INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Liya Fan,Jaka Sunarso,Xiao Zhang,Xianqiang Xiong,Li He,Lixia Luo,Fangling Wang,Ziwei Fan,Chenglin Wu,Deman Han,Ngie Hing Wong,Yong Wang,Guihua Chen,Wei Chen
The electrocatalyst coupling with CuWO 4 has resulted in a comparable or worse performance when compared to the bare CuWO 4 . This work attempts to address this challenge by coupling CuWO 4 with NiWO 4 electrocatalyst that can form a Type-II heterojunction with a suitable energy-level alignment allowing for effective hole transfer from CuWO 4 to NiWO 4 electrocatalyst. We applied thermal annealing to the WO 3 nanoplates by adding Cu(NO 3 ) 2 and Ni(NO 3 ) 2 precursors to obtain the CuWO 4 /NiWO 4 composite with common anions. A high surface-to-volume ratio, perfect interface lattice match, suitable energy level alignment, and high electrocatalytic activity were exhibited in the composite. These characteristics led to a 100 mV negative shift on the onset potential compared to the pure CuWO 4 photoanode. Moreover, it featured a 0.7-fold higher photocurrent density than that of the pure CuWO 4 photoanode. Only 9% of photocurrent density decreased after 4 h of photo-irradiation, demonstrating excellent photostability. Our mechanism study demonstrated that NiWO 4 could act as a semiconductor to form a Type-II heterojunction with CuWO 4 , promoting hole transfer from the CuWO 4 valence band to the NiWO 4 . Meanwhile, the NiWO 4 effectively injects the separated holes into the water solution as a promising electrocatalyst, thus enhancing the overall water splitting performance. This work provides an important design consideration by focusing on the corrected level alignment and lattice match for developing the CuWO 4 /electrocatalyst system to work effectively.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
Surfaces and Interfaces
·
2022
·
IF 6.137
Kezhong Wu,Zejin Wang,Hui Zhao,Bei Ruan,FeiFei Nie,Rufen Chen,Mingxing Wu
The development of transition metal compounds (TMCs) and conductive polymers composite catalysts substitute for the traditional scarce Pt-based catalysts of counter electrodes (CEs) has been recognized as one of the distinguishing paths to enhance power conversion efficiency (PCE) and decrease manufacturing costs of dye-sensitized solar cells (DSSCs). At present, various thin film preparations have been developed and applied to prepare assortment CEs. Herein, both polyaniline (PANI) and CuWO 4 film were prepared, and further to fabricate layer-by-layer composite CEs of CuWO 4 /PANI, PANI/CuWO 4 , CuWO 4 /PANI/CuWO 4 , PANI/CuWO 4 /PANI, aiming to promote the charge transfer capability and thus improve catalytic activity. And then, PANI, CuWO 4 and four composite layered CEs obtained PCE values of 5.14, 5.64, 5.96, 6.21, 4.96 and 4.24% toward the regeneration of I 3 − /I − redox couples in the assembled DSSCs, respectively. Particularly, the fascinating performance of the bilayer PANI/CuWO 4 CEs inherits the excellent electrical conductivity and the abundant porous structure of PANI skeletons for effective electrolyte diffusion. Meanwhile, the CuWO 4 layer was coupled to the layers of PANI by thermal activation annealing treatment to furnish rich inner active sites for the regeneration of I 3 − /I − couples. Benefit from the synergistic effects of PANI and CuWO 4 , the as-prepared PANI/CuWO 4 CEs manifests the highest PCE of 6.21%, indicating an inspiring strategy by the layered assembly Pt-free CEs with the cost effective and high-performance as an alternative Pt-based catalyst for DSSC.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 38
·385401
·
IF 2.9
Zili Ma,Yanjun Yin,Ye Jiang,Weihao Luo,Jinyu Xu,Yan Chen,Zhiyong Bao,Chaozhong Guo,Jun Lv
