ACS Applied Nano Materials
·
2025
·
IF 5.5
Yong Zhang,Haotian Xiong,Qingdong Chen,Mingcong Tang,Zijian Wang,Jingdu Bian,Dongzhi Zhang
In the automotive industry, improper handling and excessively high temperatures can lead to the failure of lithium-ion batteries. Early failure of lithium batteries can produce trace amounts of gases, such as carbon monoxide (CO) and carbon dioxide (CO2). In this study, hollow spherical nickel oxide (NiO) was prepared using a carbon sphere template method and then combined with Ti3C2Tx (MXene). Most of the NiO hollow spheres had a diameter of about 700 nm. By variation of the ratio of MXene, a carbon monoxide sensor was fabricated, enabling the detection of CO at room temperature. The surface morphology and elemental composition of the materials were analyzed. Experimental and characterization results show that the NiO/MXene composite exhibits faster response/recovery times, higher sensitivity, and better selectivity to CO. The response time of NiO/MXene to 400 ppm of CO is only 8 s, and the recovery time is 16 s. The sensor’s sensitization mechanism was explained through first-principles calculations. This sensor can be applied in lithium battery status monitoring and fault warning systems.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Wang Qiyou,Luo Tao,Cao Xueying,Gong Yujie,Liu Yuxiang,Xiao Yusen,Li Hongmei,Gröbmeyer Franz,Lu Ying-Rui,Chan Ting-Shan,Ma Chao,Liu Kang,Fu Junwei,Zhang Shiguo,Liu Changxu,Lin Zhang,Chai Liyuan,Cortes Emiliano,Liu Min
Single-atom catalysts (SACs) have received increasing attention due to their 100% atomic utilization efficiency. The electrochemical CO 2 reduction reaction (CO 2 RR) to CO using SAC offers a promising approach for CO 2 utilization, but achieving facile CO 2 adsorption and CO desorption remains challenging for traditional SACs. Instead of singling out specific atoms, we propose a strategy utilizing atoms from the entire lanthanide (Ln) group to facilitate the CO 2 RR. Density functional theory calculations, operando spectroscopy, and X-ray absorption spectroscopy elucidate the bridging adsorption mechanism for a representative erbium (Er) single-atom catalyst. As a result, we realize a series of Ln SACs spanning 14 elements that exhibit CO Faradaic efficiencies exceeding 90%. The Er catalyst achieves a high turnover frequency of ~130,000 h − 1 at 500 mA cm − 2 . Moreover, 34.7% full-cell energy efficiency and 70.4% single-pass CO 2 conversion efficiency are obtained at 200 mA cm − 2 with acidic electrolyte. This catalytic platform leverages the collective potential of the lanthanide group, introducing new possibilities for efficient CO 2 -to-CO conversion and beyond through the exploration of unique bonding motifs in single-atom catalysts.
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MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Xu Wang,Quan Gao,Yongfa Zhou,Zhihan Wang
Sustainable cellulose has attracted considerable attention in the field of renewable supercapacitor owing to its low-cost and lightweight properties. However, it is still a challenge to enhance their electrochemical performance. Here, nitrogen (N) and phosphorous (P) co-doped carbon aerogels derived from cellulose were synthesized via the sol-gel-lyophilization-carbonization method. Their structures were determined by scanning electron microscopy (SEM), nitrogen sorption isotherm, and X-ray photoelectron spectroscopy (XPS). The N/P co-doped carbon aerogel exhibited significantly enhanced porous surface properties, and the increasing contents of the N and P could provide more defects and active sites. Therefore, the sample achieved a high specific capacitance of 235.5 F g −1 at 0.5 A g −1 , while also demonstrating good retention of specific capacitance with 62.6 % of initial capacitance at 20 A g −1 . The electrode exhibited 87 % capacitance retention and an excellent coulombic efficiency of close to 100 % after undergoing 10,000 cycles at a current density of 6 A g −1 . Overall, the synthesized cellulose carbon aerogels, modified through doping engineering, have been identified as a promising candidate for supercapacitor electrodes.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-14
