International Journal of Minerals Metallurgy and Materials
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2026
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IF 8.8
Wang Ziyan,Zhou Meng,Zhang Rongzheng,Zou Yuening,Zhang Sikai,An Wen,Hu Hai,Huang Zhifeng,Ye Zhongqiang,Liu Li
The Na 4 Fe 3 (PO 4 ) 2 P 2 O 7 /C composite (NFPP-E) featuring a highly graphitized N- and P-co-doped carbon coating and hierarchical pore structure was successfully synthesized using a facile ball-milling-calcination approach. Ethylenediamine tetra(methylene phosphonic acid) (EDTMPA) acts as a multifunctional precursor and concurrently serves as a chelating, phosphorus, carbon, nitrogen, and pore-forming agent. The unique “phosphorus-catalyzed graphitization” effect during EDTMPA pyrolysis plays a pivotal role; the released active phosphorus oxides facilitate the ordered transformation of the carbon matrix, thereby yielding a highly graphitized N- and P-co-doped carbon coating with a low defect density. Electrochemical measurements demonstrated significant performance enhancements of NFPP-E relative to the sample prepared with conventional NH 4 H 2 PO 4 . Specifically, NFPP-E delivered a high reversible capacity of 103.09 mAh·g −1 at 0.1 C (1 C = 129 mA·g −1 ) and retained 77.41 mAh·g −1 even at an elevated rate of 10 C, demonstrating excellent rate capability. Furthermore, it exhibited superior long-term cycling stability, with a capacity retention rate of 94.9% after 500 cycles at 1 C. When assembled into a full cell with hard carbon as the anode, the NFPP-E achieved a capacity retention rate of 92.74% over 200 cycles, highlighting its great potential for practical applications. This study not only uncovers the universal principle for regulating the structure and properties of carbon layers via the “phosphorus-catalyzed graphitization” mechanism using organic phosphonic acid precursors but also offers a novel strategy for the development of high-performance and low-cost cathode materials for sodium-ion batteries.
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Small
·
2023
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IF 13.3
Mei Chen,Yiqi Fan,Hongfang Zhou,Guoneng Li
Li metal anodes have attracted attention due to their high specific capacity and low electrochemical potential. Nevertheless, the uncontrolled growth of Li dendrites hinders the practical application of Li metal batteries. Although the various approaches have made performance improvements, safety hazards still exist since Li dendrites are still growing along the anode to the separator during the continuous plating/stripping process. Herein, a straightforward method is proposed to achieve stable Li metal batteries with directional growth control by using a functional ZnO@C/cellulose membrane as a separator. The abundant pore structure and functional groups of biomass cellulose enhance the Li-ion transport and interface compatibility. The ZnO transforms in situ to form a Li–Zn alloy layer which is uniformly coated to the separator to direct uniform ion concentration polarization and charge distribution polarization, control the growth direction of Li, significantly improve the cycling stability, and promote the reversibility of the Li plating/exfoliation process. As a result, the symmetric cell exhibits an extreme lifetime of more than 4500 h and low polarization at 3 mA cm −2 . The cycling performance of the Li||LiFePO 4 full cell reaches a capacity retention of 98% after 270 cycles at a mass loading of 10 mg cm −2 .
