Journal of Materials Research and Technology-JMR&T
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2026
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IF 7.3
Ming Zhang,Zhanbo Li,Zihao Li,Jingjing Xie,Weimin Wang,Zhengyi Fu
B 4 C–TiB 2 composites with enhanced mechanical properties were fabricated by a hydrolysis-based coating process, followed by ball milling with stainless-steel media, and consolidated by reactive hot pressing. Milling with 9Cr18 stainless-steel balls introduced Fe–Cr debris, which generated a liquid phase during sintering, promoting the formation of coarse, plate-like (Ti,Cr)B 2 solid-solution grains and a newly formed FeB phase. The optimal flexural strength of 745.7 ± 37 MPa is achieved, attributed to solid-solution strengthening and improved microstructural homogeneity. Meanwhile, the highest fracture toughness and Vickers hardness of 5.40 ± 0.28 MPa m 1/2 and 37.4 ± 1.3 GPa are achieved when the milling time is prolonged to 3 h, representing a 27% and 9.67% improvement, respectively, compared to the composites without ball-milling treatment. These results demonstrate that controlled introduction of Fe–Cr debris by stainless-steel ball milling enables simultaneous enhancement of flexural strength, fracture toughness, and hardness in B 4 C–TiB 2 composites through liquid-phase sintering.
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高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.2
Qianshuo Wang,Yanhao Dong,Tu Lan,Junke Ma,Yongzhi Shi,Shu Chen,Zhenwei Zhu,WEN WAN
Transition metal dichalcogenide (TMDC) flakes doped with aliovalent d-electron species provide an ideal platform for studying lithium extraction and intercalation. Drawing on design strategies for TMDC electrodes in rechargeable batteries, this work investigates Cr-doped TaSe2 (Cr0.1Ta0.9Se2) as a lithium-ion battery anode. Cr doping preserves the layered structure while introducing a dual reaction mechanism: an irreversible conversion reaction during the first discharge (contributing to high primary capacity) and a reversible intercalation process in subsequent cycles. Electrochemical tests show a high initial discharge capacity of 970 mAh g-1 at 32 mA g-1 with distinct voltage plateaus, along with stable cycling performance (222.4 mAh g⁻¹ after 500 cycles). Ex-situ XRD and XPS confirm structural evolution and Cr participation in the conversion reaction, consistent with mechanistic insights for rechargeable primary lithium batteries. This work demonstrates that targeted doping can effectively tailor TMDC electrochemistry, offering a promising route to high-capacity electrode materials with hybrid energy-storage mechanisms.
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高影响因子
LANGMUIR
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2026
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IF 4.4
Jianguo Bai,Yanchen Zhu,Linli Qin,Hao Ren,Muhammad Wajid Ullah,Huamin Zhai
The pervasive toxicity of hexavalent chromium (Cr(VI)) to aquatic life and humans urgently demands integrated platforms capable of simultaneous detection and remediation. Herein, a bifunctional platform (CMC/PEI/MIL-53(Fe)/Nap/CP) capable of simultaneous fluorescence detection and photocatalytic removal of Cr(VI) was constructed by in situ growing MIL-53(Fe) on a carboxymethyl cellulose/polyethylenimine (CMC/PEI) matrix grafted with naphthalimide and combining it with cellulose paper (CP). In situ growth ensures the uniform dispersion of active sites, while the paper-based design enhances processability and recyclability. The protonated amino groups of PEI enrich Cr(VI) through electrostatic interactions, while MIL-53(Fe) provides photocatalytic active sites through the Fe3+/Fe2+ redox cycle. Due to the synergistic effect of adsorption and photocatalysis, the removal efficiency reached 99% within 5 h, with a reduction rate of 96%, following pseudo-first-order kinetics (k = 0.9119 h–1). Compared to other recent studies, it offers an excellent removal performance. At the same time, the enrichment effect of PEI enhanced the interaction between Cr(VI) and the naphthalimide fluorophore, achieving a detection limit of 0.34 μM and a KSV of 8.73 × 103 M–1. The good selectivity for Cr(VI) was theoretically verified through simulations by using Materials Studio software (MS). This platform provides a practical bifunctional platform for efficient fluorescence detection and removal of Cr(VI), with broad application prospects in the fields of environmental monitoring and water treatment.
