ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Qingyao Wu,Mengmeng Zhu,Jingjing Cao,Xiao Wang,Yang Liu,Chensheng Xiang,Mingwang Shao,He Tian,Zhenhui Kang
Hydrogen can be used as a conventional clean energy resource, only by obtaining it in a cheap, simple, and feasible way. From the perspective of solar energy utilization, photocatalytic water splitting is essentially limited by high electric energy and intermittent solar energy. Here, we demonstrate that the carbon defects could decompose water directly by using low-value mechanical energy in the daily environment without using the sacrificial agent. The prepared metal-free carbon catalyst (OPC-900) with rich graphene topological defects shows several redox states in acetonitrile, which can accumulate redox equivalents and respond for overall water splitting in air at room pressure. Under stirring or light conditions, charges can be created and accumulated on the catalyst surface and split water into H2 and O2 in low conductivity medium. The mechanical energy conversion efficiency of stirring in ultrapure water is 7.01%. Our work combines visible light with low-value mechanical energy for widespread decomposition of water to produce hydrogen in air under normal pressure.
研究领域:
能源材料
·
催化
·
可再生能源
·
环境科学
✓ 已验证
DOI
高影响因子
Science Advances
·
2023
·Vol. 9
·期 7
·
IF 13.6
Zhe Zhang,Kuo Li,Shangchao Lin,Ruiqi Song,Dehong Yu,Yida Wang,Jingfan Wang,Shogo Kawaguchi,Zhao Zhang,Chenyang Yu,Xiaodong Li,Jie Chen,Lunhua He,Richard Mole,Bao Yuan,Qingyong Ren,Kun Qian,Zhuangli Cai,Jingui Yu,Mingchao Wang,Changying Zhao,Xin Tong,Zhidong Zhang,Bing Li
To harvest and reuse low-temperature waste heat, we propose and realize an emergent concept—barocaloric thermal batteries based on the large inverse barocaloric effect of ammonium thiocyanate (NH4SCN). Thermal charging is initialized upon pressurization through an order-to-disorder phase transition, and the discharging of 43 J g−1 takes place at depressurization, which is 11 times more than the input mechanical energy. The thermodynamic equilibrium nature of the pressure-restrained heat-carrying phase guarantees stable long-duration storage. The barocaloric thermal batteries reinforced by their solid microscopic mechanism are expected to substantially advance the ability to take advantage of waste heat.
研究领域:
能量存储
·
材料科学
·
热力学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Advances
·
2023
·Vol. 4
·期 23
·6092-6117
·
IF 5
Shadi Asgari,Ghodsi Mohammadi Ziarani,Alireza Badiei,Siavash Iravani
The emergence of piezocatalysts has led to advancements in catalyst design through the development of new technologies. Electron/hole piezocatalysis, a novel form of catalysis, utilizes piezoelectric materials that are stimulated by mechanical energy. This stimulation generates electrons and holes, which prove highly effective in promoting inefficient reactions, designing new reactions, and facilitating challenging chemical reactions and transformations. This review provides a concise historical account of electron/hole catalysis and the concept of piezoelectricity. Additionally, it explores various types of piezocatalysts, including piezoceramics (both lead-free and lead-based), piezopolymers, and piezocomposites. Notably, lead-free piezoceramics such as barium titanate and zinc oxide, as well as piezopolymers like polyvinylidene fluoride in β-phase and polyacrylonitrile in planar zigzag conformation, have gained significant recognition. The piezoelectric coefficient of polymers can be enhanced by adjusting the processing parameters and employing techniques such as blending, filler addition, stretching, and composite formation with piezo/non-piezo additives. Furthermore, piezoelectricity has been observed in unique materials such as ionic liquids, metal–organic frameworks, graphitic carbon nitride, black phosphorus, and MXenes. This review also presents recent research findings on the utilization of piezoelectric materials in various applications, including water splitting, water remediation, organic synthesis, and polymerization/crosslinking.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Chaozhong Sun,Xiaoying Guo,Rui Ji,Changzheng Hu,Laijun Liu,Liang Fang,Zhenxiang Cheng,Nengneng Luo