Ternary-phase CuWO4 oxide with an electronic band gap of 2.2–2.4 eV is a potential candidate photoanode material for photoelectrochemical (PEC) water splitting. Herein, we present an efficient method to prepare CuWO4 film photoanode by combining hydrothermal method and hybrid microwave annealing (HMA) process. In comparison with conventional thermal annealing (CTA), HMA can achieve CuWO4 thin film within minutes by using SiC susceptor. When the CuWO4 photoanode is prepared by HMA, its PEC water oxidation performance improves from 0.21 to 0.29 mA cm−2 at 1.23 VRHE comparing with the one prepared by CTA. The origin of the enhanced photocurrent was investigated by means of complementary physical characterizations and PEC methods. The results demonstrated that the obtained HMA processed CuWO4 photoanode not only exhibited intrinsic porous nanostructures but also abundant surface hydroxyl groups, which facilitated sufficient mass transport and the charge transfer. Our results highlight the application of HMA for the fast fabrication of porous film photo-electrodes without using sacrificial template.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Bingchen Li,Huanshun Yin,Yunlei Zhou,Minghui Wang,Jun Wang,Shiyun Ai
MicroRNAs play a crucial role in regulating plant growth, such as involving in the pathways of phytohormons signaling, which function in broad range of important aspects in many stages of plant development and evolution. To figure out the components part of microRNA in phytohormone signaling network, a sensitive photoelectrochemical biosensor was developed to detect miRNA-319a specifically using CuO-CuWO 4 as photoactive material and in situ generation electron donor technique. Taking the advantage of rolling circle amplification, nicking endonuclease triggered exponential amplification of target molecule, specific interaction between phosphate group and phos-tag and between biotin and avidin, the developed strategy can greatly amplify the detection signal only using trace amount of target miRNA-319a. The wide linear range was obtained from 1 fM to 0.1 nM and the detection limit was estimated to be 0.47 fM (S/N = 3). The developed method also showed good detection specificity. The effect of five phytohormones on the expression level of miRNA-319a in rice leaves was also investigated. This will be a basal principle of investigating the signaling network of phytohormones.
研究领域:
生物化学
·
分子生物学
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分析化学
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植物科学
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Tao-Long Wu,Peng-Fei Qiu,Xiu-Niang Tan,Manlin Chen,Chenchen Wang,Yan Zhou,Zai-Yin Huang
Hierarchical core-shell hetero-arrays with well-controlled morphology, rational combination of hybrid electrochemical active materials are regarded as promising candidate electrodes for supercapacitors due to their excellent redox activity and electrical conductivity. However, their inferior rate performance and poor long-term cycling stability hinder their practical applications and still of great challenge. In this work, three hierarchical core-shell CuTCNQ@MWO 4 /CF ( TCNQ = 7,7,8,8-Tetracyanoquinonedimethane; M = Cu, Co and Ni ) hetero-arrays on Cu foam with different morphology are successfully constructed by in situ conductive metal-organic framework templated synthetic route of an inter-facial growth and a hydrothermal synthesis process. The crystallinity of MWO 4 decorated on the conductive CuTCNQ nanoarrays plays important role in their electrochemical performances. Especially, the hierarchical tree-like CuTCNQ@CuWO 4 /CF hetero-arrays electrode can be used as high-performance positive electrode materials for supercapacitor, which exhibits excellent electrochemical properties with a high area capacitance (1073.3 mF/cm 2 at 1 mA/cm 2 ), excellent rate capability, low resistances and outstanding cycling stability with capacitance retention of 88.6% at 30 mA/cm 2 after 10000 cycles. What's more, the CuTCNQ@CuWO 4 //AC ASC device delivers a high energy density of 0.075 mW h/cm 2 (45 W h/kg) at a power density of 0.8 mW/cm 2 (480 W/kg) and still achieves a energy density of 0.053 mW h/cm 2 (32.1 W h/kg) at a power density of 4.00 mW/cm 2 (2424 W/kg). Thus, this work demonstrates that a rational and effective strategy is explored to prepare hierarchical hetero-arrays with different morphology from conductive MOF-templated for high-performance energy storage in practical application.