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INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2023
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IF 3.6
Mengxian Zhang,Xianrui Zhao,Junting Zhang,Zhigang Fang,Huan Xu,Hongtao Wang
TiB 2 reinforced Ti(C,N)-based cermet was produced by the reaction spark plasma sintering of Co, Ni, Ti, C, BN, Mo 2 C, WC, and TaC mixtures. To understand the mechanism of reaction sintering, systematic investigation on the microstructure evolution and displacement variation rule was carried out. In addition, the influence of C/BN molar ratio on the microstructures and performances of cermet was investigated. Except an initially increased pressure, three densification patterns were found. The first method was the Co Ti, Ti Ni, and Ti-BN diffusion reactions, resulting in a shrinkage of 22.06%. The second pattern was the viscous flow and dissolution-reprecipitation, which corresponded to the synthesis of Ti(C,N) and TiB 2 . In this process, the shrinkage ratio was increased by 35.62%. The final densification mainly originated from the viscous flow of metallic binder. It contributed to the transformation of macrovoids into microvoids, and an increased displacement of 30.10%. With the increasing of C/BN ratio, more C atoms diffused into Ti(C,N). Furthermore, core/rim structure-Ti(C,N) and coreless (W,Mo,Ta,Ti)(C,N) were fabricated. However, the microvoids in cermets enhanced. As a result, the hardness and fracture toughness first increased and then decreased. Results from this work are helpful to understand the reaction spark plasma sintering technique, and can enrich the preparation method of cermet.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Shiyan Li,Hongquan Fu,Xingshuai Zhang,Xu Liu,Giulia Tuci,Giuliano Giambastiani,Cuong Pham-Huu,Yuefeng Liu
H 2 S selective oxidation to elemental sulfur (S 8 ) is a typical reaction where the mass product diffusion ( e.g ., S 8 ) through the catalytic bed is crucial as well as the reagents accessibility ( e.g ., H 2 S, O 2 ) to the active sites. The NaNO 3 -assisted pyrolysis of polyacrylamide was applied to synthesize defect-enriched N-doped carbon nanosheets with thickness up to c.a. 2 nm, featured by fully accessible and highly interconnected pores, for boosting the H 2 S selective oxidation process. The PAM-0.3-700 sample has revealed an unprecedented desulfurization activity with sulfur formation rate of 1165 g sulfur kg cat. −1 h −1 , other than a remarkable stability (>80 h). Experimental and theoretical studies have unveiled the critical role of edge sites containing unpaired electrons and nitrogen species with respect to the material aptitude towards O 2 dissociation and HS - activation. The material in presence of a highly interconnected porous network facilitates the reactants/product diffusion especially for catalysis operated under harsh experimental conditions.
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NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 47
·期 47
·22007-22016
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IF 3.3
Yuxuan Zheng,Junping Zhao,Meifang Yan,Yuhua Gao,Haihua Li,Zhenfa Liu
Pudding-like Fe/C materials were successfully synthesized via an emulsion cross-linking method followed by a heat-treatment process. The morphologies and compositions can be easily controlled via adjusting the heat-treatment temperature. XRD, SEM, TEM, XPS, VSM, BET surface area measurements and zeta potential analysis were used to characterize the as-prepared samples. The adsorption capacity of MB (methylene blue) was systematically studied in different initial concentrations and pH of MB solution and at ambient temperature. Kinetics and isotherm synthesis were fitted well with the model of pseudo-second-order and Langmuir isotherms, respectively. The pudding-like Fe/C composites exhibited excellent adsorption performance in the removal of MB and the maximum adsorption capacity was 243.9 mg g−1, which was obtained for a 100 mg L−1 of MB solution at pH 7.0 and 25 °C. After ten cycles of adsorption experiments, the adsorption capacity can be maintained at about 93%, which indicated that the pudding-like Fe/C exhibited excellent adsorption stability and reusability.
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Nature Communications
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2023
·Vol. 14
·期 1
·1-12
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IF 16.6
Meng Hao,Yang Yusen,Shen Tianyao,Yin Zhiming,Wang Lei,Liu Wei,Yin Pan,Ren Zhen,Zheng Lirong,Zhang Jian,Xiao Feng-Shou,Wei Min
Copper-based catalysts serve as the predominant methanol steam reforming material although several fundamental issues remain ambiguous such as the identity of active center and the aspects of reaction mechanism. Herein, we prepare Cu/Cu(Al)O x catalysts with amorphous alumina-stabilized Cu 2 O adjoining Cu nanoparticle to provide Cu 0 −Cu + sites. The optimized catalyst exhibits 99.5% CH 3 OH conversion with a corresponding H 2 production rate of 110.8 μmol s −1 g cat −1 with stability over 300 h at 240 °C. A binary function correlation between the CH 3 OH reaction rate and surface concentrations of Cu 0 and Cu + is established based on kinetic studies. Intrinsic active sites in the catalyst are investigated with in situ spectroscopy characterization and theoretical calculations. Namely, we find that important oxygen-containing intermediates (CH 3 O* and HCOO*) adsorb at Cu 0 −Cu + sites with a moderate adsorption strength, which promotes electron transfer from the catalyst to surface species and significantly reduces the reaction barrier of the C−H bond cleavage in CH 3 O* and HCOO* intermediates.