The triboelectric effect has recently demonstrated its great potential in environmental remediation and even new energy applications for triggering a number of catalytic reactions by utilizing trivial mechanical energy. In this study, Ba 4 Nd 2 Fe 2 Nb 8 O 30 (BNFN) submicron powders were used to degrade organic dyes via the tribocatalytic effect. Under the frictional excitation of three PTFE stirring rods in a 5 mg/L RhB dye solution, BNFN demonstrates a high tribocatalytic degradation efficiency of 97% in 2 h. Hydroxyl radicals (•OH) and superoxide radicals (•O 2 －) were also detected during the catalysis process, which proves that triboelectric energy stimulates BNFN to generate electron-hole pairs. The tribocatalysis of tungsten bronze BNFN submicron powders provides a novel and efficient method for the degradation of wastewater dye by utilizing trivial mechanical energy.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Pengcheng Li,Jun Wu,Zheng Wu,Yanmin Jia,Jiangping Ma,Wanping Chen,Luohong Zhang,Jie Yang,Yongsheng Liu
In the suspensions with the Ba 0.75 Sr 0.25 TiO 3 (BST) nanoparticles with an average size ~20 nm for triboelectric energy harvesting , dye decompositions were found to occur readily in the course of a normal stirring in dark at room temperature. More importantly, the decomposition efficiency can be greatly improved through some simple modifications in stirring rods and as high as 99.0% Rhodamine B can be decomposed in 3 h under a mild stirring of 300 rpm. Some well-designed experiments have been conducted, which show that the observed dye decompositions are directly related to the friction between BST nanoparticles and stirring rods in magnetic stirring. It is proposed that with the mechanical energy absorbed from friction, the BST nanoparticles have exerted a novel tribocatalytic effect for dye decompositions, which is confirmed by the detection of intermediate products of •OH and •O 2 − in stirring. These results clearly demonstrate that nanostructured oxides have the capability to harvest mechanical energy from ambient environment through friction for dye decomposition, which represents an important application for harvesting mechanical friction energy .
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Sun Jikai,Tu Rui,Xu Yuchun,Yang Hongyan,Yu Tie,Zhai Dong,Ci Xiuqin,Deng Weiqiao
The process of CH 4 cracking into H 2 and carbon has gained wide attention for hydrogen production. However, traditional catalysis methods suffer rapid deactivation due to severe carbon deposition. In this study, we discover that effective CH 4 cracking can be achieved at 450 °C over a Re/Ni single-atom alloy via ball milling. To explore single-atom alloy catalysis, we construct a library of 10,950 transition metal single-atom alloy surfaces and screen candidates based on C–H dissociation energy barriers predicted by a machine learning model. Experimental validation identifies Ir/Ni and Re/Ni as top performers. Notably, the non-noble metal Re/Ni achieves a hydrogen yield of 10.7 gH 2 gcat –1 h –1 with 99.9% selectivity and 7.75% CH 4 conversion at 450 °C, 1 atm. Here, we show the mechanical energy boosts CH 4 conversion clearly and sustained CH 4 cracking over 240 h is achieved, significantly surpassing other approaches in the literature.
