ELECTROCHIMICA ACTA
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2024
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IF 5.5
Xusen Cheng,Yanping Wang,Yunfeng Qiu,Yanxia Wang,Miao Yu,Zhuo Ma,Tiedong Sun,Shaoqin Liu
Metal oxides rich in oxygen vacancies (O v ) possess excellent intrinsic conductivity, variable valence metal center and high capacitance, which were potential candidates as microbial fuel cells anode. However, their high bacterial toxicity greatly hindered the activity of biofilm. To solve this issue, in this work, polydopamine (PDA) covered capacitive O v doped Co 3 O 4 nanosheets were designed and successfully grown on carbon cloth (CC). The introduction of O v significantly promoted the charge storage, the net charge and the accumulated charge were 217.1 and 2680.3 C/m 2 , respectively, surpassed Co 3 O 4 anode without O v . In addition, O v also decreased the charge-transfer resistance ( R ct ), effectively accelerating EET. The R ct of PDA/O v -Co 3 O 4 @CC was 29.51 Ω, lower than CC (382.10 Ω). The cover of PDA prevented the direct contact between metal ions and microorganisms, greatly enhanced the bacterial viability. The power density of MFCs with PDA/O v -Co 3 O 4 @CC anode was 2.77 W/m 2 , 1.45 times higher than that of bare CC (1.90 W/m 2 ). In addition, PDA/O v -Co 3 O 4 @CC anode displayed excellent coulombic efficiency and daily COD removal amount (23.5 % and 147.6 mg/L/d), higher than the control groups. The community analysis showed the abundance of Geobacter on PDA/O v -Co 3 O 4 @CC anode was 91 %, higher than other anodes. Present study developed a facile and effective PDA coating strategy to simultaneously enhance the biocompatibility and capacitance of O v -rich metal oxides, which will be a promising method for the preparation of high performance MFCs anode.
研究领域:
材料科学
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环境工程
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电化学
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微生物学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Zhuo Zeng,Xiaoming Li,Qi Yang,Dongbo Wang,Abing Duan,Shuaijun Pan,Jiangfu Zheng
In advanced oxidation processes (AOPs) based on peroxynitrite (PMS), generating reactive radicals efficiently and consistently is challenging due to high electron occupancy and slow conversion rates of PMS. In this study, ultrathin In 2 O 3 with oxygen vacancies (Ov) was combined with ultrathin ZnAl-LDH to construct S-scheme In 2 O 3 -Ov/ZnAl-LDH-Ov heterojunctions. The presence of Ov promotes the formation of charge-transfer channels (Al-O-In bonding) at the interface of these heterojunctions, thereby reducing electron occupancy and enhancing the generation of active radicals in the InLDH/PMS/Vis system. This S-scheme heterojunction facilitates the acceleration of photogenerated electrons, leading to the rapid conversion of PMS into hydroxyl (•OH) and sulfate radicals (SO 4 - •), and promotes swift electron transfer. Consequently, the InLDH/PMS/Vis system demonstrates exceptional degradation efficiency for a wide range of organic pollutants and a high removal capacity in treating real industrial wastewater. This investigation offers a novel perspective on the coordination mechanisms between photocatalysis and PMS activation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ACS ES&T Water
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2022
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IF 0
Guangyao Zhai,Shaozhi Liu,Shenghe Si,Yuanyuan Liu,Honggang Zhang,Yuyin Mao,Minghui Zhang,Zeyan Wang,Hefeng Cheng,Peng Wang,Zhaoke Zheng,Ying Dai,Baibiao Huang
Phenolic molecules are a kind of toxic organic pollutants commonly discharged from industrial effluents. Catalytic ozonation holds great potential in removing phenolic pollutants and further improving the removal efficiency is still the research focus of this field. In this study, defect engineering was used to construct Bi2O3 with rich oxygen vacancies (denoted as Ov-Bi2O3). Ov-Bi2O3 was found to exhibit efficient activity toward the removal of phenolic derivatives. Combined DFT calculations and experimental results suggest that oxygen vacancies play two important roles: (1) the exposed Bi sites induced by rich oxygen vacancies endow a special bridging O3 adsorption, which is beneficial to improve the kinetics of O3 decomposition; (2) O2 produced during the O3 decomposition process can be reutilized to generate 1O2, which prolongs the utilization efficiency of O3. In addition, Ov-Bi2O3 was loaded onto carbon fiber, which also demonstrates efficient activity. This work provides an alternative way to design efficient catalysts toward removal of phenolic pollutants via ozone oxidation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
