IONICS
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2024
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IF 2.4
Liu Sen,Li Xiumei,Sun Xiannian,Sun Yin,Huang Naibao
To improve the electrochemical performance of cobalt tungstate (CoWO 4 ) to serves as electrode materials for supercapacitors, a facile microwave-assisted hydrothermal method was developed, which successfully anchored highly dispersed CoWO 4 nanoparticles on carbon nanotubes (CNTs). The as-prepared CoWO 4 /CNT composites has much smaller particle size of CoWO 4 nanoparticles with enhanced conductivity due to the addition of CNTs. As a result, the as-prepared CoWO 4 /CNT showed a high-specific capacity (842.0 C·g −1 at a current density of 1 A·g −1 and 506.0 C·g −1 at 10 A·g −1 ), a wide potential window (0.90 V), and exceptional cycling stability of reverse capacity growth (maximum retention of 322.9% after 4651 cycles and 254.4% after 20,000 cycles at 30 A·g −1 ). The outstanding performance is attributed to the well dispersion of nano-sized CoWO 4 particles, favorable orientation, the presence of oxygen vacancies, and the heterogeneous interface with CNTs. The results suggest that CoWO 4 /CNT composites are highly promising as electrode materials for next-generation supercapacitors.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Keyu Tao,Huamei Dan,Yang Hai,Li Liu,Yun Gong
Even though transition metal phosphides (TMPs) have been regarded as very promising catalysts for hydrogen evolution reaction (HER), exploring highly reactive TMPs-based catalysts with reliable stability in alkaline media remains an enormous challenge. Herein, using wafer-like Co(CO 3 ) 0.5 (OH)·0.11H 2 O as template followed by anion-exchange and further phosphorization process, it is synthesized a three-dimensional (3D) hierarchical porous heterostructure with highly dispersed ultrafine metallic Co 2 P nanoparticles uniformly anchored on porous conductive CoWO 4 nanofiber matrix, which not only promotes the electron transfer, but also avoids the deterioration of phosphide. In addition, the electron densities re-distribution within the heterostructure also contributes to the improved catalytic activity. Furthermore, the doping of W into Co 2 P gives proper H adsorption free energy ΔG H . Impressively, the Co 2 P/CoWO 4 /Ni foam (NF) exhibits an overpotential of 81 mV at −10 mA cm −2 and a Tafel slop of 47 mV dec −1 along with supreme long-term durability at −40 mA cm −2 . The present work also demonstrates different dosages of Na 2 WO 4 in the anion-exchange step will lead to different phase compositions and morphologies, giving rise to different HER electrocatalytic performances of the phosphorized samples.
研究领域:
材料科学
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电化学
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催化反应
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DOI
高影响因子
ACS Applied Nano Materials
·
2024
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IF 5.3
Junlong Zhang,Jie Wei,Jianting Li,Minchuan Xiahou,Zehao Sun,Ao Cao,Youxin Yuanfeng,Guogang Chen,Yongqiang Chen
In recent times, the fabrication of Z-scheme heterostructures has gained popularity as an effective strategy for developing composite catalysts with photogenerated carriers that possess high redox capacity. This study introduces a novel type of direct Z-scheme heterojunction photocatalysts known as ZnS quantum dots wrapped around CoWO4 nanoparticles (ZnS-QDs@CoWO4). The results of the experiments and analysis indicate that these heterojunction photocatalysts demonstrate superior degradation of tetracycline hydrochloride in wastewater compared with individual ZnS-QDs or CoWO4. Notably, the 30ZS-CWO catalyst, with a mass ratio of 30:1 between ZnS-QDs and CoWO4, exhibited the highest photocatalytic reaction rate constant (k = 0.03427 min–1), which is 3.5 times greater than that of ZnS-QDs (k = 0.00969 min–1) and 214 times higher than that of CoWO4 (k = 0.00016 min–1). The enhanced photocatalytic performance can be attributed to two main factors. First, the use of CoWO4 nanoparticles as carriers helps in better dispersing the ZnS quantum dots, leading to increased catalytic reaction sites. Second, the formation of Z-scheme heterojunctions in the composite photocatalysts significantly boosts the redox capability of the photogenerated carriers. Furthermore, the excellent stability and recyclability of ZnS-QDs@CoWO4 heterojunction photocatalysts were validated through five-cycle experiments. This research introduces a promising approach for developing QDs-based Z-scheme photocatalysts for highly effective environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2024
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IF 2.8
Xueying Wang,Qian Ma,Yi Wang,Lingyu Li,Dongheng Zhao,Huayushuo Zhang,Bolong Li
Bimetallic MOFs-derived hierarchical WO 3 /ZnWO 4 /CoWO 4 heterostructures were prepared by electrospinning for achieving superior n-butanol-sensing property at low operating temperatures. Porous chain-like structures can gradually transformed into porous mulberry-like structures composed of various accumulated particles as increasing the additive amount of Zn/Co-ZIFs. High selectivity and stability of WO 3 -based composites to 100 ppm n-butanol can be observed at 25 °C, including the large sensitivity of 32 and the fast response/recovery times of 115/179 s. The enhanced gas-sensing performance is primarily ascribed to the increased specific surface area, plentiful polyoxometalate, and effective heterojunctions, obviously promoting surface/interface absorption behavior and electron transport process.