研究领域:
催化化学
·
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2018
·
IF 6.653
Yawei Feng,Hao Li,Lili Ling,Sa Yan,Donglai Pan,Hao Ge,Hexing Li,Zhenfeng Bian
The introduction of a piezoelectric field has been proven a promising method to enhance photocatalytic activity by preventing photoelectron–hole recombination. However, the formation of a piezoelectric field requires additional mechanical force or high-frequency ultrasonic baths, which limits its potential application on industrial scale. Therefore, it is of great practical significance to design the catalyst that can harvest the discrete energy such as the fluid mechanical energy to form the electric field. Herein, PZT/TiO2 catalyst with a core–shell configuration was prepared by a simple coating method. By collecting the mechanical energy of water, an internal piezoelectric field was induced. Under 800 rpm stirring, transient photocurrent measured on PZT/TiO2 electrode is about 1.7 times higher than that of 400 rpm. Correspondingly, the photocatalytic degradation rate and mineralization efficiency of RhB, BPA, phenol, p-chlorophenol much improved, showing the promoting effect of piezoelectric field generated directly from harvesting the discrete fluid mechanical energy.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 56
·期 1
·902-912
·
IF 3.553
Li Bingya,Hu Xiaoran,Zhang Qian,Peng Xiaoli,Xiang Yong
In this study, we designed and fabricated a poling-free piezoelectric nanogenerator using bio-based polymer and filler, a poly( l -lactic acid) (PLLA)/vitamin B 2 (VB 2 ) composite film. The addition of VB 2 to PLLA led to improved crystallinity and enhanced the molecular orientation of PLLA, resulting in a significantly enhanced output performance of the PLLA/VB 2 nanogenerator. The proposed nanogenerator provides a maximum power density of 75.68 mW cm −3 , which is approximately 28.7 times higher than that of pure PLLA nanogenerator. Moreover, the PLLA/VB 2 nanogenerator exhibits good electrical responses under both mechanical and acoustic stimulations. The collected mechanical energy from the motion of human joints can power up several LEDs. The PLLA/VB 2 nanogenerator can sensitively detect sound frequency from 1 to 27 kHz. Thus, it has great application potential in ambient mechanical and acoustic energy harvesting, wearable devices, and human–machine controlling systems.
研究领域:
材料科学
·
能源技术
·
生物医学工程
✓ 已验证
DOI
高影响因子
Nano Energy
·
2021
·
IF 17.881
Xu Liu,Yizhi Liu,Tinghai Cheng,Yufei Gao,Zhiqiang Yang
Energy shortage has been the most serious problem for generations. With the continuous consumption of fossil energy, there is an urgent need to find a renewable and sustainable energy source. However, the mechanical energy is ubiquitous and adequate in daily life. With the development of nanotechnology, nanogenerators can utilize and convert mechanical energy into electric energy, which provides an effective solution in modern society. Besides, the combination of functional materials , the coupling mechanism between piezoelectricity and triboelectricity as well as other methods can improve the output properties of nanogenerators to a large extent. Hence, in this paper, the raw materials of polyvinylidene fluoridetrifluoroethylene (PVDF-TrFE), barium titanate (BTO) together with polydimethylsiloxane (PDMS) are innovatively mixed to obtain both outstanding piezoelectricity and flexibility. In addition, from the structural perspective, the lantern-shaped nanogenerator (LSNG) with large deformation rate up to 86% and tri-piezoelectric and single-triboelectric coupling mechanisms is well fabricated. The output voltage, current and power density can go up to 171.2 V, 107.6 μA and 0.6 mW/cm 2 , respectively. What’s more, the pressure sensitivity of the LSNG approaches 46.37 ± 0.5 mV N −1 (R 2 = 0.997) in the pressure ranging from 5 N to 25 N. The whole LSNG can maintain a stable electrical output even after 10,000 periodic operation cycles. Simulations were performed by using COMSOL and ANSYS in order to investigate the principle of the electricity generating and the relationship between strain and stress of the overall structure. Additionally, it can serve as a generator to light up several LED lights and collect mechanical energy from large deformations. Furthermore, it can serve as a sensor for detecting slight movements, mechanical position and realizing the patient positioning if integrated into the hospital floors. What’s more, it can convert mechanical energy into electrical energy from vehicles, bicycles, pedestrians, etc. in a large scale once they are placed under the pavements . In the future, this LSNG will play an important role in converting the vibration energy into electric energy. In the future, this LSNG will play an important role in converting the vibration energy into electric energy.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Chenyue Mao,Yi-Chi Zhang,Hua Lei,Xuchao Jia,Feng Chen,Wenqing Yao,Peitao Liu,Wanping Chen