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PubMed
高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Bing Hou,Ling Wang,Fan Tian,Zhenhua Dang,Egamberdiev Elmurod Abduqodirovich,Donaev Sardor Burkhanovich,Akmalova Guzal Yupovna,Semencha Alexander Vyacheslavovich,Jingwen Pan,Lei Wang
Ce@C exhibited superior Cr(VI) and phenol adsorption capacity. • Cr(VI) and phenol possessed a synergistic adsorption effect in binary-component. • Phenol indirectly promoted the Cr(VI) reduction by reducing Ce(IV) to Ce(III). • Oxidized phenol increased the content of oxygen-containing functional groups in Ce@C. • Ce(III) formed complexes with phenol to enhance the phenol and Cr(VI) adsorption. Cerium-based adsorbent has unique advantages of variable valence and abundant oxygen vacancies for the adsorption of hexavalent chromium (Cr(VI)). However, complex water bodies contain organic pollutants such as phenol, and the adsorption performance and mechanism of cerium-based adsorbent for multiple components still need to be explored. Herein, cerium-based adsorbent (Ce@C) was synthesized to explore the single-component and binary-component adsorption properties of Cr(VI) and phenol. Compared with single-component adsorption, Ce@C exhibited excellent adsorption performance for Cr(VI) and phenol in multi-component, with maximum adsorption capacities reaching 55.74 and 89.34 mg/g respectively at 25 °C (C e(Cr(VI)) = 50 mg/L, C e(phenol) = 150 mg/L). Ce@C showed excellent regeneration performance, and Cr(VI) adsorption capacity remaining almost stable and phenol adsorption capacity increasing by 30.44% after 5 cycles. The adsorption capacities of Cr(VI) and phenol were 1.78 times and 1.42 times higher than that of the single-component system, respectively, demonstrating a significant synergistic enhancement effect. Mechanistic results indicated that phenol transferred electrons to Cr(VI) through Ce(III), facilitating the reduction of Cr(VI) to Cr(III) and increasing the content of oxygen-containing functional groups. The complex formed by Cr(III) and phenol enhanced the phenol adsorption, enabling the continuous adsorption of Cr(VI) and phenol. This study provides new insights into improving the removal performance of Ce-based adsorbents for Cr(VI) and phenol in composite systems, further expanding the application potential of Ce-based adsorbents in the treatment of actual wastewater containing Cr(VI) and phenol. Download: Download high-res image (172KB) Download: Download full-size image
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
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IF 4.4
Yanqing Yang,Yuchen Yang,Zhixian Du,Weike Zhang,Jin Liu
A Z-scheme BiOBr/COF-1 heterojunction was synthesized via a solvothermal method. • The catalyst exhibited enhanced visible-light absorption and charge separation. • A mechanism for the simultaneous removal of RhB and Cr(VI) was revealed. The construction of heterojunctions is commonly employed to boost the separation efficiency of photogenerated charge carriers and the overall photocatalytic performance. In this study, a novel Z -scheme BiOBr/COF-1 heterojunction photocatalyst was synthesized via a facile solvothermal method. Comprehensive characterization confirmed the effective formation of the heterojunction, which exhibited enhanced visible-light absorption and improved separation efficiency of photogenerated charge carriers. Compared with pristine COF-1 and BiOBr, the optimized BiOBr/COF-1 composite (BC-1) demonstrated superior photocatalytic activity for both rhodamine B (RhB) degradation and Cr(VI) reduction. Notably, the reduction efficiency of Cr(VI) was significantly enhanced in a coexisting system of RhB and Cr(VI). In addition, BiOBr/COF-1 exhibited good structural stability over multiple reaction cycles. This work provides an effective strategy for designing Z -scheme photocatalysts to treat complex wastewater containing organic and heavy metal pollutants. Download: Download high-res image (339KB) Download: Download full-size image
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122565
·
IF 7.5
Cheng Yu,Xuantong Li,Chenchen Qu,Chunhui Gao,Yichao Wu,Jiangrong Xiao,Ke Dai,Peng Cai,Qiaoyun Huang
