ELECTROCHIMICA ACTA
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2021
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IF 6.901
Xiaozhong Zhou,Zhaoyi Qi,Yuyuan Jiang,Pengfei Yan,Juanxia Ding,Haiyan Wang,Hongkai Lu,Dongxu Liu,Kaifa Dong,Yougen Tang,Dongfei Sun,Ziqiang Lei
SiO x is regarded as a promising anode material for the next-generation lithium-ion batteries with high energy density. However, the reduplicative volume changes during cycling cause the pulverizations of Si, leading to decreased utilization of active Si component and poor cycling performance. Herein, a facile and scalable Fe-Cr decorating strategy is reported to boost the lithium storage of SiO x anode. Our comprehensive characterizations indicate that there are strong interactions between Fe-Cr and SiO x during a facile ball milling process. After cycling, Fe-Cr nanoparticles are dispersed in the in-situ formed lithium silicates and Li 2 O matrix, which can maintain superior conductivity of lithium ion and electron for the active components through point-to-point connections. This unique structure boosts the electrochemical de-alloying process of the low-valent Li x Si (0 ≤ x ≤ 2), and increases effective utilization of the active Si component during cycling, resulting in improvement of reversible capacity and cycling stability. This bm SiO x -FeCr electrode can deliver high reversible specific capacity (1370 m Ah g −1 at 200 mA g −1 ), good rate capability (653.8 m Ah g −1 at 2000 mA g −1 ), and superior cycling stability. This work provides a promising route for improving the utilization of active Si component and the structural stability of SiO x -based anodes.
研究领域:
材料科学
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电化学
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纳米材料
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能源存储
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电池技术
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固态物理
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Lezhuo Li,Shangyun Chen,Jiaxin Liu,Zhongkang Cao,Ke Wang,Xu Zhang,Bingjun Yang,Juan Yang,Tianhong Zhou,Pengjun Ma
Spinel oxides are promising electrocatalysts whose activity can be tuned by elemental composition, yet understanding multicomponent synergy remains challenging. Herein, a Spinel-type medium-entropy CoFeCrNiO 4 electrocatalyst is developed, and a Cr-Ni synergistic strategy is proposed to regulate dynamic surface reconstruction during OER. The catalyst exhibits an overpotential of 263.4 mV at 10 mA cm −2 and 365 mV at 300 mA cm −2 in 1 M KOH, with a low Tafel slope of 37.12 mV dec −1 . It also shows excellent stability, with only 2.78% overpotential decay after 24 h operation. In-situ characterization reveals that the Cr-Ni interaction promotes the formation of active oxyhydroxide species during reconstruction. This work provides insights into synergy-driven activity enhancement and offers guidance for the design of high-performance spinel OER catalysts.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
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2026
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IF 3
Wenya Huo,Yike Kuang,Zhendong Sha,Jun Ding
p-Nitrophenol (p-NP) is a toxic and persistent pollutant commonly found in industrial wastewater, necessitating efficient and economically viable treatment strategies. In this work, we develop a low-cost and high-performance catalyst consisting of Fe-Cu-Cr mixed metal oxides supported on activated carbon (AC), synthesized through a simple impregnation-calcination method and applied for peroxymonosulfate (PMS) activation.Systematic optimization of preparation parameters revealed that HCl pretreatment of activated carbon, a ternary Fe-Cu-Cr composition, a 20 wt% metal loading, and calcination at 600 °C yield the highest catalytic activity, achieving p-NP degradation with Ct/C₀ ≈ 0.25 after 4 h. Notably, the total treatment cost can be maintained below 30 CNY per ton of wastewater, demonstrating a substantial economic advantage over reported catalytic systems. Mechanistic studies show that p-NP degradation follows a synergistic adsorption-catalysis pathway, wherein activated carbon enriches p-NP at the catalyst surface and multivalent metal oxides efficiently activate PMS to generate reactive oxygen species, primarily •OH. This work introduces a practical, scalable, and cost-effective catalyst design using earth-abundant metals, offering a promising avenue
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DOI
PubMed
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FUEL PROCESSING TECHNOLOGY
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2023
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IF 7.5
Jie Xu,Xiaowei Liu,Rui Li,Boxiong Shen,Zijian Zhou,Lidan Deng,Lei Liu,Xinbo Zhu
Converting CO 2 into renewable fuel via photocatalysis is of significance to solving the energy crisis and climate change. However, the limited electron transfer in single catalysts always limits the reduction reaction. In this work, a p-n heterojunction was constructed between Cr doped MgAl–LDH (abbreviated as LDH) and Co 3 O 4 for visible-light-driven fuel production. Since LDH and Co 3 O 4 both have the sufficient potentials to drive CO 2 photoreduction, the constructed type-II heterojunction is more favorable for electron utilization efficiency. The optimal Co 3 O 4 /LDH heterojunction exhibited the highest CO evolution rate of 7.42 μmol•g −1 •h −1 and a CO selectivity of 90.5% with TEOA as sacrificial agent . The further characterizations highlight that the addition of Co 3 O 4 greatly improves the light absorption and the heterojunction effectively promotes the reverse migration of electrons and holes. This work investigates and verifies the designed type-II heterojunction based on MgAl–LDH, which has the guidance for the design of heterojunction catalysts and promotes the practical application of MgAl–LDH in photocatalytic region.
