RARE METALS
·
2026
·Vol. 45
·期 7
·e70439
·
IF 12.1
Jinyong Hu,Songming Dou,Xinyao Liu,Bohao Liu,Xiongxiong Xue,Yong Zhang
en This link goes to a English section zh This link goes to a Chinese section Light-activated gas sensors hold significant potential in environmental monitoring and smart Internet of Things (IoT) owing to their advantage in room temperature operation. Nevertheless, due to a narrow light absorption range, high photocarrier recombination rate, and weak redox activity of the sensing material, the performance enhancement of the current light-activated gas sensors is still impeded. Herein, a full-spectrum solar light–activated gas sensor is designed based on W 18 O 49 /Ag 2 S nanocomposites with an S-scheme heterostructure for the highly sensitive detection of NO 2 at room temperature. Under solar light illumination, the gas sensor exhibits a high response of 430.84% to 1 ppm NO 2 , which is over 11 times higher than that based on pristine W 18 O 49 or Ag 2 S components. Moreover, the sensor demonstrates excellent repeatability fast response/recovery times (5/3 s), low limit of detection (50 ppb), high selectivity, and satisfactory long-term stability. The enhanced sensing performance might arise from the broadened light-harvesting capability and the unique charge carrier transfer mechanism in the S-scheme heterostructure. A Bluetooth-enabled portable monitoring system is further developed to achieve real-time NO 2 monitoring and wireless visualization. This work provides theoretical insights and experimental validation for the effectiveness of S-scheme heterostructure in enhancing room-temperature gas-sensing performance, demonstrating the prospective application potential for IoT-related environmental monitoring. 摘要 en This link goes to a English section zh This link goes to a Chinese section 光激活气体传感器因其室温工作的优势 , 在环境监测和智能物联网 领域具有重要潜力。然而 , 由于传感材料的光吸收范围窄、光生载流子复合速率高以及氧化还原活性较弱 , 目前光激活气体传感器的性能提升仍受到阻碍。本研究设计了一种基于W 18 O 49 /Ag 2 S纳米复合材料的全光谱太阳光激活气体传感器 , 该材料具有S型异质结构 , 可在室温下高灵敏检测NO 2 。在太阳光照射下 , 该气体传感器对1 ppm NO 2 的响应高达430.84% , 是纯W 18 O 49 或Ag 2 S组分的11倍以上。此外 , 该传感器展现出优异的可重复性、快速的响应/恢复时间 ( 5/3 s ) 、低检测限 ( 50 ppb ) 、高选择性以及令人满意的长期稳定性。 理论分析表明传感性能的增益源于S型异质结构中拓宽的光捕获能力和独特的载流子传输机制。在此基础上, 进一步开发了一套蓝牙便携式监测系统 , 实现了NO 2 的实时监测和无线可视化。本研究为S型异质结构有效增强气体传感性能提供了理论指导 和实验验证 , 为发展面向物联网应用的高灵敏室温气体传感器提供了重要技术支撑。
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2025
·
IF 9.8
Xin Qu,Ce Wang,Yuanyu Zhao,Jinqiu Ye,Ping Hu,Rui Zhao,Yong Liu
Human activities, ranging from medical applications to space exploration, face significant threats from multiband electromagnetic radiation. This challenge is particularly pronounced in the complex radiation environments of space. There is an urgent need for high-efficiency, stable broadband electromagnetic shielding materials to safeguard human health and equipment safety. Herein, a Bi-modified W 18 O 49 /MWCNTs/PAN hybrid nanofiber membrane is successfully prepared by electrospinning and post-treatment. Relying on the synergistic effect of Bi, W 18 O 49 , MWCNTs, and porous structures, excellent broadband radiation protection capability is achieved: (i) Low near-infrared-visible-light (NIR-VIS) transmittance (0.62 %); (ii) Ultraviolet (UV) transmittance of only 0.012 % and UPF value as high as 2000; (iii) Mass attenuation coefficient up to 16.18 cm 2 g −1 and attenuation ratio of 85.74 % (thickness: 4 mm) at 33 keV X-ray energy. Furthermore, porous structure and high specific surface area give the membrane ultralight density (0.36 g cm −3 ), flexibility, and outstanding air permeability (8.5 kg m −2 d −1 ). Even after 2000 bends, it still maintains stable structure and performance. Meanwhile, low thermal conductivity (42.2 mW m −1 K −1 ) and superior temperature resistance (300 °C) enable it to adapt to complex and changing environments. These advantages make the membrane highly promising for radiation protection in medical, industrial, and aerospace applications.
