Molecular Catalysis
·
2023
·
IF 4.6
Zizheng Zhu,Hongyan Zhang,Wen Guo,Hao Zhou,Yilin Zhou,Wenjie Liang,Maoshuai He,Wenxian Wei,Tingting Yu,Hong Zhao,Tao Yang
The highly efficient catalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are of great significance for electrochemical water splitting. Direct transforming nickel foam (NF) into nickel-based catalysts attracts extensive attention because of its excellent stability and high conductivity. However, the catalytic performances of this kind of catalyst are still far from expected. Herein, we report a series of Ni oxides co-modulated by Mo, V and M ( M =Mn, Fe, Co, Cu) as efficient catalysts for water splitting, which are directly prepared through a simple NF-transformation method. Especially, a MoVNi catalyst displays a low Tafel slope of 68 mV/dec and a small overpotential of 76 mV at 10 mA/cm 2 for HER in 1.0 M KOH solution. The OER performances of MoVNi can be greatly enhanced by M introduction. For example, Fe-MoVNi only requires 374 mV to achieve 100 mA/cm 2 and shows no declination in a-20 h stability test at 100 mA/cm 2 in 1.0 M KOH media. Such performances outperform the recently reported best-performing Ni oxides catalysts in an alkaline environment. The excellent catalytic performances suggest great promise in practical applications.
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Surfaces and Interfaces
·
2024
·
IF 5.7
Yong Shi,Xin Lan Ma,Jin Suo Gao,Feng Yun Yu,Chun Yan Li,Wei Xiong,Li Ping Huang
The catalytic activity, adsorption and synergistic effect over bimetallic MOF derivatives with different dopant metal were systemically compared. A series of Me-Cu/TiO 2 (Me=Fe, Co, Ni) derived from bimetallic Me/Cu-BTC MOFs were fabricated via a sacrificing template method and applied for CO-SCR. Among the bimetallic catalysts, Fe-Cu/TiO 2 presented the best low-temperature of nearly 100% NO conversion from 150 °C to 350 °C with good NO selectivity. For Me-Cu/TiO 2 (Me=Fe, Co, Ni), the productions of crucial Cu + intermediate were determined to be 51.17%, 50.45%,49.4% by XPS, which were consistent with their catalytic activity results. The superior redox behavior of Fe-Cu/TiO 2 can be attributed to its higher Oβ / (Oα +Oβ) ratio of 32.90% and the higher Me 2+ / Me 3+ ratio of 1.79. In situ infrared analysis revealed that the Fe doping not only improved the formation and stability of nitrate species, but also enhanced the quantity of Lewis acid sites by forming Cu + -CO. Furthermore, a possible low-temperature Langmuir-Hinshelwood (L-H) mechanism over Me-Cu /TiO 2 (Me=Fe, Co, Ni) was proposed.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Tao Sun,Ying Li,Yangyang Wang,Qing Yang,Jiahui Du,Jian Hu,Sarula,Tungalag Dong,Xueyan Yun
Biodegradable poly(L-lactic acid) (PLLA) has seldom used for dairy packaging due to medium permeability and brittleness. Novel PLLA copolymers, poly (L-lactic acid- co -butylene itaconate-co-glycolic acid) (PLBIGA), were developed by integrating glycolic acid (GA) and poly(butylene itaconate) (PBI) into PLLA's structure using low molecular weight PLLA as a key initiator. Then, packaging materials with better barrier and mechanical properties were obtained by blended PLBIGA with PLLA. Both PLLA/PLBIGA films and polyethylene nylon composite film (PE/NY) were used for stirred yogurt packaging and storage at 4 °C for 25 days. Results revealed that yogurt packed by PLLA/PLBIGA films maintained stabler water-holding capacity, color, and viscosity over the storage period. Moreover, the integrity of the gel structure and the total viable count of lactic acid bacteria in yogurt packaged in PLLA/40-PLBIGA8 were also found to be superior to those in PE/NY packages, highlighting its eco-friendly advantages in dairy packaging.