Environmentally persistent free radicals (EPFRs) can interact with various soil components and drive biogeochemical cycles. However, few studies have investigated the mechanisms by which EPFRs promote extracellular electron transfer (EET). The effect of fulvic acid and iron-bearing minerals on the Cr(VI) bioreduction by MR-1 was investigated. The electrochemical characterization, intracellular reactive oxygen species (ROS) detection and transcriptomic analysis of function genes were selected to explore the EPFRs-mediated EET by Shewanella oneidensis MR-1 (MR-1) and the expression of genes related to Cr(VI) bioreduction. Kinetic experiments showed that fulvic acid significantly enhanced Cr(VI) bioreduction by both MR-1 and the ΔomcA/mtrC mutant. Moreover, in the presence of iron-bearing minerals and fulvic acid, Cr(VI) bioreduction by MR-1 was greater than that by the ΔomcA/mtrC and ΔcymA mutants. Thus, fulvic acid acted as an electron shuttle in EET via metal-reducing pathways. Electron paramagnetic resonance spectroscopy and GO enrichment analysis revealed that nitrogen-centered EPFRs in fulvic acid decreased intracellular ROS by promoting glutathione synthesis, thereby accelerating Cr(VI) bioreduction via intracellular reductase. Combined with heat map results, these findings indicated that decreasing intracellular ROS could upregulate the expression of cymA , fccA , and omcA . In the presence of iron-bearing minerals, fulvic acid also significantly decreased intracellular ROS. Furthermore, on the surface of iron-bearing minerals, nitrogen-centered EPFRs were transformed into oxygen-centered EPFRs, thereby facilitating electron transfer between outer-membrane cytochromes and iron-bearing minerals. These findings provide new insights into the EPFR-mediated electron shuttling model and exhibit implications for the remediation of Cr(VI) pollution.
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高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Kaipian Shi,Junfeng An,Yu Yin,Li Yin,Ziyu Rong,Jinyu Han,Shiyin Li
A stable XG-WAS@n-FeS slurry was constructed for simultaneous removal of Cr(VI) and TBBPA. • Xanthan gum enhanced slurry viscosity, stability, and oxidation resistance. • TBBPA was transformed through successive debromination reactions. • Coexisting contaminants influenced TBBPA removal through site competition. Nanoscale ferrous sulfide (n-FeS) is a promising reductant for water treatment, but rapid oxidation, particle aggregation, and poor transportability restrict its practical use. In this study, n-FeS was immobilized on alkali-modified waste activated sludge (WAS), and xanthan gum (XG) was added as a structural regulator. This approach produced a stable, shear-thinning XG-WAS@n-FeS slurry for the simultaneous removal of Cr(VI) and tetrabromobisphenol A (TBBPA). Carboxyl and hydroxyl groups contributed to the binding of FeS within the XG-WAS matrix, which helped establish a stable reactive interface. The slurry exhibited lower viscosity at higher shear rates, confirming its shear-thinning behavior. Increasing the XG concentration also improved sedimentation stability and oxidation resistance. Cr(VI) was completely removed at all tested concentrations. By contrast, TBBPA removal decreased from 81.93% to 53.19% as the Cr(VI) concentration increased from 20 to 80 mg L −1 . It also decreased from 92.49% to 58.99% when the TBBPA concentration increased from 5 to 20 μM. These concentration-dependent trends reflect the finite reducing capacity of the slurry and the preferential consumption of electrons by Cr(VI). Humic acid, Ca 2+ , Mg 2+ , and Cl − enhanced TBBPA removal to varying degrees, while Cr(VI) removal remained complete. XPS analysis showed that Cr(VI) was reduced and immobilized as Cr(III) species. HPLC-MS analysis revealed the stepwise debromination of TBBPA to BPA. These findings demonstrate that XG-WAS@n-FeS is a stable and effective slurry for treating water containing both Cr(VI) and TBBPA. Download: Download high-res image (190KB) Download: Download full-size image
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高影响因子
Small
·
2024
·
IF 13