研究领域:
材料科学
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辐射防护
·
生物医学工程
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DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Weiwei Tie,Surjya Sarathi Bhattacharyya,Tianci Ma,Shuangyi Yuan,Minghan Chen,Weiwei He,Seung Hee Lee
Building Z-scheme heterostructure integrating oxygen vacancies seems to effectively encourage photoexcited charge partition and hence photoelectric response and photocatalytic performance. Here, through the inclusion of carbon quantum dots (CQDs) with W 18 O 49 /BiOBr (WB) for enhancing electron exchange and band structure control, we have developed one Z-scheme ternary CQD/W 18 O 49 /BiOBr heterostructures (CWB) with intense oxygen vacancies. The optimal CWB heterostructure shows superior photocatalytic and photoelectric response execution. The findings indicate that CWB has higher photocatalytic degradation efficiency of tetracycline hydrochloride (TC) at 97 % compared to WB or W 18 O 49 alone. Additionally, the CWB shows a higher photocurrent density, surpassing WB and W 18 O 49 by 2.5 times and 5.4 times. A potential self-supplied photoelectrochemical-type photodetector utilizing CWB displays relatively quick and stable photoelectric response at 0 V. The improved photo-electric performance are linked to the combined impact of separation and redistribution of charges caused by Z-scheme heterostructure and oxygen vacancies, as well as intensive light absorbance by localized surface plasmon resonance. Our research also validates significance of CQDs as cocatalyst in accelerating the splitting of photo carriers in Z-scheme ternary CWB heterostructures, which will stimulate interest in creating advanced photoactive heterojunction substance with carbon nanomaterials.
研究领域:
材料科学
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环境科学
·
光催化
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Ping Li,Zhihua Zhuang,Ziwei Zhang,Jinhan Guo,Zhongying Fang,Wei Chen
Photocatalytic degradation of organic dyes by sunlight can greatly simplify the catalytic devices and save the cost. The development of photocatalysts for organic pollutants degradation driven by sunlight at room temperature still faces serious challenges. In this work, we developed a novel Pd-W 18 O 49 nanowire photocatalyst for high efficiency, high stability, and sunlight-induced degradation of methylene blue and neutral red. It was found that after Pd introducing, the band gap energy of W 18 O 49 nanowires lowers from 2.77 to 2.44 eV, which can accelerate the electron jump from the valence band to the conduction band, resulting in the efficient separation of electrons and holes. Meanwhile, with Pd introducing to the W 18 O 49 nanowires, interfacial heterojunction with the Schottky barrier is formed, which can reduce the rate of electron-hole recombination. The catalytic results show that the obtained Pd-W 18 O 49 nanowires demonstrate enhanced photodegradation capacity in comparison with W 18 O 49 nanowires. Especially, with Pd-W 18 O 49 nanowires (10 mg) as photocatalyst, 98.4% of methylene blue and 96.1% of neutral red can be decomposed within 40 min under sunlight irradiation. Besides, the photocatalytic degradation pathways of methylene blue and neutral red on the Pd-W 18 O 49 nanowires are also proposed. This study provides a good strategy for the design and preparation of highly efficient 1D heterojunction-based photocatalysts for the degradation of environmental organic pollutants.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2015
·Vol. 25
·期 47
·7280-7290
·
IF 11.805
Kerong Deng,Zhiyao Hou,Xiaoran Deng,Piaoping Yang,Chunxia Li,Jun Lin
A novel nanoplatform based on tungsten oxide (W 18 O 49 , WO) and indocyanine green (ICG) for dual-modal photothermal therapy (PTT) and photodynamic therapy (PDT) has been successfully constructed. In this design, the hierarchical unique nanorod-bundled W 18 O 49 nanostructures play roles in being not only as an efficient photothermal agent for PTT but also as a potential nanovehicle for ICG molecules via electrostatic adsorption after modified with trimethylammonium groups on their surface. It is found that the ability of ICG to produce cytotoxic reactive oxygen species for PDT is well maintained after being attached on the WO, thus the as-obtained WO@ICG can achieve a synergistic effect of combined PTT and PDT under single 808 nm near-infrared (NIR) laser excitation. Notably, compared with PTT or PDT alone, the enhanced HeLa cells lethality of the 808 nm laser triggered dual-modal therapy is observed. The in vivo animal experiments have shown that WO@ICG has effective solid tumor ablation effect with 808 nm NIR light irradiation, revealing the potential of these nanocomposites as a NIR-mediated dual-modal therapeutic platform for cancer treatment.
研究领域:
生物医学工程
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肿瘤学
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高影响因子
Science China-Technological Sciences
·
2023
·Vol. 66
·期 12
·3585-3595
·
IF 4.6
Tian GuangMing,Wang Bo,He XinHai,Wang Chen,Yang Dong,Ma JianHua
The spatially controllable shape-shifting behaviors of a planar two-dimensional (2D) film to three-dimensional (3D) shapes upon external stimuli are of paramount significance for the development of smart materials. Herein, the present work focuses on fabricating plain film whose shape can be remotely and spatially transformed into various 3D configurations via the formation of a laser-induced temperature gradient; when subjected to laser irradiation, the prestretched hybrid films exhibit out-of-plane bending behavior owing to anisotropic chain relaxation and strain energy release. On this basis, various sophisticated shape transformations can be achieved by site-specific irradiations of laser with a controllable magnitude. Meanwhile, shape morphing involving reversible bending transformations can also be realized by employing the laser on the corresponding opposite side of the hybrid films. Remarkably, under a 160 mW/cm 2 simulated sunlight illumination, the transformation of flat 2D film into 3D chiral actuators is driven by material anisotropy and geometrical heterogeneity of a bilayer strip design, and it yields right and left-handed helix, the morphologies of the helix shape can be precisely tailored by the strip angles and strain values.