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
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Dechao Wu,Mengzhu Jiang,Ting Li,Kuan Peng,Yonghong Wang,Yaohui Wu,Yelin Zeng
The effective removal of tetracycline (TC) from aquatic environments remains a critical challenge due to its persistence and ecological risks. In this study, a novel magnetic photocatalyst (MCB) was synthesized by loading Fe 3 O 4 and CuWO 4 onto biochar, aiming to integrate adsorption enrichment with Z-scheme visible-light photocatalysis. The biochar (BC) framework exhibited a high specific surface area (117.70 m 2 g −1 ), enabling efficient TC capture with an adsorption rate of 81.19 % and a Langmuir-derived maximum capacity of 225.28 mg g −1 at 35 °C. Kinetic modeling revealed a pseudo-second-order chemisorption mechanism, while thermodynamic analysis confirmed that the adsorption process was spontaneous and endothermic. The Z-scheme heterojunction formed between CuWO 4 and Fe 3 O 4 effectively promoted photogenerated charge carrier separation and enhanced redox potential, facilitating the production of reactive species. The incorporation of BC introduces additional electron transfer-active sites, thereby markedly enhancing the charge transport rate. Electron spin resonance and scavenger experiments verified h + , •OH and •O 2 − as the dominant oxidative agents. As a result, 0.6-MCB achieved a total TC removal efficiency of 92.83 % and a TOC removal rate of 85.57 %, indicating strong mineralization performance. After five cycles, it maintained 79.45 % removal efficiency, demonstrating good recyclability and structural stability. Toxicity analysis demonstrated that the degradation process significantly reduces both the toxicity and teratogenicity of TC and its intermediates, thereby underscoring the environmental safety and practical applicability of 0.6-MCB. This work provides a promising material platform for sustainable antibiotic removal in wastewater treatment.
研究领域:
环境科学
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化学工程
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材料科学
·
水处理技术
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yanru Chen,Lingling Zhao,Xiuming Wu,Yuming Dong,Guang-Li Wang
This study addresses the demand for high–performance aptasensing by reporting a spontaneously formed nanozyme on the surface of CuWO 4 nanomaterials . The self–coordination of [Fe(CN) 6 ] 3- with CuWO 4 nanomaterials led to the in situ formation of CuHCF on its surface, which demonstrated efficient peroxidase–like activity for the catalytic oxidation of the chromogenic substrate of 3,3′,5,5′-tetramethylbenzidine (TMB). This spontaneously formed nanozyme enabled its coupling with the stimuli–responsive mesoporous silica nanoparticles (MSN) molecule gates and the nuclease (DNase I) cleavage reaction assisted target recycling for achieving colorimetric aptasensing in label–free, immobilization–free, and highly amplified modes. The developed approach allowed the detection of 0.1–100 nM kanamycin (KANA) with the low detection limit of 3.5 pM, which could also satisfactorily identify the content of KANA in treated milk and lake water samples. The formed nanozyme may in principle be universally applicable for the detection of a range of targets of interest. We hope this spontaneously formed nanozyme would arouse the exploration of more ingenious nanozyme with exquisite biosensing applications.
研究领域:
纳米技术
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分析化学
·
生物传感器
·
材料科学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Qing Huang,Ruixian Bi,Yalai Cen,Chendong Ling,Wenfeng Zhuge,Jinyun Peng,Cuijie Nong,Cuizhong Zhang,Qiongfang Zhou
This experiment constructed a heterostructure composite material of copper tungstate and molybdenum disulfide (CuWO 4 @MoS 2 ) through an interfacial regulation strategy. The samples were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Based on CuWO 4 @MoS 2 heterojunction materials, electrochemical sensors were constructed for the detection of o-aminophenol (OAP). Research has indicated that interface regulation CuWO 4 @MoS 2 it can effectively improve electron transfer ability, enhance structural stability, and thus improve electrochemical activity. Under optimal conditions, differential pulse voltammetry (DPV) was used to detect OAP in the concentration range of 0.3–14.8 μM and 14.8–74.1 μM, and the electrochemical response peak current showed two linear segments, namely, Ip (μA) = 7.27 × 10 −2 C (μM) - 1.76 × 10 −2 (R 2 = 0.9983) and Ip (μA) = 2.40 × 10 −2 C (μM) + 0.7 (R 2 = 0.9904). This method achieved a detection limit as low as 0.027 μM. The actual sample of OAP was detected using the spiked recovery method, and the recovery rate was measured to be 98.00% - 100.00%, with favorable results. In summary, the electrochemical sensor constructed in this experiment has easy operation, low cost, anti-interference, and reliable stability and can be used for rapid detection of OAP in river water.