JOURNAL OF CHROMATOGRAPHY A
·
2019
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IF 3.858
Zi-Meng Wang,Cheng-Xiong Yang,Xiu-Ping Yan
Chiral crystalline sponges (CCSs) are a recent class of chiral porous metal complexes potential in chiral recognition. Here we report the fabrication of polysiloxane OV-1701 incorporated CCS-3S (PSO/CCS-3S) coated capillary column as a novel stationary phase for gas chromatographic separation of diverse racemates. CCS-3S with the chiral ligand of ( S )-mandelic was selected as the model CCS. With the aid of polysiloxane OV-1701, PSO/CCS-3S coated capillary column gave improved resolution, broader enantiomers separation scope and much larger McReynolds constants than CCS-3S coated capillary column. Many racemates that cannot be separated on CCS-3S coated capillary column were well resolved on PSO/CCS-3S coated capillary column. The PSO/CCS-3S coated capillary column also gave wide linear range, low limit of detection, good repeatability and reproducibility, and fine inertness and anti-column bleeding properties for the separation of enantiomers. In addition, the PSO/CCS-3S coated capillary column presented better resolution for the studied racemates than commercial β-cyclodextrin based Cyclosil B (30 m long ×0.32 mm i.d. × 0.25 μm film thickness), β-DEX 225 (30 m long ×0.25 mm i.d. × 0.25 μm film thickness) and amino acid based Chirasil L-Val (25 m long ×0.25 mm i.d. × 0.12 μm film thickness) capillary columns. These results indicate the great potential of PSO/CCS-3S coated capillary column in separation of enantiomers.
研究领域:
分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Yingdong Wu,Yan Wang,Pei Zhu,Xiao Ye,Ruonan Liu,Wangfeng Cai
Effective controllable manufacturing oxygen vacancy and polypyrrole coating can optimize the capacitive and cyclic properties of Co 3 O 4 . Herein, composition of O v -Co 3 O 4 @PPy with Co 3 O 4 rich in oxygen vacancy defects and polypyrrole was synthesized using NaBH 4 reduction and chronoamperometry. O v -Co 3 O 4 was synthesized while regulating the concentration of the reducing agent NaBH 4 solution, and then O v -Co 3 O 4 @PPy was synthesized by electrodeposition of PPy. The specific capacitance of O v -Co 3 O 4 @PPy formed at an optimal NaBH 4 concentration and electrodeposition time was about three times that of Co 3 O 4 without reduction treatment and unwrapped PPy. The capacitance retention rate of O v -Co 3 O 4 @PPy was close to 80.5% after 5000 cycles. In addition, O v -Co 3 O 4 @PPy//AC asymmetric supercapacitor was assembled with the as-prepared O v -Co 3 O 4 @PPy as the positive electrode material and activated carbon as the negative electrode, which yielded specific energy density up to 74.55 Wh kg −1 at 850 W kg −1 power density and a capacitance retention rate close to 110% after 10,000 cycles.
研究领域:
材料科学
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电化学
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DOI
高影响因子
eScience
·
2026
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IF 36.6
Yucheng Lv,Tao Yang,Enhui Wang,Bo Shen,Kang Wang,Hongyang Wang,Kuo-Chih Chou,Xinmei Hou
Self-powered wearable electronics for real-time physiological monitoring require mechanical energy harvesters that simultaneously offer high sensitivity, flexibility, and power density, yet most existing piezoelectric nanogenerators struggle to efficiently convert low-frequency biomechanical energy under these constraints. In particular, polyvinylidene fluoride (PVDF)-based composite fibers often suffer from limited interfacial charge transport and insufficient piezoelectric response, which restricts their use in practical, textile-integrated devices. Here, we develop a high-performance piezoelectric composite fiber, PZT-O V /Ti 3 C 2 T x /PVDF, by electrostatic spinning self-assembly of oxygen vacancy–engineered lead zirconate titanate (PZT-O V ), MXene (Ti 3 C 2 T x ), and PVDF. The resulting prickly-fibril interfacial structure between PZT-O V and Ti 3 C 2 T x enables ultrafast carrier transport and enhanced mechanosensitive, yielding flexible piezoelectric nanogenerators (PENGs) with a 15-fold increase in current density under compression. Optimized devices deliver a peak power density of 4.78 μW cm −2 , a sensitivity of 1.46 V kPa −1 , and an energy conversion efficiency of 14.8%. Integrated into wearable textiles, these PENGs harvest subtle biomechanical energy and wirelessly transmit data via Bluetooth, enabling self-powered monitoring of body temperature and heart rate. These results demonstrate that combining oxygen vacancy engineering with MXene-assisted interfacial design in electrospun fibers is an effective strategy for advancing high-performance, self-powered wearable biosensing systems.