研究领域:
材料科学
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传感器技术
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纳米技术
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DOI
高影响因子
Materials
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2025
·Vol. 18
·期 18
·4401
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IF 3.2
Jianxu Zhang,Jingwei Li,Weisheng Guan
Biomass reforming under mild conditions for synergistic hydrogen production, driven by renewable solar energy, has rapidly emerged as a promising strategy that not only enables the efficient reutilization of biomass but also facilitates the generation of high-purity hydrogen. In this work, ZnCdS (ZCS) nanoparticles and CoWO4(CW) nanocrystals were assembled via a solvothermal method to construct a ZCS/CW S-type heterojunction composite. The resultant materials’ physicochemical characteristics were methodically described. With lignin model compounds (PP-ol) and sodium lignosulfonate as substrates, the ZnCdS/CoWO4-10% catalyst demonstrated a significant generation of hydrogen activity, producing hydrogen at rates of 223.30 μmol·g−1·h−1and 140.28 μmol·g−1·h−1, respectively, according to experimental results. The formation of heterojunctions endows composite photocatalysts with higher hydrogen evolution rates compared to single-component catalysts. This is attributed to energy band bending at the interface of the heterojunction, which facilitates efficient charge separation while maintaining strong redox capabilities. High-value compounds like phenol and acetophenone were formed when the oxidation products in the post-reaction lignin model compound solution were subsequently analyzed using high-performance liquid chromatography. Additionally, a convincing mechanism for the catalytic reaction was suggested. It is expected that this study will offer a viable route for the creation of effective photocatalytic materials, high-value organic waste transformation, and sustainable hydrogen production.
研究领域:
材料科学
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能源化学
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环境催化
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可持续能源
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光催化转化
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Shikun Song,Xi Tong,Jie Tan,Jingjing Xu,Mindong Chen,Li Sun
In this study, CoWO 4 /CeO 2 composites were synthesized by a hydrothermal method and used as activated peroxymonosulfate (PMS) catalysts for the degradation of antibiotic sulfadiazine (SDZ). The synthesized composites underwent systematic characterization on the synthesized composites to investigate the effects of Co: Ce atomic ratio, initial pH, PMS dosage, inorganic anions and other factors on the degradation performance. The results showed that 5 mg/L of SDZ could be degraded basically completely (99.8 % degradation rate) in 20 min by CWC-2/PMS system. Moreover, the degradation rate of SDZ was still more than 82 % after the composite was reused four times. The free radical quenching experiments and EPR tests confirm the redox potential difference between Co 3+ /Co 2+ and Ce 4+ /Ce 3+ was utilized for bimetallic cycling. And it could activate PMS to mainly produce SO 4 − • and O 2 − • radicals efficiently. Thus SDZ could be degraded effectively in this system.
研究领域:
环境科学
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化学工程
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材料科学
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水处理技术
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催化
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DOI
高影响因子
Advanced Healthcare Materials
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2023
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IF 10
Zhuoran Yang,Chunyu Yang,Dan Yang,Ye Zhang,Qingzhu Yang,Fengyu Qu,Wei Guo
Ferroptosis has recently attracted much attention as an anti-tumor therapy. Evidence suggests that ferroptosis can induce oxidative stress and accumulation of lethal lipid peroxides in cancer cells, leading to cell damage. However, unsuitable pH, H 2 O 2 levels, and high glutathione (GSH) expression in the tumor microenvironment hinder the development of ferroptosis-mediated therapy. In this study, an l -arginine ( l -arg)-modified CoWO 4 /FeWO 4 (CFW) S-scheme heterojunction is strategically designed and constructed for ultrasound (US)-triggered sonodynamic- and gas therapy-induced ferroptosis. CFW not only has excellent Fenton-catalytic activity, outstanding GSH consumption capacity, and excellent ability to overcome tumor hypoxia, but its S-scheme heterostructure can also avoid the rapid combination of electron (e) and hole (h + ) pairs, thereby enhancing the sonodynamic effects. As a precursor of nitric oxide (NO), l -arg is modified on the surface of CFW (CFW@ l -arg) to achieve controlled NO release under US irradiation, thereby enhancing ferroptosis. In addition, poly(allylamine hydrochloride) is further modified on the surface of CFW@ l -arg to stabilize l -arg and achieve controllable NO release. Both in vitro and in vivo results demonstrate that such a multifunctional therapeutic nanoplatform can achieve high therapeutic efficacy through sonodynamic and gas therapy-enhanced ferroptosis. This designed oncotherapy nanoplatform provides new inspiration for ferroptosis-mediated therapy.