Recently, tribo-catalysis has emerged as an appealing technology to harvest mechanical energy for environmental remediation. While most investigations have focused on catalyst optimization to enhance tribo-catalytic degradation, here we studied the effects of some metal disks placed on beaker bottoms (named coatings) on the tribo-catalytic degradation by BaTiO 3 (BTO) nanoparticles under magnetic stirring. For 20 mg/L Rhodamine B (RhB) solution, Cr, Cu, and Ti coatings improved the kinetic constants of BTO nanoparticles by 3.1, 3.4, 5.2 folds, respectively. Ti coating was further found to result in 99 % degradation in just 3 h for 50 mg/L RhB solution, and elevate the kinetic constants by 19.1 and 16.6 folds for 20 mg/L methyl orange (MO) and 20 mg/L methylene blue (MB) solutions, respectively. EPR, FL and UV–vis spectroscopy verified that modifying vessel bottom with Ti coating enabled BTO nanoparticles to generate more active species. First-principles calculations of the work functions of Cr, Cu, and Ti surfaces, and the energy-band structure of BTO revealed a decreased electron-hole recombination rate due to the transfer of excited electrons to metallic coatings. These results suggest that modifying vessel bottoms with suitable metallic coatings is a simple, eco-friendly and efficient strategy to boost tribo-catalysis for environmental remediation.
研究领域:
环境科学
·
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Li Chen,Fan-di Meng,Fu-hui Wang,Li Liu
Organic coatings are one of the most widely used methods for metal protection. However, traditional organic coatings fail to meet the demands for mechanical energy relief under harsh marine conditions characterized by fluid shear and pressure. To address this challenge, a biomimetic strategy is proposed to introduce a slipable functional side chain into the epoxy backbone, mimicking the mechanism of tentacle movement in sea anemones. This innovative design endows the 2-ureido-4-pyrimidone (UPy)-grafted epoxy coating with exceptional mechanical energy dissipation capabilities. An in-depth investigation into the relationship between the molecular structure and properties revealed that the enhancement originates from a unique architecture that mimics the slip mechanism of sea anemones. This structure features chain-sliding motion at the molecular level and the dynamic exchange of hydrogen bond cross-linking sites. This mechanism efficiently dissipates mechanical energy within the three-dimensional crosslinked network of the coating, thereby significantly enhancing its anti-corrosion performance. This research offers a novel strategy for developing mechanical energy relief coatings and shows promise for the practical application of dynamic bond chemistry theory in creating multifunctional coatings for deep-sea equipment.
研究领域:
材料科学
·
海洋工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 21
·9014-9026
·
IF 3.553
Hu Xiaoran,Hu Ying,Guo Zhen,Liu Shuai,Zhang Qian,Zhang Xiaokun,Xiang Yong
In this paper, a direct alternating current hybrid generator is proposed through the combination of piezoelectric hydroxyapatite (HA)/polylactide (PLLA) composite film with a graphene/silicon dynamic Schottky diode. The proposed hybrid generator provides an overall energy conversion efficiency of 65% under a single mechanical force. This percentage marks the highest efficiency compared with previously reported piezoelectric generators and dynamic Schottky diode generators. The primary mechanisms of the proposed generator are the built-in electric field separation of the diffusion of carriers in the moving Schottky diode, and the synergistic effect of the hydrogen bond and dipole interactions between HA and PLLA for the direct and alternating part of the proposed HA/PLLA/graphene/silicon hybrid generator, respectively. Moreover, the hybrid generator provides a maximum output voltage of 4.7 V for the alternating output and current of 2.9 μA for the direct output, which can simultaneously illuminate several LEDs. Thus, the proposed generator shows great potential in practical applications for converting mechanical energy for self-powered systems or wearable energy sources.
研究领域:
材料科学
·
能源技术
·
生物医学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）