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产品关联
DOI
高影响因子
Advanced Science
·
2025
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IF 14.1
Chaomin Duan,Meng Wang,Yan Zhang,Zhihua Lian,Wenpo Shan
Ammonia (NH 3 ) emissions adversely affect both the environment and human health. The selective catalytic oxidation of NH 3 (NH 3 -SCO) holds great promise for NH 3 abatement; however, there remains a lack of cost-effective NH 3 -SCO catalysts with high activity and N 2 selectivity for practical applications. This study reports on a strategy for constructing an outstanding NH 3 oxidation catalyst via the in situ doping of Cu into CeO 2 nanorods. The designed CeCuO x nanorod catalyst shows remarkable activity, N 2 selectivity, and stability for NH 3 oxidation, achieving complete conversion below 250 °C, with ≈80% N 2 selectivity. The results of various characterization tests and density functional theory (DFT) calculations show that the addition of Cu induces the formation of abundant Cu + -O v -Ce 3+ active sites on the CeO 2 , which are beneficial for the adsorption and activation of reactants. Additionally, in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) confirms that the addition of Cu switches the primary intermediate species of NH 3 oxidation from bidentate nitrate species to monodentate nitrate species, which accelerates the rate-determining step of NH 3 -to-N 2 oxidation. Therefore, doping Cu into CeO 2 greatly improves its NH 3 oxidation activity and N 2 selectivity. This study provides valuable insights into the construction of highly active sites for NH 3 oxidation.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Xinwei Li,Haiwei Li,Yu Huang,Junji Cao,Tingting Huang,Rong Li,Qian Zhang,Shun-cheng Lee,Wingkei Ho
To understand the conversion mechanism of photocatalytic gaseous formaldehyde (HCHO) degradation, strontium (Sr)-doped TiO 2– x –OV catalysts was designed and synthesized in this study, with comparable HCHO removal performance. Our results proved that foreign-element doping reduced Ti 4+ to the lower oxidation state Ti (4– x )+ , and that the internal charge kinetics was largely facilitated by the unbalanced electron distribution . Oxygen vacancies (OVs) were developed spontaneously to realize an electron-localized phenomenon in TiO 2– x –OV, thereby boosting O 2 adsorption and activation for the enhanced generation of reactive oxygen species (ROS). At the chemisorption stage, in-situ DRIFTS spectra and density functional theory calculation results revealed that surface adsorbed O 2 (O ads ) and lattice O (O lat ) engaged in the isomerisation of HCHO to dioxymethylene (DOM) on TiO 2– x –OV and TiO 2 , respectively. Time-resolved DRIFTS spectra under light irradiation revealed that the DOM was then converted to formate and thoroughly oxidized to CO 2 and H 2 O in TiO 2– x –OV. While bicarbonate byproducts were detected from DOM hydroxylation or possible side conversion of CO 2 in TiO 2 , owing to insufficient consumption of surface hydroxyl. Our study enhances the understanding on the photocatalytic oxidation of HCHO, thereby promoting the practical application in indoor air purification .
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Jiye Jia,Xiaoxin Shi,Feng Yang,Huanxin Luo,Pei Feng,Cijun Shuai
Fenton reaction can kill bacteria by producing strong oxidizing •OH by the chain reaction between Fe 2+ and H 2 O 2 , exhibiting great potential in the treatment of bacterial infection caused by bone graft. However, the properties of bone implants endowed by the Fenton reaction are generally insufficient due to the limitation of the concentration of Fe ions and reaction conditions. Herein, photothermal therapy was applied to enhance the Fenton reaction of scaffold to obtain excellent antibacterial properties, and the scaffold composited of polycaprolactone/polyglycolic acid blends (PCLGA) and oxygen vacancy Fe 3 O 4 /TiO 2 (OV-FeTiO 2 ) nanoparticles was fabricated by selective laser sintering. The results showed that OV-FeTiO 2 nanoparticles possessed excellent photothermal conversion capability, and the temperature of scaffold rose from 20 to 45 °C after 5 min of irradiation by near-infrared (NIR) light at 0.3 W/cm 2 . Consequently, the Fe ions release rate increased due to the accelerated degradation of PCLGA, and the release of Fe ions reached about 5.1 ‰ at 54 °C, which was 1.41 times than that at 25 °C. Benefiting the increase of reaction temperature and release rate of Fe ions, the Fenton reaction activity was enhanced to generate more •OH. The antibacterial experiments showed that the PCLGA/OV-FeTiO 2 scaffold possessed the best antibacterial properties, and the bactericidal rates against E. coli and S. aureus were 97.2 % and 93.5 %, respectively. Besides, in vitro cell experiments demonstrated that the scaffold possessed good biocompatibility and the treatment of NIR irradiation was harmless for cell growth, proliferation and differentiation.