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ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Luxin Zhang,Xiaobing Liu,Sishang Ge,Weiwei Shi,Rui Zhang,Chaoyang Li,Rong Chen
The accumulation of heavy metals (HMs) and microplastics in soil has emerged as a major environmental challenge worldwide. In this study, a series of biochars were developed using hollyhock straw as the raw material to remediate soils co-contaminated with Pb, Cr, and Cd. Additional experiments were conducted to assess the impact of polyethylene microplastics (PE-MPs) on the efficacy of biochar in soil remediation. In this study, we utilized the inexpensive and readily available warm patches, which are composed of iron, vermiculite, and activated carbon, in combination with a green and economical deep eutectic solvent (MAG) as modifying agents for biochar. The warm patch and deep eutectic solvent-co-modified biochar (MAG-WIM/B) exhibited superior performance in immobilizing HMs, improving the soil physicochemical properties, enhancing the functional enzyme activity, and increasing the microbial community diversity of soil. Soil incubation experiments showed that the addition of MAG-WIM/B reduced DTPA-extractable Pb, Cr, and Cd contents by 50.8 %, 46.7 %, and 24.2 %, respectively, by day 82. Monte Carlo simulations further revealed a preferential adsorption of Pb in the ternary HM system. Moreover, the introduction of MAG-WIM/B led to a significant improvement in the urease activity and shifted the dominant microbial species from Proteobacteria to Actinobacteria . PE-MPs significantly limited the effectiveness of biochar in remediating HM-contaminated soil by altering its physicochemical properties and competing with HMs for the active sites present on biochar. This work provides a strategic framework for the remediation of soils co-contaminated with multiple HMs and PE-MPs.
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高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2019
·Vol. 79
·期 11
·2068-2078
·
IF 1.624
Zhang Bo,Wang Panpan,Yu Jianxin,Jiang Haicheng,Gao Po,Ma Jun
A simple and efficient route was used to prepare an amphiphilic copolymer (poly(propylene glycol)-co-poly(ethylene glycol)-co-poly(propylene glycol)) (PPG-co-PEG-co-PPG) by one-pot polymerization reaction. This copolymer was used as the hydrophilic additive in preparation of poly(vinylidene fluoride) (PVDF) ultrafiltration membranes via immersion–precipitation process. Surface characteristics of the membranes were confirmed by contact angle measurements, zeta potential, attenuated total reflectance Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and atomic force microscopy. During filtration experiments, the modified membranes showed better permeation and antifouling performances compared to PVDF membranes with bovine serum albumin, sodium alginate and yeast. After hydraulic stirring cleaning with deionized water, water flux recovery and rejection ratio of the modified membranes were higher than those of pristine PVDF membrane, and the flux recovery ratio was maximized at 94.29%. It was suggested that PPG-co-PEG-co-PPG copolymer was anchored in the PVDF membrane through the two hydrophobic ends of PPG blocks, while the hydrophilic intermediate of the PEG block segregated onto the membrane or pore surface during the membrane preparation process. The synthesized method of amphiphilic PPG-co-PEG-co-PPG copolymer paved a novel way to solve the problems of less compatibility between the copolymer and membrane matrix and instability with water molecules in the ultrafiltration process.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Xin Zhang,Zhi-Rong Fu,Jing-Yuan Hao,Yu Han,Hai-Long Liao,Bao-Ju Wang,Yong Luo
The catalytic hydrogenation of nitroaromatic sulfonic acids (NSAs) to synthesize aminoaromatic sulfonic acids (ASAs) is an environmentally promising alternative. However, the deactivation of current catalysts hinders its practical application. In this work, we proposed a strategy of trace sulfur modification to enhance the sulfur-tolerance of the Co@NC catalyst. Characterization revealed that Co@NC-S synthesized with cobalt sulfate has the largest particle size and specific surface area. Using sodium m -nitrobenzenesulfonate (SNS) hydrogenation as a probe reaction, the Co@NC-S catalyst demonstrated superior performance, achieving 99.52% conversion and 98.02% selectivity (100 °C, 3 MPa). Density functional theory (DFT) calculations elucidated that the remarkable sulfur-tolerance of the Co@NC-S catalyst originated from the interaction between the trace sulfur species and the cobalt nanoparticles, thereby weakening the bonding strength of Co with various sulfur-containing compounds. The Co@NC-S catalyst also exhibited excellent stability, magnetic recyclability, and versatility in hydrogenating diverse NSAs, underscoring its significant industrial potential.