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RSC Advances
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2022
·Vol. 12
·期 54
·35064-35071
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IF 4.036
Ailijiang Tuerdi,Peng Yan,Fenggui He,Abdukader Abdukayum
The development of new photocatalysts with high photocatalytic efficiency and catalytic stability, and long persisting luminescence is critical for ensuring environmental protection and clean energy production. In this study, we develop a flower-like In2O3/ZnGa2O4:Cr heterojunction composite with enhanced ultraviolet (UV) photocatalytic activity using a facile two-step hydrothermal method. The spectral response range of the heterojunction composite is widened to the visible-light range owing to the presence of the ZnGa2O4:Cr persistent luminescence nanoparticles with sizes of less than 10 nm. The heterojunction composite is dispersed on the flower petals of In2O3. The In2O3/ZnGa2O4:Cr/1:1 composite exhibits photo-degradation performance for rhodamine B degradation that is superior to those of pure In2O3, ZnGa2O4:Cr, In2O3/ZnGa2O4:Cr/1:0.5 and In2O3/ZnGa2O4:Cr/1:2, achieving complete degradation after 80 min under UV light irradiation. Moreover, it exhibits long afterglow luminescence that lasts for more than 72 h. Thus, the In2O3/ZnGa2O4:Cr/1:1 composite shows great potential for use in round-the-clock photocatalytic applications.
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DOI
PubMed
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Chen Wang,Mingjie Huang,Wentao Hu,Wei Xiang,Tao Zhou,Juan Mao,Feixiang Zan,Xiaohui Wu
The carcinogenic and hard-to-dispose Cr(VI) in high-salinity industrial wastewater has caused severe environmental problems. Herein, a novel hollow spherical CuFe 2 O 4 spinel oxide with concentrated confined oxygen vacancies (HS/CuFe 2 O 4 -OVs) was developed for Cr(VI) decontamination. Such a fancy material delivers a remarkable removal rate of 0.041 min −1 , approximately-one order of magnitude higher than the commonly reported iron-based materials. The OVs in the confined space could exert dual effects on Cr(VI) removal from the aspects of enhanced stabilization via local electronic structure regulation and strengthened immobilization via electron conductivity modulation. Importantly, due to the highly sensitive response of Cr(VI) to the changed confined OVs content, the HS/CuFe 2 O 4 -OVs showed higher selectivity for Cr(VI) removal in the interference of high concentration salts than its nonhollow-structured counterpart and can successfully treat Cr(VI)-contaminated industrial wastewater with high salinity. This work opens up a new concept for rational design of robust spatial confined architectures for Cr(VI) treatment.