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2023
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IF 4.3
Qi Guo,Xiaorong Huang,Yajuan Huang,Zhaowei Zhang,Peiwu Li,Li Yu
Aflatoxin B 1 (AFB 1 ) is a prominent food contaminant known for its high toxicity. Rapid, low-cost, and sensitive detection of AFB 1 is an urgent demand for food safety risk control. In the traditional enzyme-linked immunosorbent assay (ELISA) method for AFB 1 detection, horseradish peroxide (HRP) is high-cost and possesses poor environmental stability. In this study, a direct competitive single-atom nanozymes (SAzymes) -linked immunosorbent assay was developed based on Fe-N-C SAzymes. The proposed methods exhibited excellent sensitivity, rapid detection, fabrication, and low cost. Under the optimal conditions, the limit of detection of the new assay was 3.3 pg mL −1 , with a quantitative relationship between 0.0084 and 0.358 ng mL −1 . In addition, the developed method presented good recoveries in spiked samples, ranging from 84.50% and 103.75%, with coefficients of variation below 10%. Furthermore, the developed detection method showed good consistency (R 2 = 0.9852) with the reference method, liquid chromatography/mass spectrometry (LC-MS/MS). To our knowledge, this is the first report about single-atom nanozymes-based ELISA for AFB 1 determination. This work provides a feasible strategy for the rapid and sensitive detection of food contaminants using SAzymes.
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JACS Au
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2023
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IF 8
Qi Yang,Xiujuan Gao,Faen Song,Xiaoxing Wang,Tao Zhang,Pan Xiong,Yunxing Bai,Xingchen Liu,Xiaoyan Liu,Junfeng Zhang,Gang Fu,Yisheng Tan,Yizhuo Han,Qingde Zhang
Selective oxidation of C–H bonds under mild conditions is one of the most important and challenging issues in utilization of energy-related molecules. Molybdenum oxide nanostructures containing Mo5+ species are effective for these reactions, but the accurate identification of the structure of active Mo5+ species and the catalytic mechanism remain unclear. Herein, unsaturated penta-coordinated Mo5c5+ with a high fraction in MoOx fabricated by the hydrothermal method were identified as the active sites for low-temperature oxidation of dimethyl ether (DME) by the deep correlation of characterizations, density functional theory calculations, and activity results, giving a methyl formate selectivity of 96.3% and DME conversion of 12.5% at unreported 110 °C. Low-temperature electron spin resonance (ESR) and quasi in situ X-ray photoelectron spectra (XPS) with the designed experiments confirm that the Mo5c5+ species can be formed in situ. Molybdenum located at the pentachronic site is preferable to significantly promote the oxidation of the C–H bond in CH3O* at lower temperatures.
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JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Jun Hu,Ruiqi Wang,Shangkun Li,Jun Wu,Zhimin Qiang
Peroxymonosulfate (PMS) is an alternative disinfectant for drinking water . This study aimed to investigate the transformation of iopamidol (IPM) catalyzed by a main copper corrosion product ( c -Cu 2 O) with PMS as a disinfectant. The observed pseudo-first-order constant ( k obs ) for the IPM degradation in the c -Cu 2 O/PMS system (0.033 min −1 ) was 3 times that in the CuO/PMS system (0.011 min −1 ). The quenching tests and the electron paramagnetic resonance (EPR) experiments indicate that O 2 •− and 1 O 2 contributed to IPM degradation in the c -Cu 2 O/ PMS system. The complexation of metastable Cu(II) with a PMS molecule polarized the O O bond and then facilitated the electron transfer from the PMS molecule to other PMS and O 2 molecules, which directly and indirectly promoted the yield of O 2 •− and 1 O 2 . The iodine balance indicated that 26.0% of initial TOI was converted to IO 3 − , and CHI 3 only accounted for 0.6% of the residual TOI. In the c -Cu 2 O/PMS system, IPM conversion was started with amide C−N bond breakage, deiodination reaction and hydrogen abstraction. This study helps to better understand the conversion mechanisms of iodine-containing organic micropollutants when PMS is deployed as a disinfectant in copper pipes.
