ChemNanoMat
·
2019
·Vol. 5
·期 11
·1408-1417
·
IF 3.431
Qiqi Sun,Qi Liu,Lei Gong,Chiming Wang,Xia Kong,Chaoyi Yang,Weigang Feng,Dongdong Qi,Fangna Dai,Xiyou Li,Yanli Chen
Graphical Moisture-resistant : Remarkably specific sensors for NO 2 have been developed based on hierarchical self-assembly of porphyrin devices. They are effective sensors over a broad humidity range. A metal free meso -tetrakis(1-pyrenyl)porphyrin H 2 T[(Pyr) 4 ]P ( 1 ) and its cobalt congener CoT[(Pyr) 4 ]P ( 2 ) are firstly fabricated into the hierarchical nanopetals and micro-ball-flowers, respectively, by a simple solution-based method. Unexpectedly highly sensitive, stable, selective and reproducible responses to 50–400 ppb NO 2 gas are obtained at room temperature for the aggregates of both 1 and 2 , within 2 min dynamic exposure period at a broad relative humidity (RH) range of 0%-75%. In particular, the micro-ball-flowers of 2 achieve a sensitivity of 91.4 and 214% ppm −1 at 45% RH and 75% RH, respectively, demonstrating the potentials as chemical sensors operating in real-world atmospheres. Furthermore, the sensitivity of 1 and 2 remains almost unchanged under 0%–75% RH after 6 months. The present work represents one of the best results among organic-based ppb-level NO 2 sensors operating under a broad RH range in terms of sensitivity and stability to humidity variations at room temperature.
研究领域:
材料科学
·
化学传感
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 22
·2211617
·
IF 29.4
Yiqian Zhao,Na Yang,Xu Chu,Fuchang Sun,Muhammad Umair Ali,Yuan Zhang,Biao Yang,Yulu Cai,Manyu Liu,Nicola Gasparini,Jiaxin Zheng,Chaohong Zhang,Chuanfei Guo,Hong Meng
Hydrogels have entered the spotlight for applications in soft electronics. It is essential and challenging to obtain hydrogels that can function properly under varying environmental circumstances, that is, 30–90% relative humidity (RH) and −20 to 40 °C due to their intrinsic nature to lose and absorb water upon variations in humidity and temperature. In this work, a green solvent, solketal, is introduced into poly 3-dimethyl-2-(2-methylprop-2-enoyloxy)ethyl azaniumyl propane-1-sulfonate (poly(DMAPS)) zwitterionic hydrogels. Compared to glycerol, solketal endows hydrogels with greater possibility for further modification as well as improved water content and mechanical performance consistency over 30–90% RH. Encouragingly, the optimized hydrogel demonstrates its unique merits as a dielectric layer in iontronic sensors, featuring non-leaky ions, high sensitivity (1100 kPa −1 ), wide humidity, and temperature range applicability. A wide-humidity range healable and stretchable electrode is attained by combining the hydrogel substrate with Ag paste. A full-device healable and highly-sensitive sensor is developed. This study is a pioneering work that tackles the broad humidity range applicability issue of hydrogels, and demonstrates the ion-leakage-free ionic skins with zwitterionic dielectrics. The outcomes of the study will considerably promote advancements in the fields of hydrogel electronics and iontronic sensors.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy & Environmental Science
·
2025
·
IF 30.8
Wenna Ge,Quanmao Wei,Wenzong Li,Xu Wang,Chenguang Lu,Keke Zhang,Xuanqi Luo,Lemin Zhang,Yu Sun,Yahua Liu
Harvesting ubiquitous water energy through hydrovoltaic technology offers a promising avenue for clean energy and has attracted significant interest. However, current hydrovoltaic systems are plagued by their reliance on a single form of water, which limits their current density to below 5 μA cm–2 when humidity deviates from the optimal level. Here we present a dual-mode water-driven electricity generator (DWEG) that utilizes amorphous slurry to harvest energy from both moisture and liquid water through absorption and evaporation modes, respectively. Leveraging the efficient ion diffusion driven by water gradients at high humidity and the hydration free-energy difference at low relative humidity, this design achieves a current density above 144 μA cm–2 across 5 to 90% relative humidity, and maintains a voltage of 0.7 V for over 420 hours at 90% relative humidity. We demonstrate that DWEG arrays can be readily scaled up to directly power desk lamps for more than five days, or even charge a tablet computer with an aluminum electrode. This work opens a route towards efficient energy harvesting from multiple forms of water energy under all-weather conditions.