研究领域:
癌症治疗
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纳米技术
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材料科学
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肿瘤学
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生物医学工程
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DOI
PubMed
高影响因子
Advanced Science
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2024
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IF 14.3
Zhuoran Yang,Zhuo Li,Chunyu Yang,Li Meng,Wei Guo,Liqiang Jing
Cuproptosis offers a promising and selective therapeutic strategy for cancer therapy. To fully realize its potential, the development of novel cuproptosis therapeutic agents and the achievement of efficient copper release are critical steps forward. Herein, closely-contacted Cu 2 O-CoWO 4 nanosheet heterojunctions (CCW-NH) are successfully synthesized using an in-situ process for cuproptosis therapy. The efficient release of copper ions from CCW-NH can be triggered by ultrasound irradiation, primarily due to the generation of superoxide radicals as the sonodynamic agents via the Z-scheme charge transfer mechanism. When subjected to the combined effects of ultrasound and laser irradiation, the effective release of copper ions is increased by 1.7 times compared to the untreated group, significantly enhancing the efficiency of cuproptosis. And the incorporation of CCW-NH and L-arginine into the temperature-sensitive injectable hydrogel (HP-CCW@LA) ultimately achieved a tumor inhibition rate of up to 95.1%. L-arginine, serving as a reducing agent, enabled the sustained release of highly active Cu + during treatment. Notably, after treating tumors with HP-CCW@LA, the tumor microenvironment is leveraged to promote copper ion conversion, which offers the potential for monitoring tumor therapy efficacy through magnetic resonance imaging. This work offers a novel integrated strategy for the development of new cuproptosis agents and therapeutic evaluation.
研究领域:
癌症治疗
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纳米技术
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材料科学
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医学成像
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DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Xinyan Wang,Yuting Zhang,Jian Zhang,Chengpeng Shao,Jiaxing Yang,Yuning Zhang,Ruoyi Li,Zheng Xing
In this study, a Z-type heterojunction photocatalyst CoWO 4 /CS/BiOCl-10 was constructed by hydrothermal synthesis for the efficient removal of norfloxacin (NOR) contaminants in water. X-ray photoelectron spectroscopy (XPS) combined with Fourier transform infrared spectroscopy (FT-IR) confirmed that the hydroxyl group in the chitosan (CS) molecule was bonded with the oxygen atom on the surface of CoWO 4 through hydrogen bonding to form a directional charge transport channel, which greatly improved the photocatalytic degradation efficiency of CoWO 4 /CS/BiOCl-10, and the degradation rate was as high as 98.30 % within 90 min under 300 W xenon lamp irradiation. Optoelectronic measurements show that the interfacial potential difference drives electrons to migrate along the Z-path. Density functional theory (DFT) and liquid chromatography-mass spectrometry (LC-MS) were used to identify intermediates in the NOR degradation process, revealing the degradation pathway of NOR through piperazine ring cleavage and defluorination. The kinetics of NOR degradation intermediates were revealed using two-dimensional correlation spectroscopy (2DCOS) techniques. Rice seed germination experiments have shown that the degraded NOR solution is virtually non-toxic, greatly reducing the environmental impact. This study provides a new strategy for the development of efficient photocatalytic systems through the synergistic regulation mechanism of hydrogen bonding and heterojunction.
研究领域:
环境科学
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材料科学
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光催化
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水处理
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化学工程
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光谱学
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毒理学
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Jie Wei,Zhiting Liu,Zehao Sun,Yunpeng Li,Chunfang Wu,Lin Zhao
Recently, the composite photocatalysts coupled with upconversion materials have received widespread attention due to higher utilization efficiency of solar energy in a wide-spectrum range. Novel heterojunction photocatalysts of CoWO 4 @NaYF 4 :Yb 3+ ,Er 3+ were designed and developed herein. The structural characterization, morphology and elemental composition analysis demonstrated that heterojunctions between CoWO 4 and NaYF 4 :Yb 3+ ,Er 3+ were indeed formed in the composite photocatalysts. Moreover, CoWO 4 @NaYF 4 :Yb 3+ ,Er 3+ heterojunction photocatalysts exhibited higher pollutants degradation efficiency. Especially, a great enhancement of +87% on the photocatalytic activity was achieved in the heterojunction photocatalyst of 60CoWO 4 –NaYF 4 :Yb 3+ ,Er 3+ compared with pure CoWO 4 . The dominant radicals generated from the heterojunction photocatalysts were confirmed as the photo-generated holes ( h + ) and hydroxyl radicals (⋅OH) through the radical species trapping experiments and fluorescence detection, which is fully in line with the expected band structure characteristics of CoWO 4 . Eventually, an underlying mechanism was proposed that the enhanced photocatalytic activity should be attributed to the wide-spectrum responsive features of CoWO 4 @NaYF 4 :Yb 3+ ,Er 3+ heterojunction photocatalysts. Within the heterostructures, CoWO 4 photocatalyst can absorb both the UV–Vis light due to its narrow bandgap and the Near-Infrared energy through the upconversion NaYF 4 :Yb 3+ ,Er 3+ , thereby utilizing solar energy more efficiently in a wide-spectrum range for photocatalytic reactions.