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2022
·Vol. 40
·期 22
·2701-2711
·
IF 5.56
Shuangyan Meng,Li Li,Hui Xi,Jing Yang,Ting Xiao,Rui Zuo,Xueqing Xu,Ziqiang Lei,Zhiwang Yang,Qunji Xue
Comprehensive Summary A series of nickel-doped copper tungstate/oxygen-rich TiO 2 heterojunction-constructed composites of x Ni-CuWO 4 /OTiO 2 were successfully prepared to demonstrate the enhancement of the visible-light photoactivity through promoting the photogenerated charge carrier separation efficiency. Of all these composites, 0.2Ni-CuWO 4 /OTiO 2 exhibits excellent and stable visible light photoactivity for the photooxidative coupling of benzylamine to the corresponding N -benzyl-1-phenymethanimine (BPMI) in air atmosphere. The conversion of benzylamine and the selectivity to BPMI reach 97% and 99%, respectively. The catalyst shows good cyclability with the conversion of benzylamine decreasing just by 22% after being repeated six times with the well-maintained selectivity of BPMI. The composite also exhibits excellent photo-bactericidal ability, which greatly inhibits the reproducing of both the Gram-positive bacteria ( e.g ., S. epidermidis ) and Gram-negative bacteria ( e.g ., E. coli ).
研究领域:
材料科学
·
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Xianqiang Xiong,Liya Fan,Guihua Chen,Yong Wang,Chenglin Wu,Dan Chen,Yan Lin,Tianding Li,Shuai Fu,Shibin Ren
In this work, we have reported the integration of the nickel phosphate (Ni-Pi) nanoparticles on the surface of CuWO 4 photoanodes for the first time, which exhibited a significant enhancement in the photocurrent and improvement in the incident photon to current efficiency (IPCE) towards the water splitting reaction under simulated sunlight irradiation. The CuWO 4 photoanode was synthesized via a solid phase reaction method using WO 3 nanoplates as the sacrificial template, followed by surface modification of Ni-Pi through a drop-casting technique. The CuWO 4 photoanode retained its excellent photostability after the surface modification with Ni-Pi. Time-resolved photoluminescence spectra revealed that the charge recombination dynamics of the CuWO 4 photoanodes was greatly inhibited upon the loading of Ni-Pi nanoparticles . The electrochemical impedance spectra confirmed the efficient charge separation and enhanced interfacial charge transfer over the Ni-Pi-modified CuWO 4 photoanodes. Thus, a significant decrease of charge recombination and a favourable photohole transfer could be the main reason underlying the remarkable performance of developed composite photoanodes, where Ni species of Ni-Pi entrapped the holes to facilitate the water oxidation kinetics .