研究领域:
能源技术
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2024
·
IF 10.8
Jiami Ma,Weihong Guo,Cheng Ni,Xiaoping Chen,Weihao Li,Juan Zheng,Wei Chen,Zhu Luo,Jinlong Wang,Yanbing Guo
Ground-level ozone (O3) pollution has emerged as a significant concern due to its detrimental effects on human health and the ecosystem. Catalytic removal of O3 has proven to be the most efficient and cost-effective method. However, its practical application faces substantial challenges, particularly in relation to its effectiveness across the entire humidity range. Herein, we proposed a novel strategy termed “dual active sites” by employing graphitized carbon-loaded core–shell cobalt catalysts (Co@Co3O4-C). Co@Co3O4-C was synthesized via the pyrolysis of a Co-organic ligand as the precursor. By utilizing this approach, we achieved a nearly constant 100% working efficiency of the Co@Co3O4-C catalyst for catalyzing O3 decomposition across the entire humidity range. Physicochemical characterization coupled with density functional theory calculations elucidates that the presence of encapsulated metallic Co nanoparticles enhances the reactivity of the cobalt oxide capping layer. Additionally, the interface carbon atom, strongly influenced by adjacent metallic Co nuclei, functions as a secondary active site for the decomposition of O3 decomposition. The utilization of dual active sites effectively mitigates the competitive adsorption of H2O molecules, thus isolating them for adsorption in the cobalt oxide capping layer. This optimized configuration allows for the decomposition of O3 without interference from moisture. Furthermore, O3 decomposition monolithic catalysts were synthesized using a material extrusion-based three-dimensional (3D) printing technology, which demonstrated a low pressure drop and exceptional mechanical strength. This work provides a “dual active site” strategy for the O3 decomposition reaction, realizing O3 catalytic decomposition over the entire humidity range.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ping Guo,Xuyang An,Xinxin He,Yinhua Hu,Jia Zhang
NO 2 is a prevalent atmospheric pollutant known to cause significant harm to both the environment and human health. In practical applications, the development of NO 2 sensors capable of functioning over a wide humidity range with high sensitivity and stability is crucial. Here, the Pt-decoration multi-scale three-dimensional Bi 2 S 3 nanoflower structure assembled by one-dimensional nanorods and two-dimensional reticulated nanomeshes was constructed by integrating the geometrical and electronic effects. The Pt/Bi 2 S 3 based sensors exhibit a high response of 3.92 and rapid response/recovery times of 15 s/136 s to 1 ppm NO 2 at room temperature. Furthermore, the Pt/Bi 2 S 3 based sensors show excellent selectivity and stability across a wide range of humidity levels (10 %-90 %RH). Finally, a portable NO 2 detector was designed for data acquisition and wireless transmission to enable real-time gas detection and hazard warning. Our study presents a multi-scale structure for sensitive materials design and practical application of high-performance NO 2 sensors operated in a wide humidity range at room temperature.
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
JOURNAL OF MATERIALS RESEARCH
·
2020
·
IF 2.502
Kai Huang,Qi Cheng,Honglei Zhang,Ligang Lin,Qiying Wang
A simple and effective strategy is proposed for fabricating honeycomb-patterned ethyl cellulose (EC) films via a combination of the dip-coating and breath figure methods under a wide humidity range (40–90%). A mixture of toluene and methanol as a volatile solvent/nonsolvent pair was used to effectively control the surface morphology. Additionally, honeycomb patterns were successfully formed via dip-coating under a low humidity (relative humidity less than 40%), when water was directly added into the mixed solution. The important factors that influenced the morphology of EC honeycomb-patterned films were investigated, such as the humidity, solution concentration, and the withdrawal speed during dip-coating. The pore sizes could be controlled by changing the film-formation conditions. Water contact angle enables a transition from hydrophilic to hydrophobic. The possible mechanisms of honeycomb pattern formation are discussed. The fabrication of an ordered honeycomb-patterned film in a cost-effective and convenient manner will have broad application potential in the future.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
IEEE ELECTRON DEVICE LETTERS
·
2024
·Vol. 45
·期 4
·685-688
·
IF 4.1
Yaping Song,Zhiyan Ma,Yanyu Cui,Xiaoya Miao,Yunlong Yu,Ke Wu,Hongran Zhao,Sen Liu,Teng Fei,Tong Zhang
In this work, the polymeric ionic liquid (PIL)/ polybenzimidazole (PBI) composites (PIL/PBIs) based humidity sensors were prepared. The humidity sensing properties of the sensors were controlled by the ratio of PIL and PBI in the sensing films, and the optimized sensor performs a high response of 988.1 in the low humidity range (2%−35% RH). The introduction of PBI into sensing film can guarantee the stability of the humidity sensors. The as-prepared sensor can be utilized to detect the moisture in lubricating oil.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Yunlong Yu,Wei Zhang,Yaping Song,Yanyu Cui,Sen Liu,Xishuang Liang,Teng Fei,Tong Zhang