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
DESALINATION
·
2026
·
IF 9.9
Xing Jiang,Xinli Li,Congming Tang
H 2 /Ar etching created O/S vacancies at CWO/CIS interface, narrowing bandgap for full-spectrum absorption. • H 2 /Ar etching enhanced photothermal conversion via non-radiative recombination, channeling charge relaxation to heat. • CWO/CIS-H 2 Ar aerogel achieves 2.29 kg m −2 h −1 , 88.9% efficiency at 1 sun, outperforming single and unetched composites. • This evaporator shows excellent photothermal conversion and strong potential for wastewater treatment. Solar-driven interfacial evaporation represents a green technology for efficient photothermal conversion and wastewater treatment. In this work, we propose a novel dual-defect engineering strategy coupled with heterojunction construction to design a solar evaporator. Specifically, a CoWO 4 /CdIn 2 S 4 (CWO/CIS) heterojunction was first fabricated via a hydrothermal method, followed by controlled H₂/Ar etching at 600 °C for 3 h to simultaneously introduce oxygen and sulfur vacancies. The resulting defect-rich heterojunction was then integrated with sodium alginate to construct a three-dimensional porous aerogel evaporation system. H 2 /Ar etching introduced dual vacancies on the material surface, which synergistically narrowed the bandgap (from 2.02 eV to 1.90 eV) and broadened the full-spectrum light absorption range. More importantly, the etching process optimized the heterojunction interfacial contact by creating defect-mediated charge transfer channels, thereby significantly promoting photogenerated carrier separation and migration while suppressing electron-hole recombination, a key advantage over conventional heterojunction designs. These combined effects substantially enhanced the photothermal conversion efficiency. Under one sun irradiation, the optimized CWO/CIS-H 2 /Ar-aerogel achieved an evaporation rate of 2.29 kg m −2 h −1 in pure water with a corresponding photothermal conversion efficiency of 88.9%, substantially outperforming both the individual components and the non-etched composite. The evaporator demonstrated stable evaporation performance across diverse water matrices, including seawater, river water, heavy metal-ion wastewater, and tetracycline-contaminated water. Notably, it effectively removed heavy metal ions and organic pollutants such as tetracycline, rhodamine B (RhB), and methyl orange (MO). This work provides a novel defect-heterojunction synergistic strategy for developing high-performance solar-driven water evaporation systems, offering new insights into the rational design of photothermal materials with tailored electronic structures for water purification applications. Download: Download high-res image (160KB) Download: Download full-size image
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高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Ramzi Nasser,Hao Zhou,Amira Ben Gouider Trabelsi,Fatemah Homoud AlKallas,Habib Elhouichet,Ji-Ming Song
Designing hybrid composites electrodes with hierarchical nano-structural features and superb electrochemical performances sites is vital factor for engineering advanced supercapacitors . Herein, a novel nanocomposite from CoWO 4 nanodots anchored on olive derived activated carbon doped with N and S (OACNS) is successfully prepared via an in-situ hydrothermal process. The well dispersion of the CoWO 4 nanodots (pseudo-capacitor type) with ca. 7 nm in diameter on the OACNS nanosheets prevents their agglomerations to build hierarchical porous structure with high surface area (162.8 cm 2 ·g −1 ) and various pores sizes distribution. Noteworthy, through the synergistic effect , the composite shows superb capacitance value of 152 mAh·g −1 (0.5 A·g −1 ) and splendid life cycle of 93.5 % (via 12,000 cycles). Interestingly, an asymmetric CoWO 4 @OACNS//OACNS hybrid supercapacitor provides excellent specific energy (53.6 Wh·kg −1 ) at maximum specific power of 650 W·kg −1 . Such fascinating electrochemical performance indicates that the proposed CoWO 4 @OACNS hybrid composite can be exploited as cathode for next generation of energy storage devices.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）