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ENVIRONMENTAL RESEARCH
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2022
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IF 8.431
Boyu Jia,Tianbao Liu,Juanjuan Wan,Andrei Ivanets,Yujia Xiang,Lijuan Zhang,Xintai Su
Microbial reduction of hexavalent chromium (Cr (VI)) shows better efficiency and cost-effectiveness. However, immobilization of Cr (III) remains a challenge as there is a limited supply of electron donors. A greener and cleaner option for donating external electrons was using bioelectrochemical systems to perform the microbial reduction of Cr(VI). In this system, we constructed a polydopamine (PDA) decorated Shewanella oneidensis MR-1 ( S. oneidensis MR-1) bioelectrode with bidirectional electron transport, abbreviated as PDA@ S. oneidensis MR-1. The conjugated PDA distributed on the intracellular and extracellular of individual S. oneidensis MR-1 has been shown to accelerate electron transfer by outer membrane C-type cytochromes and flavin-bound MtrC/OmcA pathway by various electrochemical analyses. As expected, the PDA@ S. oneidensis MR-1 biofilm achieved 88.1% Cr (VI) removal efficiency (RE) and 58.1% Cr (III) immobilization efficiency (IE) within 24 h under the autotrophic conditions at the optimal voltage (−150 mV) compared with the control potential (0 mV). The PDA@ S. oneidensis MR-1 biofilm showed increased RE activity was attributed to the shortening of the distance between individual bacteria by PDA. This research provides a viable strategy for in situ bioremediation of Cr(VI) polluted aquatic environment.
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DOI
PubMed
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TRIBOLOGY INTERNATIONAL
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2023
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IF 6.2
Hongming Wei,Gangwen Feng,Xiaoya Li,Wenyi Zhan,Feiyang Li,Yanzhang Dai,Jianpeng Zou
Cu/graphite composites are widely used in various fields as friction materials . However, their tribological properties are limited by the inadequate wettability between Cu and graphite and the insufficient strength of the Cu matrix. To strengthen Cu/graphite composites and improve their interface bonding, this investigation employed Cr 2 AlC to modify Cu/graphite composites fabricated by spark plasma sintering (SPS). The microstructure, interface characteristics, and tribological properties of the composites were thoroughly examined. The results show that the composites exhibit favorable tribological properties, which improved with the increase in sintering temperature . Specifically, as the sintering temperature increases from 800 °C to 980 °C, the friction coefficient of the composites decreases from 0.170 to 0.138, while the wear rate decreases from 9.92 × 10 −7 mm 3 /N·m to 1.86 × 10 −7 mm 3 /N·m.
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Polymer-Plastics Technology and Materials
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2023
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IF 2.7
Qianyong Liang,Ying Pan,Jia Du,Dong Zhang,Yan Zhang,Zhishun Zhong,Hongting Zhao
Carbon sphere@layered double hydroxides filled cellulose nanofibers (ACS@LDHs/CNF) aerogel was successfully synthesized. The removal rate of Cr(VI) using ACS@LDHs/CNFs aerogel at a solid-liquid ratio of 1 g/L was 89.4%, which was higher compared to the removal rate of 65.2% using LDHs alone. The adsorption capacity of ACS@LDHs/CNFs for Cr(VI) was determined to be 44.9 mg/g. The adsorption kinetics followed the pseudo-second-order kinetic equation, and the isotherm data showed good agreement with the Langmuir model. The adsorption mechanism of Cr(VI) onto ACS@LDHs/CNFs aerogel was also investigated. Additionally, the ACS@LDHs/CNFs aerogel demonstrated consistent high adsorption efficiency over 4 consecutive cycles of adsorption-regeneration.
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DOI
高影响因子
BOLETIN DE LA SOCIEDAD ESPANOLA DE CERAMICA Y VIDRIO
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2023
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IF 3.4
Feng Jiang,Junling Yu,Guo Feng,Tao Wang,Xiaojun Zhang,Quan Zhang,Rongchi Zhang,Qian Wu,Qing Hu,Yun Yu,Jianmin Liu
Novel (Cr,V)-ZrSiO 4 jewel green pigments with near-infrared reflection performance were prepared at a low temperature of 900 °C. Effects of Cr/Si mole ratio on phase composition, microstructure, Vis–NIR reflection performance, optical properties and thermal stability were studied. The results show that with the increase of Cr/Si mole ratio from 0 to 0.4, the color of the pigment changes from blue to jewel green and then to dark green. When the Cr/Si mole ratio is 0.2, the (Cr,V)-ZrSiO 4 jewel green pigment shows the best comprehensive properties, which has rendering performance ( L * = 56.69, a * = −18.52, b * = −9.28), thermal stability, and near-infrared reflection performance. The properties especially excellent near-infrared reflection performance make it promising functional pigment in heat insulation. Resumen Se prepararon nuevos pigmentos verde joya (Cr,V)-ZrSiO4 con rendimiento por reflejo en el infrarrojo cercano a una temperatura baja de 900 ̊C. Se estudiaron los efectos de la relación molar Cr/Si sobre la composición de fase, la microestructura, el rendimiento de reflexión Vis-NIR, las propiedades ópticas y la estabilidad térmica. Los resultados muestran que con el aumento de la relación molar Cr/Si de 0 a 0,4, el color del pigmento cambia de azul a verde joya y luego a verde oscuro. Cuando la relación molar Cr/Si es 0.2, el pigmento verde joya (Cr,V)-ZrSiO4 muestra las mejores propiedades integrales, que tiene rendimiento de renderizado (L* = 56.69, a* = -18.52, b* = -9.28), estabilidad térmica y rendimiento de reflexión en el infrarrojo cercano. Las propiedades especialmente excelente rendimiento de reflexión en el infrarrojo cercano lo convierten en un pigmento funcional prometedor en el aislamiento térmico.