研究领域:
生物材料
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生物医学工程
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抗菌治疗
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组织工程
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纳米医学
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
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2023
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IF 3.9
Cheng Zuo,Xishi Tai,Qian Su,Zaiyong Jiang,Qingjie Guo
In the field of photocatalysis , the loaded photocatalyst possesses the advantages of controllable morphology, uniform preparation, low cost, and easy recovery. It can effectively avoid the secondary pollution caused by the powder catalyst and is considered a potential substitute for the powder photocatalyst. In this work, TiO 2 and Cu 7 S 4 hybrid materials with oxygen vacancies (OV) grown in situ on copper mesh (CM) were prepared by anion exchange and hydrothermal reaction . The characterization results showed that the concentration of oxygen vacancies in TiO 2 increased significantly after calcination . Under the simulated visible light , the liquid film reaction was adopted. The yield of NH 3 synthesized by OV–TiO 2 @Cu 7 S 4 /CM photocatalyst was 133.42 μmol cm −2 h −1 , 5.2 and 2.2 times that of pure TiO 2 and Cu 7 S 4 , respectively. The enhanced photocatalytic performance is attributed to the synergistic effect between the interfacial electric field of the S-scheme heterostructure and the abundant oxygen vacancies , which induces the efficient separation and migration of carriers. The cycle experiment showed that OV–TiO 2 @Cu 7 S 4 /CM heterojunction has excellent stability in photocatalytic nitrogen fixation . This work provides insight into the design of S-scheme photocatalysts with rich surface defects for green and efficient reduction of N 2 .
研究领域:
光催化
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材料科学
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环境科学
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纳米技术
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能量转换
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DOI
高影响因子
ACS Catalysis
·
2026
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IF 13.6
Shufen Ma,Yachao Wang,Guofeng Zhao,Weixin Huang,Cong Fu
Photocatalytic oxidative dehydrogenation of ethane (ODHE) is a promising route to ethylene under mild conditions, yet achieving a high yield and selectivity is challenging due to the inert C–H bonds and overoxidation to CO2. In this study, we present ZnO fine nanoparticles decorated with highly dispersed Pd species and featuring closely associated interfacial oxygen vacancies (Ov) for highly selective ODHE. The optimized catalyst achieves a C2H4 production rate of 8.5 mmol g–1 h–1 with a selectivity of up to 96.1%, surpassing most reported photo- and thermocatalysts and maintaining robust stability for over 10 h. Through a combination of operando DRIFTS, in situ XPS, and in situ EPR analyses, we demonstrate that the enhanced photocatalytic performance stems from a synergistic, spatially separated dual-site configuration involving Pd species and adjacent interfacial Ov. This configuration enhances spatial charge separation, promotes oxygen activation, and facilitates the selective conversion of C2H6 into key *C2H4 intermediates, thereby boosting ethylene formation. This work not only provides fundamental insights into the photocatalytic ODHE mechanism but also underscores the importance of interfacial engineering in the design of highly efficient photocatalysts for alkane conversion.
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产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Muhua Chen,Yuqing Wang,Mengting Li,Bo Fu,Jihuai Tan,Licheng Li,Meisi Chen
The construction of efficient interfacial active sites in metal oxides remains a major challenge for driving the CO 2 cycloaddition under mild conditions. Herein, we engineered a Co x Mg 1-x O solid solution catalyst via a controlled reduction strategy, which achieves near-atomic dispersion within the MgO lattice. The catalyst delivers 96 % yield of cyclic carbonate from epichlorohydrin at 90 °C and 0.1 MPa CO 2 , surpassing the performance of benchmark MgO and Co 3 O 4 catalysts and maintaining stability over five cycles. Structural and spectroscopic characterization (XRD, XPS, UV-Vis) combined with DFT calculations reveal that the high activity originates from synergistic Co-O V -Mg interfacial sites, where Lewis acidic Co 2 + activates epoxides and adjacent oxygen vacancies facilitate CO 2 adsorption. This synergistic effect lowers the energy barrier for the rate-determining ring-opening step to 0.37 eV. This work demonstrates the rational design of oxide solid solutions to create cooperative interfacial sites for efficient CO 2 conversion under mild conditions.
研究领域:
催化化学
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材料科学
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二氧化碳利用
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多相催化
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可持续化学
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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）