·
IF 14.7
Zhao Chengkun,Li Xing,Han Xiaowen,Li Zhulian,Bian Shaoquan,Zeng Weinan,Ding Mingming,Liang Jie,Jiang Qing,Zhou Zongke,Fan Yujiang,Zhang Xingdong,Sun Yong
The assembly of oligopeptide and polypeptide molecules can reconstruct various ordered advanced structures through intermolecular interactions to achieve protein-like biofunction. Here, we develop a “molecular velcro”-inspired peptide and gelatin co-assembly strategy, in which amphiphilic supramolecular tripeptides are attached to the molecular chain of gelatin methacryloyl via intra-/intermolecular interactions. We perform molecular docking and dynamics simulations to demonstrate the feasibility of this strategy and reveal the advanced structural transition of the co-assembled hydrogel, which brings more ordered β-sheet content and 10-fold or more compressive strength improvement. We conduct transcriptome analysis to reveal the role of co-assembled hydrogel in promoting cell proliferation and chondrogenic differentiation. Subcutaneous implantation evaluation confirms considerably reduced inflammatory responses and immunogenicity in comparison with type I collagen. We demonstrate that bone mesenchymal stem cells-laden co-assembled hydrogel can be stably fixed in rabbit knee joint defects by photocuring, which significantly facilitates hyaline cartilage regeneration after three months. This co-assembly strategy provides an approach for developing cartilage regenerative biomaterials.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Shengguo Zhang,Xiaodong Wang,Qiuye Li,Jianjun Yang
In this paper, V-Mo co-doped akaganeite (β-FeOOH) was prepared by one-pot hydrothermal method and the oxidative desulfurization (ODS) of dibenzothiophene over the catalyst was carefully investigated. 0.07 g (ca. 0.35 wt% of model oil) of catalyst induced 100 % of DBT removal in 60 min with a O/S of 20:1 under 60 °C for the model oils with any of the sulfur contents, 100 ppm, 500 ppm, or 1000 ppm. Moreover, the DBT removal after recycling 4 times is still 100 % and it only declines to 98.04 % in the fifth cycle, which indicates that the catalyst has a good stability and recycling performance. Doping V species in Mo doped β-FeOOH not only initiates a micro-variation in catalyst structure and the resultant more active •OH species but also forms a more stable structure of the catalyst, enabling the catalyst to exhibit a higher ODS reaction rate and a better reusability. The GC-MS analyses demonstrated that the DBT was converted to DBTO 2 by two steps: (1) DBT→ DBTO; (2) DBTO→ DBTO 2 , and the former is the rate-limiting step.
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Sustainable Energy & Fuels
·
2024
·Vol. 8
·期 23
·5428-5436
·
IF 5
Jiangfeng Mou,Jin Hu,Tianyou Chen,Kaizhao Wang,Kaijun Wang,WeiJun Zhang,Shuai Wu,Jin Shi,Pengchong Zhao
Electroreduction of CO2 into fuels and valuable chemicals is an effective way to alleviate the greenhouse effect. However, CO2 is chemically inert owing to the highly stable CO bond. Thus, CO2 activation is recognized as a critical reaction step in the process. As electron transfer to CO2 is commonly accepted as the key step during the activation of CO2, it is crucial to engineer the electronic properties of catalysts to enhance their performance in the electrochemical reduction of CO2. Herein, we prepared a CuGa2 catalyst with oxygen vacancies (O–CuGa2) to effectively improve product selectivity. O–CuGa2 exhibited a current density of 32.9 mA cm−2 with a faradaic efficiency of 82.6% for CO production in a tetrabutylammonium chloride/acetonitrile (Bu4NCl/AN) electrolyte, which is 2.5 times higher than that exhibited by CuGa2. XPS and EPR results indicated that OV concentration in O–CuGa2 is much larger than that in the CuGa2 catalysts. The results of electrokinetic studies indicated that the introduction of OVs facilitate electron transfer to CO2.