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OPTICAL MATERIALS
·
2021
·
IF 3.08
Yuyu Shen,Yi Chen,Liang Chen,Degang Deng,Shiqing Xu
An optical thermometer Bi 3+ , Eu 3+ co-doped Sr 3 La 2 Ge 3 O 12 (SLGO) phosphor with dual-emitting centers was synthesized in high-temperature condition. The X-ray diffraction patterns , SEM , EDS , luminescent properties and optical temperature sensing characteristics were exhaustive investigated. Under UV excitation, the SLGO: Bi 3+ phosphor exhibits the 3 P 1 → 1 S 0 blue luminescence of Bi 3+ peaked at 400 nm and SLGO: Eu 3+ phosphor shows the 5 D 0 → 7 F 2 red luminescence of Eu 3+ peaked at 612 nm. The ET behavior was proved by spectrum overlap between the PL spectrum of Bi 3+ and PLE spectrum of Eu 3+ . Moreover, the decay time of Bi 3+ could be verified the conclusion. Under UV excitation of 291 nm, the maximal value of absolute sensitivity ( S a ) of SLGO: Bi 3+ , Eu 3+ was 0.079 %K −1 at 573 K, and relative sensitivity ( S r ) was 0.831 %K −1 at 473 K. The results proved that SLGO: Bi 3+ , Eu 3+ phosphor could have a good performance in the field of optical thermometer.
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高影响因子
POWDER TECHNOLOGY
·
2019
·
IF 3.413
Aoxue Tian,Liqiong Wang,Nafeng Wang,Shuhao Wang,Jinzhi Cai,Qiao Huang,Yun Huang
Pd supported on mixed ceria-titania oxide catalysts are synthesized with a co-flow diffusion flame , and the catalytic activities for CH 4 oxidation are evaluated in a lab-scale fixed bed. The as-prepared catalysts exhibit high catalytic activities and good Pd cluster distribution. Among them, Pd supported on pure CeO 2 is found to show the best performance. The results show that it has fairly low T 10 , and complete oxidation occurs as low as 400 °C. It is deduced that three factors facilitate the reaction between the adsorbed CH 4 and O 2 , namely, solid-solution-like Pd x Ce 1- x O 2 structures, highly active sites provided by atomic-level assembly during the flame synthesis, and the presence of lattice oxygen. Additionally, the deactivation of the catalyst may be caused by the decreasing of lattice oxygen, the reduction of PdO and the instability of Pd x Ce 1- x O 2 . These results may aid in the development of better catalytic nanomaterials for clean methane oxidation .
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高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2019
·
IF 1.337
Zhen Xiao,Jiawei Zhang,Jing Zhu,Hui Xu,Huanping Wang,Shiqing Xu,Yang Xia
Ho 3+ /Yb 3+ co-doped PbTiO 3 nanocrystals with different content of dopant were successfully prepared via a facile hydrothermal method. The purity, morphology, element distribution, chemical state and up-conversion (UC) photoluminescence (PL) of PbTiO 3 nanocrystals affected by Ho 3+ dopant are investigated systematically. X-ray diffraction (XRD) results illustrate that PbTiO 3 samples with the doping Ho 3+ concentration ranging from 0 to 5 mol-% are perovskite structure. The doping Ho 3+ ions have no change on the crystal structure of perovskite PbTiO 3 . Owing to the non-equivalent substitution of Ho 3+ to Ti 4+ in PbTiO 3 , the particle size of Ho 3+ /Yb 3+ co-doped PbTiO 3 samples is decreased as well as the particle agglomeration is detected. Moreover, Ho and Yb ions have uniform distributions in the PbTiO 3 nanoparticles as the presence of Ho 3+ and Yb 3+ cations. The up-conversion spectra demonstrate that Ho/Yb co-doped PbTiO 3 samples have up-conversion emissions centered at 550 nm, 660 nm and 755 nm, corresponding to the transitions of 5 F 4 ( 5 S 2 )→ 5 I 8 , 5 F 5 → 5 I 8 and 5 S 2 ( 5 F 4 )→ 5 I 7 of Ho 3+ ions. Additionally, the effect of temperature on the UC PL property of Ho 3+ /Yb 3+ co-doped PbTiO 3 system is further investigated. The sensitivity and the trend of Ho 3+ /Yb 3+ co-doped PbTiO 3 samples in temperature from 298 k to 493K are calculated on the basis of fluorescence intensity ratio (FIR) method. Ho 3+ /Yb 3+ co-doped PbTiO 3 nanocrystals are verified the high potential in the optical temperature sensing.