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SCIENCE OF THE TOTAL ENVIRONMENT
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2023
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IF 9.8
Zhen Rong,Zhi-Hao Ding,Yue-Hong Wu,Xue-Wei Xu
Low-density polyethylene (LDPE), which accounts for 20% of the global plastic production, is discharged in great quantities into the ocean, threatening marine life and ecosystems. Marine microorganisms have previously been reported to degrade LDPE plastics; however, the exploration of strains and enzymes that degrade LDPE is still limited. Here, an LDPE-degrading bacterium was isolated from seawater of the Changjiang Estuary, China and identified as Rhodococcus sp. C-2, the relative abundance of which was dramatically enhanced during PE-degrading microbial enrichment. The strain C-2 exhibited the degradation of LDPE films, leading to their morphological deterioration, reduced hydrophobicity and tensile strength, weight loss, as well as the formation of oxygen-containing functional groups in short-chain products. Sixteen bacterial enzymes potentially involved in LDPE degradation were screened using genomic, transcriptomic, and degradation product analyses. Thereinto, the glutathione peroxidase GPx with exposed active sites catalyzed the LDPE depolymerization with the cooperation of its dissociated superoxide anion radicals. Furthermore, an LDPE degradation model involving multiple enzymes was proposed. The present study identifies a novel PE-degrading enzyme (PEase) for polyethylene bioremediation and promotes the understanding of LDPE degradation.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Shuhui Fan,Yanan Hu,Tan Zhang,Qiang Zhao,Jinping Li,Guang Liu
The synthesis of ammonia via electrochemical nitrogen reduction reaction (NRR) provides an attractive alternative approach to the traditional Haber-Bosch process. In this regard, a one-step hydrothermal method was adopted to synthesize a bimetallic oxide， ferric molybdate (Fe 2 (MoO 4 ) 3 ), coated with carbon black on the surface (denoted as Fe 2 (MoO 4 ) 3 /C). The carbon black coating minimizes aggregation of Fe 2 (MoO 4 ) 3 , leading to increased electrochemical active sites for NRR. Additionally, this coating improves the electrical conductivity of Fe 2 (MoO 4 ) 3 thereby accelerating electron transfer between carbon black and Fe 2 (MoO 4 ) 3 , which is beneficial to charge transfer and enlarge the electrochemical active surface areas. At a potential of −0.4 V RHE (vs. reversible hydrogen electrode , RHE), the ammonia yield achieved was up to 51.76 μg h −1 mg cat −1 , with a Faradaic efficiency of 90.63% at −0.35V RHE . Impressively, this electrocatalyst exhibited excellent cycle stability and durability.
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ELECTROCHIMICA ACTA
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2023
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IF 6.6
Haoqiang Ma,Chenxin Jin,Guojun Xu,Lijun Wen,Chuanbin Tu,Fugen Sun,Yong Li,Lang Zhou,Zhihao Yue
Silicon-carbon composites are considered as the most promising anode materials for lithium ion batteries . Currently, most silicon-carbon composites were prepared by solid nano‑silicon particles as the silicon source, which suffers from high price and uneven dispersion. Here, we used tetraethyl orthosilicate as the liquid silicon source and polyvinylpyrrolidone as the carbon source. Both were homogeneously mixed in the liquid phase, and then processed through electrospinning, carbonization and nitrogen-doped processes to obtain free-standing nitrogen-doped carbon coated silicon monoxide (N-doped C/SiO x ). When served as anode material, N-doped C/SiO x can possess a reversible capacity of 488 mAh g −1 at 0.5 C (0.6 A g −1 ) and 377 mAh g −1 at a high current density of 2 C (2.4 A g −1 ). In addition, copper foil is not used as a collector for free-standing electrode structure, and eliminates the coating process of traditional electrodes, which reduces production costs. It is proposed that a facile strategy to fabricate silicon-carbon composites with good electrochemical properties and cost-effective way for lithium ion batteries.
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