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ChemistrySelect
·
2024
·Vol. 9
·期 25
·e202304989
·
IF 1.9
Ying Chen,Zhangyi Lv,Jinqiu Yuan,Mingchun Bi,Yuning Liang
Graphical ZIF-67 nanocubes (ZIF-67 NCs) had been etched to produce small amounts of cross-linked Co-LDH-1 while preserving the cubic structure, which provided sufficient quantities of cobalt ions. The catalytic activity of OER has been enhanced by the cubic-structured LDH, which leads to a significantly lower overpotential in alkaline media and a calculated lower activation energy Ea. To address the substantial energy needs of the quickly evolving modern civilization, efforts are still needed to provide sustainable renewable energy sources. The electrocatalytic Oxygen evolution reaction (OER) is one of the essential technologies used in the various hydrogen production techniques. ZIF-67 nanocubes (ZIF-67 NCs) were synthesized in an aqueous solution and used as sacrificial templates. Cobalt nitrate hexahydrate was added under water bath conditions, resulting in the evolution of numerous small layered layers of cobalt hydroxide. This ultimately led to the formation of multilayered, three-dimensionally crosslinked Co-LDH with a porous networked cubic morphology. Hydrolysis of Co 2+ at different concentrations produces different degrees of weak acidic environments, and the loose LDH on the cubic structure of the best catalyst, Co-LDH-1, exposes more active cobalt sites for the OER, which results in a high electrochemically active surface area, with an overpotential of 354 mV and a Tafel slope of 79.06 mV dec −1 at a current density of 10 mA cm −2 , and good stability and low activation under alkaline condition also has good stability and low activation energy. It provides us an easy and practical plan for logically creating ZIF-derived hydroxide materials, leading to the development of affordable and effective electrocatalysts.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Fei Liu,Haoxuan Zhang,Jingjing Qu,Changlai Yuan,Xiao Liu,Yuntao Huang,Qihan Chen,Letian Liu
To compensate for the large positive temperature coefficient of resonant frequency (τ f ) in a typical ABO 3 -type perovskite-structured Sm 0.5 Na 0.5 TiO 3 ceramic material, the laminated Sm 0.5 Na 0.5 TiO 3 -Sm 0.5 Li 0.5 TiO 3 (SNT-SLT) microwave dielectric ceramic system is designed with the tunable layer mass fractions. Among all the compositions of x gSm 0.5 Na 0.5 TiO 3 -(2– x )gSm 0.5 Li 0.5 TiO 3 ( x = 0.8, 0.9, 1.0, 1.1, and 1.2) and the sintered temperatures (1200–1400 °C), the sample with 0.9 g SNT and 1.1g SLT sintered at 1200 °C exhibits a near-zero τ f ≈ −1.1 ppm/°C, while maintaining a relatively higher ε r ≈ 69.6 and Q×f ≈ 3043 GHz in these SNT-SLT ceramics. Wherein, the most noteworthy characteristic results show that the interfacial diffusion of A-site cations leads to the formation of an inhomogeneous solid-solution region, which becomes more pronounced at the higher sintering temperatures. Additionally, the relatively higher sintered temperatures (1250–1400 °C) can intensify the interfacial diffusion and solid-solution formation, which ultimately results in a decrease in the Q×f values. The microwave dielectric measurements in the 3–4 GHz band reveal that the τ f values vary approximately linearly with the increasing SNT content. This study presents a promising strategy for the development of the advanced bilayer ceramic systems and highlights their potential in the next-generation 5G/6G communication devices.