研究领域:
材料科学
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光学工程
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智能材料
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lulu Zhang,Rui Li,Luyao Cui,Zijun Sun,Lijun Guo,Xiaochao Zhang,Yunfang Wang,Yawen Wang,Zhuobin Yu,Tao Lei,Xuan Jian,Xiaoming Gao,Caimei Fan,Jianxin Liu
Synergistic water activation and nitrogen reduction process is significant to the photocatalytic ammonia synthesis reaction, in which the obtainment of active hydrogen (H*) from H 2 O dissociation and then transfer to N 2 activation site is essential. Herein, the oxygen vacancies (OVs) enhanced hydrogen spillover is used to increase the H* transfer between the H 2 O activation site (Ru) and the N 2 activation site (OVs-rich W 18 O 49 ). Results shown that the OVs-rich Ru/W 18 O 49 achieves high activity for NH 3 production with a yield of 222.75 µmol‧g −1 ‧h −1 , which is 5.60 folds of the OVs-deficient Ru/W 18 O 49 . Control experiments, characterization, and theoretical calculation made it clear that OVs played crucial roles in enhancing the hydrogen spillover by modifying the support's Gibbs free energy for hydrogen adsorption and lowering the barrier of H* migration. Finally, the detail mechanism was explained from a new perspective. This strategy may provide new insights for other hydrogenation reactions under mild conditions.
研究领域:
材料科学
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催化化学
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
·
IF 19.503
Zhenfei Yang,Xinnian Xia,Wenwu Yang,Longlu wang,Yutang Liu
The molecular oxygen activation (MOA) process tends to be the rate-limiting step for photocatalytic selective organic transformation such as aromatic alcohol oxidation . Herein, using the plasmonic 0D/2D W 18 O 49 /ZnIn 2 S 4 (WOZ) heterojunctions as a model system, we firstly shed light on the ultra-efficient MOA origin of the synergism of photothermal effect and continuous hot electrons injection through both experimental and DFT calculations. This synergistic action not only enhances the generation rate of •O 2 ¯ and reduces the activation energy barrier, but also significantly increases the adsorption of the O 2 and activates it more easily, thus achieving efficient photocatalytic selective oxidation of benzyl alcohol to benzaldehyde. Meanwhile, the charge separation and transfer processes involved in O 2 activation can be further optimized with the Z-scheme transfer route. This work would provide an exciting opportunity to construct more active photothermal catalysts with ultra-high efficiency of MOA for a wide variety of organic transformations with solar energy.
研究领域:
催化化学
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材料科学
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理论计算
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高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2023
·Vol. 63
·期 12
·4274-4284
·
IF 3.2
Guangming Tian,Jie Zhang,Mingcai Li,Xin Zhang,Dong Yang,Shuguang Zheng
The remotely controlled shape memory behaviors of a two-dimensional (2D) sheet to controlled helix structure upon external stimuli is of great significance in the field of smart materials. Herein, we devise a strategy to fabricate a series of shape memory polycaprolactone/W 18 O 49 nanowire film via highly efficient UV-triggered thiol-acrylate click chemistry. The resultant polymer composites exhibited desirable photothermal transfer efficiency and can enable rapid temperature increase over the melting temperature of polymeric matrix, thus remotely actuating shape transformation within 8 s. Owing to the well-defined architecture of the polymer network, the fabricated elastic composite film exhibited a high degree of crystallinity and showed excellent shape memory properties with R f of 93.12% and R r of 95.32%. Remarkably, under a 160 mW/cm 2 simulated sunlight illumination, the transformation of flat 2D film into 3D chiral actuators is driven by designing anisotropic bilayer thin sheet, and it yields right- and left-handed helix. This work will pave the way for designing biomimetic flexible actuators toward multifunctional shape-shifting devices. Highlights Shape memory polycaprolactone/W 18 O 49 nanowires composite film is fabricated via UV-triggered thiol-ene click chemistry. Polymer composites exhibit light-activated shape memory behaviors. The composite films show excellent shape fixity and shape recovery ratio based on the well-defined network. The shape morphing behaviors of a flexible 2D bilayer strip into 3D chiral actuators are achieved.
研究领域:
材料科学
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纳米技术
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智能材料
·
聚合物化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）