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CHEMOSPHERE
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2023
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IF 8.8
Aikui Chen,Yao Huang,Hui Liu
Sulfidated nanoscale zerovalent iron (S-nZVI) has been extensively studied for the reductive removal of Cr(VI), but its applicability is limited by agglomeration and unexpected efficiency reduction. In this study, chitin microsphere supported sulfidated nanoscale zero-valent iron (S-nZVI@Chi-M) was prepared by in-situ one-step reduction method and used to remove Cr(VI) from water. Compared to chitin and chitosan powder, Chi-M with nanofibrous structure and large surface area performed best in stabilizing S-nZVI with a Fe 0 loading content of 3.01 wt%. The S-nZVI particles were homogeneously distributed on the surface of Chi-M, effectively avoiding agglomeration. Compared with bare nanoparticles and supported nZVI, S-nZVI@Chi-M showed significantly enhanced Cr(VI) removal capacity (924.5 mg Cr(VI) for per gram of effective Fe 0 ). The influences of sulfidation degree, dosages, initial Cr(VI) concentration, pH, DO, humic acid and typical ions on Cr(VI) removal kinetics were further studied. S-nZVI@Chi-M could be recycled for at least 4 times with acceptable reactivity. The mechanism investigation results indicated that the Cr(VI) removal was a complex process of reduction, adsorption and co-precipitation under the synergistic effect of Chi-M and S-nZVI. This work provides new ideas for the continuous fabrication of highly reactive nanoparticles, hopefully expanding the application scope of biomass resources in pollution remediation.
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Molecular Catalysis
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2023
·
IF 4.6
Yi Liu,Shuangjiang Li,Xiaojian Yu,Ying Chen,Xiaoning Tang,Tianding Hu,Lan Shi,Manoj Pudukudy,Shaoyun Shan,Yunfei Zhi
For the simultaneous attainment of the utilization of renewable biomass resources and the mitigation of greenhouse effects, it is very promising to develop a green, recyclable, and highly efficient heterogeneous catalyst for the synthesis of cyclic carbonates by CO 2 cycloaddition reaction with epoxides. Herein, novel cellulose nanofibers (CNF) supported (Salen)Cr(Ⅲ) complex was effectively synthesized for the aforementioned reaction. The cellulose nanofibers (CNF) were firstly modified with (3-aminopropyl) triethoxysilane (APTES), and then its Schiff base with salicylaldehyde was synthesized, which further subjected to coordination treatment with chromium chloride to form a novel heterogeneous catalyst, labelled as CNF-(Salen)Cr(Ⅲ). The catalytic performance of the catalysts shown that CNF-(Salen)Cr(Ⅲ) and co-catalyst TBAB can synergistically catalyze the cycloaddition of CO 2 with epichlorohydrin (ECH) at mild reaction conditions, and the yield of chloropropene carbonate (CPC) reached up to 97.8% with high selectivity. The CNF-(Salen)Cr(Ⅲ) complex maintained high catalytic activity after six cycles of repeated runs and has acceptable catalytic effect on other series of epoxies. Based on density functional theory (DFT) calculations, a reaction mechanism including adsorption activation of epoxides, epoxides ring opening, CO 2 insertion, and the formation of cyclic carbonate, was proposed for the CNF-(Salen)Cr(Ⅲ) complex catalyzed cycloaddition of CO 2 with epoxides.
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