NRs) with the size of 20 nm in diameter and 120 nm in length were synthesized by hydrothermal route. A facile solid state reaction route was employed to synthesize the WO3/ZnO structure by grinding WO3 NRs powder and ZnO MRs powder with various weight ratios (1:2, 1:1 and 2:1) together at room temperature without any surfactant and template. WO3 NRs were sprinkled on ZnO MRs surface and it was observed that the amount of WO3 significantly affected the overall surface of ZnO MRs. Furthermore, NH3 gas-sensing property of the obtained products were studied and compared with that of sole ZnO MRs sample. The results demonstrated that the sensors based on WO3/ZnO structures possessed larger response, better selectivity, faster response/recovery than the sensor based on pure ZnO MRs. Especially, the gas sensing property of the WO3/ZnO composite based sensor with weight ratio of 1:1 was superior to others. However, the operating temperature is quite high (400 C). The mechanism of gas sensing was also studied.

Sign in / Sign up

Export Citation Format

Share Document