研究领域:
材料科学
·
无机化学
·
纳米材料
·
光子学
·
功能材料
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Nature Communications
·
2026
·
IF 18.1
Jun Pang,Xinyu Bai,Junjie Dai,Sijie Liu,Shuangfeng Yin,Yong Pei,Rong Tan
Artificial photosynthesis of acetaldehyde from atmospheric CO 2 is highly promising, yet remains severely limited by low CO 2 concentration in air and sluggish proton transfer kinetics. Herein, we report metallo hydrogen-bonded organic frameworks (MHOFs) of HNNU-X (X = O, S, Se) which enable acetaldehyde synthesis directly from air, water, and natural sunlight. Among them, HNNU-Se exhibits a competitive acetaldehyde production rate of 557.1 μmol g⁻¹ h⁻¹ with high electron-based selectivity of 95% under outdoor conditions, without need of sacrificial agents. Mechanistic studies reveal that HNNU-X creates a proton-rich microenvironment in which [Zn(tpy)] 2+ cations function as CO 2 capture and activation sites for direct air capture, while [XCN] – anions serve as proton shuttles, facilitating rapid transfer of in-situ generated H⁺ from solar-driven water oxidation to adsorbed CO 2 . This work enables the synergistic coupling of CO 2 reduction and H 2 O oxidation, thereby achieving efficient artificial photosynthesis of acetaldehyde. This study develops metallo hydrogen-bonded organic frameworks (HNNU-X), which overcome the low CO 2 concentration in air and sluggish proton transfer kinetics, achieving artificial photosynthesis of acetaldehyde from air, water and natural sunlight.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Renzhong Xue,Mingpu Li,Xiaosong Liu,Zhihao Zhao,Haiyan Wang,Tingting Zhang,Jing Chen,Tao Li,Xiang Zhu,Zhezhe Wang
Lead-free antiferroelectric AgNbO 3 (AN) ceramics hold significant potential for pulsed power systems; however, their inferior energy storage density and efficiency limit their practical deployment. Optimizing performance under moderate electric fields (300–500 kV cm −1 ) is particularly critical for industrial viability. Herein, a Bi 3+ /Yb 3+ A-site co-doping strategy is proposed to optimize the microstructural characteristics and improve the electrical properties of AN ceramics. The synergistic doping effect effectively enhances antiferroelectric stability and dielectric relaxation behavior, while concurrently suppressing the rapid decay of saturation polarization intensity. Furthermore, refined grain size and a widened band gap jointly improve the breakdown electric field strength. Benefiting from such multi-scale modulation, Ag 0.82 Bi 0.03 Yb 0.03 NbO 3 (ABYN3) ceramic demonstrates a high recoverable energy density of 6.8 J cm −3 and an energy efficiency of 77% under an applied field of 431 kV cm −1 . Moreover, ABYN3 demonstrates superior thermal stability, high frequency tolerance, and resistance to cyclic fatigue. Charge–discharge measurements reveal that ABYN3 exhibits a discharge energy density of 4.06 J cm −3 and an ultrahigh power density of 144 MW cm −3 at 300 kV cm −1 , along with an ultrafast discharge speed (t < 100 ns). This study presents a feasible and effective strategy for performance optimization of lead-free antiferroelectric ceramics, providing valuable guidance for their practical industrial applications in pulsed power systems.
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ACS Catalysis
·
2026
·
IF 13.6
Ni Baoxin,Wen Yihao,Wen Xue,Shen Peng,Zhao Wenxin,Li Sida,Li Xiangrui,Yan Ru,Qu Wanglin,Zhang Guiru,Wang Zi,Shen Shuiyun,Zhang Junliang,Wei Hao
The regulation mechanism of interfacial coatings on CO electroreduction has not yet been unraveled even though high CO-to-C 2+ conversion is observed. In this work, in situ spectroscopy techniques were employed to decouple the regulatory rules of carbon coatings on the hydrogen-bonding network and adsorbed carbon monoxide at the copper-based catalytic interface for CO electroreduction. The coated-carbon layers could promote the CO-to-C 2+ conversion efficiency, as the C 2+ selectivity increased from below 66% (for pure Cu) to above 77% in alkaline electrolyte. Combined with in situ electrochemical infrared spectroscopy, online mass spectrometry, and theoretical calculations, it was found that the carbon coating could reconstruct the interfacial hydrogen-bonding network and enhances its orderliness, thereby inducing more favorable hydrogenation steps for intermediates compared to hydrogen evolution. Meanwhile, the Cu–C interface tunes the vibrational state of linearly adsorbed CO, strengthens Cu–CO interactions, and lowers the energy barrier for C–C coupling toward C 2+ products. To further demonstrate the practical relevance of this mechanism, a self-designed compact integrated CORR prototype was developed, which maintained an ethylene Faradaic efficiency above 40% over 24 h at 15 A. These findings provide molecular-level insight and practical guidance for the design of interfacial-modified Cu catalysts for efficient CO electro-conversion.
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