Suyue Luo,Zhenzhong Liu,Xinran Yin,Zuopeng Lin,Shuo Zhang,Junfeng Chen,Minghui Guo
The severe deterioration of the marine ecosystem significantly negatively impacts the performance of solar-driven steam generation (SSG) and the quality of the obtained freshwater. Herein, a bifunctional Ag/MgFe 2 O 4 @SCW reactor with a sandwich structure is designed for efficient SSG and Cr(VI) reduction, which is constructed via in situ deposit Ag nanoparticles (NPs) and MgFe 2 O 4 onto surface carbonized wood (SCW). Owing to the advanced sandwich structure and strong interfacial interactions between each component, an ultra-high evaporation rate of 1.55 kg m −2 h −1 and the efficiency of 88.6% are achieved using Ag/MgFe 2 O 4 @SCW under 1 sun. The system exhibits the long-term evaporation performance in the simulated sewage and strong acid/base solutions along with water-harvesting capacity in outdoor solar desalination. The quality of distilled water after desalination of actual seawater and NaCl solutions with different concentrations meets the WHO-recommended drinkable water standards. Furthermore, Ag/MgFe 2 O 4 @SCW shows outstanding antibacterial property, self-desalting capacity, as well as reusability and structure stability. Most importantly, the fast carrier separation endows Ag/MgFe 2 O 4 @SCW with superior photocatalytic activity and Cr(VI) photoreduction of up to 96.1% after 180 min of illumination. The bifunctional Ag/MgFe 2 O 4 @SCW reactor provides an advanced synergistic mechanism for improving SSG and photocatalytic performance, while being promising for solar-powered production of clean water.
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PubMed
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Jiayuan Zhang,Zhenlong Liu,Yu Liu,Liping Jiang,Caixia Ma,Lei Yang,Zunyuan Xie,Jizhen Li,Guofang Zhang
Transition metal oxides exhibit inherent catalytic activity for ammonium perchlorate (AP) decomposition; however, their performance is limited by the scarcity of accessible active sites and low conductivity. Therefore, morphology-directed structural design and interfacial engineering are highly desirable. In this study, two-dimensional (2D) MCo 2 O 4 nanosheets ( M = Fe, Ni, Cu, and Cr) were synthesized via a thermal expansion method and subsequently combined with three types of carbon materials C x (C x = rGO, CNTs, and g-C 3 N 4 ) to construct 2D MCo 2 O 4 /C x composites. Structural analyses demonstrate that the intimate interfacial coupling between 2D MCo 2 O 4 nanosheets and carbon materials effectively suppresses restacking and establishes a continuous conductive network. More importantly, strong interfacial coupling enables effective electronic modulation at the heterojunction, resulting in an optimized charge distribution and enhanced interfacial electron transfer. Among all catalysts, 5 wt. % FeCo 2 O 4 /rGO-1 demonstrates the most notable catalytic activity for AP decomposition, reducing its peak temperature in the high-temperature decomposition stage by 137.4 °C and increasing its heat release by 736.33 J·g⁻ 1 . Electrochemical tests confirm that accelerated interfacial charge transfer enhances AP pyrolysis. Kinetic modelling, TG-FTIR-MS, and DFT calculations indicate that the 2D-2D heterointerface boosts the adsorption of the AP intermediate NH 3 and promotes its conversion into higher-valence NO 2 , while also accelerating electron transport and lowering the decomposition barrier. The synergistic effect between interfacial electron transport and the heterojunction promotes the rapid AP degradation. Based on these findings, a plausible catalytic mechanism for AP decomposition is proposed.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 15
·10173-10191
·
IF 4.4
Liu Zeng,Wu Fang,Zheng Liwei,Sun Xu,Xia Chenghui,Song Hongbing,Zhang Shuai,Qu Xiaofei,Shi Liang