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Science Bulletin
·
2025
·
IF 21.1
Tongtong Yang,Heng Liu,Hengjie Liu,Weiyi Zhao,Jiawei Ge,Wenhui Wang,Shuai Yang,Meijian Tang,Kai Wei,Kangcheng Wang,Zeming Qi,Xian Wang,Hao Li,Junjie Ge
Single-atom catalysts (SACs) challenge conventional multi-site catalysis by enabling oxidative processes like H 2 and CO oxidation. However, we herein present that the completely isolated SACs are inactive, while spatially adjacent single-atom pairs (interatomic distance < 4 Å) work cooperatively as the true active sites. Rh atomic densities were precisely tuned between 0.1 wt%–17.5 wt% via graphene quantum dots confinement. Mathematical modeling quantifies the scaling of active pairs versus electrochemical performance, rationalizing activity dependence on atomic proximity. 18 O isotope labeling and in situ synchrotron infrared spectroscopy analyses identified a new reaction mechanism, with water bifunctional dissociation enabled on sub-4 Å Rh pairs, and acts as the rate-determining step towards both CO and H 2 oxidation. While H 2 O enters the COOR process as a reactant and enters the HOR process as a molecular catalyst. Our findings redefine bifunctional catalysis, merging single-atom precision with nanoparticle-like cooperativity for efficient energy conversion systems.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-9
·
IF 17.694
Zhang He-Shan,Dong Xue-Mei,Zhang Zi-Cheng,Zhang Ze-Pu,Ban Chao-Yi,Zhou Zhe,Song Cheng,Yan Shi-Qi,Xin Qian,Liu Ju-Qing,Li Yin-Xiang,Huang Wei
Neuromorphic electronics, which use artificial photosensitive synapses, can emulate biological nervous systems with in-memory sensing and computing abilities. Benefiting from multiple intra/interactions and strong light-matter coupling, two-dimensional heterostructures are promising synaptic materials for photonic synapses. Two primary strategies, including chemical vapor deposition and physical stacking, have been developed for layered heterostructures, but large-scale growth control over wet-chemical synthesis with comprehensive efficiency remains elusive. Here we demonstrate an interfacial coassembly heterobilayer films from perylene and graphene oxide (GO) precursors, which are spontaneously formed at the interface, with uniform bilayer structure of single-crystal perylene and well-stacked GO over centimeters in size. The planar heterostructure device exhibits an ultrahigh specific detectivity of 3.1 × 10 13 Jones and ultralow energy consumption of 10 −9 W as well as broadband photoperception from 365 to 1550 nm. Moreover, the device shows outstanding photonic synaptic behaviors with a paired-pulse facilitation (PPF) index of 214% in neuroplasticity, the heterosynapse array has the capability of information reinforcement learning and recognition.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Huihuang Shen,Changdong Ju,Junjun Wang,Huabo Huang,Jiayou Ji,Liang Li
There is a challenge to boost the electromagnetic wave absorption performance of magnetic carbon-based materials by rationally adjusting the structure of MOF. In this paper, nanoclip-shaped polypyrrole (PPy) was wrapped on the surface of the Co/C nanoparticle derived from Co-MOF via in-situ polymerization of pyrrole with the help of cetylammonium bromide. The electromagnetic parameters of prepared Co/C@PPy can be easily tuned by adjusting the feed ratio of PPy to Co/C. The optimum value of reflection loss (RL) for Co/C@PPy is −45.49 dB at 2.4 mm and 15.12 GHz when the feed ratio of pyrrole to Co/C is 200 μL to 80 mg, and the effective absorption bandwidth (EAB, RL ≤ −10 dB) reaches 5.97 GHz (11.76–17.73 GHz) at the matching thickness of 2.5 mm. This study paves the way for further design and preparation of the nanocomposites based on MOF-derived nanostructures with excellent EMW absorption performance.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Xinya Wang,Qi Wang,Wei Zhang,Ruirui Cao,Mingxing Chen,Changfa Xiao
With the escalating issue of air pollution, the development of air filtration materials that can efficiently remove particulate pollutants, particularly nanosized particles, from air has attracted more and more research attention in recent years. Electrospun nanofiber membranes with a nanoscale pore structure have been widely used as air filtration materials. Along these lines, in this work, polyvinylidene fluoride-co-hexafluoropropyle (PVDF-HFP) nanofiber membranes with a multihierarchical gradient structure were fabricated by varying the sodium dodecyl sulfate (SDS) concentration. The proposed multihierarchical gradient structure was composed of upper, middle, and lower nanofiber layers, which could effectively filter PM0.3. The decreased nanofiber diameter by increasing the SDS concentration was attributed to the low surface tension and high charge balance. Compared with the single- and double-hierarchical PVDF-HFP nanofiber membranes, the triple-hierarchical PVDF-HFP nanofiber membranes demonstrated excellent air filtration performance. Among them, F014 yielded optimal air filtration performance, exhibiting a high filtration efficiency of 99.50%, a low pressure drop of 71.4 Pa, and a quality factor of 0.0878 Pa–1. Furthermore, the filtration efficiency was maintained above 99% and the pressure drop just increased by 27.4% over a 40 min air filtration test, which indicated that F014 showcased exceptional durability, owing to the multihierarchical gradient structure. Our work paves the way for the fabrication of electrospun nanofiber membranes with a multihierarchical gradient structure using a straightforward method, highlighting their potential as an alternative to traditional air filter materials for various practical applications.
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