In recent years, poly(ionic liquid)s (PILs) have attracted much attention for the application in humidity sensors. However, the ionic conductivity of PILs is inhibited in the low humidity range. In this work, discontinuous conductive template was prepared using a hydrophobic conductive polymer PEDOT:F, and PILs was prepared in situ on the conductive template (PFCT&PILs) to obtain a low humidity sensor. The prepared PFCT&PILs sensor has much lower impedance value, higher response and smaller detection limit than the pure PILs sensor. The PFCT&PILs sensor shows a high response of 208, with a small hysteresis of 0.5 % RH and has small impedance value in 5 %–35 % RH. The humidity sensitive principle of PFCT&PILs sensor has been discussed.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2025
·
IF 10.9
Xinyu Zhou,Yaohui Feng,Lurong Ge,Zixuan Su,Tianshu Ge
Desiccant coated heat exchanger (DCHE) is a promising and energy-efficient dehumidification unit, which uses cooling source to overcome sorption heat effect. Recently, metal–organic framework (MOF) is emerging in this filed due to its S-shaped isotherms, leading to reduced requirements for regeneration temperature differences. However, this unique characteristic of MOF also means that each adsorbent can only function under conditions where the relative humidity (RH) is limited, and adsorbents with high stepwise relative humidity are difficult to function under low humidity conditions. This work proposes a two-stage MOF-coated heat exchanger (MCHE), where the first stage utilizes MOFs that operate under high RH, while the second stage employs adsorbents capable of functioning at low RH, aiming to achieve efficient cascade dehumidification over a wide humidity range. MIL-101(Cr) and Al-fumarate were respectively selected for the first and second stages for experimental verification. The influence mechanisms of key parameters such as switching period, cooling/hot water temperatures, and air conditions were investigated. Compared with the single stage configuration, the two-stage MCHE in this work exhibits better heat and mass transfer performance, achieving a lower supply air temperature (2–3 °C lower) and a higher dehumidification efficiency (10 % higher). This study verifies the feasibility and applicability of the proposed system, providing a new approach for efficient dehumidification under wide humidity range.
研究领域:
化学工程
·
能源科学
·
环境工程
·
材料科学
·
热力学
·
传热传质
·
功能材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Lianqin Wang,Jie Yao,Yabiao Pei,Weikang Zhu,Zhizhao Che,Junfeng Zhang,Yan Yin,Michael D. Guiver
Microporous layers play a crucial role as one of the main components of the membrane electrode assembly (MEA) in facilitating effective water management for proton exchange membrane fuel cells (PEMFCs), which is vital for maintaining optimal performance in a wide humidity range . Herein, Zn-based zeolitic imidazolate framework-8 (ZIF-8)-derived material (ZDM) as a porous carbon material is first developed to construct the microporous layer (MPL). With higher gas permeability , improved water management, and increased electrical conductivity , the MPL equipped with a ZDM layer, denoted as MPL-Z, exhibits superior performance, surpassing commercial MPLs throughout the range of 30–100% relative humidity (RH). The peak power density of an H 2 /air PEMFC at 70% RH utilizing a MPL-Z is 3.3 times that of commercial MPL. Furthermore, a unique patterned dual MPL is designed to boost the performance, ultimately achieving a peak power density of 1.50 W cm −2 (H 2 /air) with a low total Pt loading of 0.3 mg Pt cm −2 at 100 % RH. Even at only 30% RH, the peak power density can reach 0.72 W cm −2 (H 2 /air). The results demonstrate that the material and structural design of the MPL allows for the efficient operation of low Pt loading PEMFCs over a wide humidity range.
研究领域:
电化学
·
能源材料
·
纳米结构材料
·
燃料电池技术
·
界面工程
✓ 已验证
DOI
高影响因子
Small
·
2025
·
IF 12.1
Yong Zhang,Jiahao Fang,Xulei Lu,Peng Duan,Chunqiao Fu,Yinpeng Huang,Chenxing Wang,Qi-Chang He,Tingting Yang
Moisture-based power generation technology captures energy from moisture and can directly power small electronic devices. Effectively utilizing atmospheric water at a wide humidity range and converting it into electrical output at the same level is valuable. However, most devices significantly differ in power generation performance between high and low humidity environments, so the dynamic adaptability of wide humidity remains a major challenge for existing moisture-based power generators. Here, a biomimetic intelligent nanofluid diode is designed with a polypyrrole (PPy)/anodized aluminum oxide (AAO)/poly (diallyldimethylammonium chloride) (PDDA) sandwich structure, which can dynamically adjust the surface charge and pore size of the nanochannel according to external humidity, achieving dynamic adaptive regulation of moisture capture and ion rectification transport behavior. The ability of moisture capturing and the rectification effect both increase with decreasing humidity. Thus, the number and migration efficiency of free charge carriers are improved under low humidity conditions, and the maximum difference in output power remains within 40% (26.3–44 mW m −2 ) in a wide humidity range (15% –93% RH). The humidity-adaptive properties of membranes enable devices to operate over a wide range of moisture, providing a new approach to enhance the adaptability of nanogenerators to complex environments.
研究领域:
能量转换
·
纳米技术
·
材料科学
·
环境工程
·
智能材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）