Core–shell Bi 4 NbO 8 Cl@C plate-like heterostrutured photocatalysts were successfully prepared by one-step hydrothermal process, during which glucose solution exhibited reducibility and created amounts of oxygen vacancies for Bi 4 NbO 8 Cl, while a carbon layer was in situ deposited on Bi 4 NbO 8 Cl by glucose decomposition. The structure of Bi 4 NbO 8 Cl was stabilized and armored by the thickness-tailored C layer, which provides a superior performance in the removal of acidic Cr(VI)-contained contaminant water, and the optimal Bi 4 NbO 8 Cl@C achieved 373 folds than pristine Bi 4 NbO 8 Cl in photocatalytic Cr(VI) removal. Experimental results and density functional theory (DFT) calculations show that C layer is tightly coated on the surface of BNC. Furthermore, C–O covalent bonds, which act as electron transfer channels, are formed at the interface of BNC and C layer. This study provides an important reference for the synthesis of core–shell structured photocatalysts and the efficient removal of Cr(VI) from industry wastewater. Graphical
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
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IF 8.6
Xiaojie Zhang,Kangrui Ma,Hong Peng,Yuefa Gong,Yanjun Huang
Simultaneous removal of chromium(VI) oxyanions and heavy metal cations from contaminated water body is of great significance. In this work, a novel and bifunctional sorbent, imidazolium functionalized polysulfone/DTPA-chitosan composite bead (IMPSF/DACS) was successfully constructed by phase inversion method and applied for co-removal of Cr(VI) and Cu(II) from aqueous solutions. The maximum adsorption capacities for Cr(VI) and Cu(II) on IMPSF/DACS in single system at pH 5 were 56.72 and 43.05 mg g −1 , respectively. In binary system, the removal of Cr(VI) could be further enhanced by the presence of Cu(II) due to the electrostatic shielding effect, while Cu(II) sorption was not significantly affected by the coexistence of Cr(VI). Moreover, IMPSF/DACS could simultaneously reduce low concentrations of Cu(II) and Cr(VI) in simulated contaminated lake water below the limit, while also showing good reusability in co-removal of Cr(VI) and Cu(II). The order of inhibitory effect of competing anions on Cr(VI) removal was as follows: H 2 PO 4 − < Cl − < NO 3 − < SO 4 2− , while the competing hardness cations had a little effects on the adsorption of Cu(II), implying that the Cr(VI) removal was mainly depended on the electrostatic attraction between Cr(VI) and imidazolium ions modified on IMPSF/DACS, and Cu(II) uptake was associated with chelation of DACS encapsulated in IMPSF/DACS beads. These assumptions were confirmed by XPS, FTIR and EDS-mapping techniques.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2023
·
IF 5.2
Yuwen Gao,Shougui Wang,Fei Gao,Changqing Guo,Jipeng Dong,Guanghui Chen
The Li 1.6 Mn 1.6 O 4 driven lithium ion-sieve (LIS) is considered as a potential adsorbents for recovering Li + ions from brines owing to their good theoretical adsorption performance and excellent adsorption selectivity. However, the poor cycle stability and the decrease of adsorption capacity resulting from the manganese dissolution loss limit its practical applications. In this work, to mitigate this issue, several novel Al and Cr co-doped manganese LISs were prepared by a facile hydrothermal synthesis method, followed by the acid treatment. The characterization results show that Al and Cr ions are uniformly doped into the spinel crystal structure of LIS, and the introduction of Al and Cr ions can cause the crystal shrinkage, decrease the Mn 3+ content, and raise the mean valence of manganese in the co-doped samples, effectively improving their structural stability. Compared with un-doped ion-sieve H 1.6 Mn 1.6 O 4 , the optimal co-doped ion-sieve H 1.6 Mn 1.54 Al 0.02 Cr 0.04 O 4 with 2% Al doping and 4% Cr doping possesses a higher lithium adsorption capacity, lower manganese dissolution loss, and stronger cyclic stability. Additionally, the H 1.6 Mn 1.54 Al 0.02 Cr 0.04 O 4 possesses a high adsorption selectivity of Li + over Mg 2+ , Ca 2+ , K + and Na + . Furthermore, the lithium adsorption is determined to be a chemical and monolayer adsorption process on the prepared LIS. The good lithium adsorption capacity and adsorption selectivity as well as the good recyclability make the prepared Al and Cr co-doped LIS a promising adsorbent for the efficient lithium recovery form brines.
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高影响因子
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