研究领域:
材料科学
·
物理化学
·
能源化学
·
光催化
·
电化学
✓ 已验证
DOI
高影响因子
CATALYSIS TODAY
·
2018
·
IF 4.667
Dawang Chu,Chen Zhao
The effective and selective conversion of cellulose to valuable fuels and chemicals is highly attractive. In this paper, we prepared a catalyst with the adjacent surface Cu° and oxygen-deficient WO x (2 < x < 3) species by reduction of CuWO 4 precursor, and such catalyst coupled with Ni/activated carbon (AC) attained high yield (71 wt%) and good cycling performances in catalyzing one-step hydrothermal conversion of cellulose to ethylene glycol (EG), highly superior to the performances on physically mixed Ni/C, Cu/C and WO 3 . The increased Cu doping amounts led to a higher ratio of the lower valence state W (V or IV) to the high valence W(VI) as indicated by XPS, XRD, and TPR-H 2 analyses. The oxygen vacancies on the hydrogen-reduced CuWO 4 sample dramatically increased, probably due to the benefits from the substantial dissociated H• on the neighboring Cu° center. The EG yields from cellulose are shown to be proportional to the concentrations of oxygen vacancies on WO x , which catalyzes the important elementary retro-aldol step reaction via adsorbing C 6 sugar intermediates in a specific way. It is inferred that Cu introduction is mainly used to create more oxygen vacancies on the WO x surface that helps adsorbing oxygenates, while Ni fast hydrogenates of hydroxyacetaldehyde to EG and avoids coking, constructing a multi-functional synergistic catalytic process from converting of cellulose to EG in the high-temperature water
研究领域:
催化化学
·
生物质转化
·
绿色化学
·
材料化学
·
能源化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jia-Sheng Li,Li-Fang Cai,Hao-Nan Chen,Hua-Dong Dong,Xuan-Yu Yang,Li-Juan Yue,Fei-Long Gong,Ke-Feng Xie,Yong-Hui Zhang
A Cu 2+ -regulated one-step hydrothermal route simultaneously tailors the dimension and facet exposure of WO 3 nanostructures. • In-situ atomically coherent WO 3 /CuWO 4 p-n heterointerfaces stabilize Cu + as highly active oxygen-activation centers. • Cu + /Cu 2+ redox-coupled oxygen activation and H 2 S dissociation enable high response, fast kinetics, and robust selectivity. Precise control over crystal morphology and interfacial electronic structure is pivotal for advancing gas sensing performance, yet simultaneously optimizing these parameters remains a formidable challenge. Herein, we report a one-step hydrothermal strategy that orchestrates the dimensional evolution of WO 3 -based nanomaterials from high-aspect-ratio nanorods to ultrathin nanosheets by simply tuning Cu 2+ concentration. This morphological transformation is driven by a synergistic mechanism involving competitive citrate coordination and facet-selective adsorption of Cu 2+ ions. Crucially, this in-situ growth protocol constructs atomically coherent WO 3 /CuWO 4 p-n heterojunctions that uniquely stabilize a high density of metastable Cu + species. These Cu + centers act as potent electron donors, dramatically enriching surface-active superoxide radicals (O 2 − ) and lowering the activation energy for gas reactions. The optimized Cu-WO 3 -1 sensor exhibits exceptional performance toward hydrogen sulfide (H 2 S), the sensor exhibits a relatively high response (R a /R g = 218.2 at 50 ppm, 150 °C), ultrafast response/recovery kinetics (13 s/101 s), and remarkable selectivity against interfering gases. Mechanistic studies reveal that the superior performance stems from a dual-function Cu + /Cu 2+ redox cycle: Cu + facilitates efficient H S bond dissociation and oxygen activation, while the reversible formation of conductive CuS and subsequent surface regeneration ensure rapid signal recovery. This work establishes a universal paradigm for synchronizing facet engineering with valence-state modulation to design next-generation high-performance chemiresistive sensors. Employing a one-step Cu 2+ -modulated hydrothermal strategy, we simultaneously achieved dimensional control of WO 3 -based nanostructures and constructed atomically coherent WO 3 /CuWO 4 p–n heterojunctions. This approach successfully stabilized a high density of metastable Cu + species, significantly enriched surface-active superoxide radicals (O 2 − ), and lowered the activation energy for gas reactions. The Cu-WO 3 -1 composite enabled ultrasensitive H 2 S detection, exhibiting a high response of 218.2 toward 50 ppm H₂S at 150 °C, along with rapid response (13 s) and recovery (101 s) kinetics. The outstanding performance originates from a bifunctional Cu + /Cu 2+ redox cycle: Cu + facilitates efficient H S bond cleavage and oxygen activation, while the reversible formation of conductive CuS and the subsequent surface regeneration ensure rapid signal recovery. Download: Download high-res image (259KB) Download: Download full-size image
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DOI
高影响因子
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