AQUATIC TOXICOLOGY
·
2015
·
IF 3.451
Hongxing Chen,Jinling Cao,Lixia Li,Xing Wu,Ran Bi,Paul L. Klerks,Lingtian Xie
Maternal transfer of metals can be an important exposure route for animals. The maternal transfer of Cr and its effects on reproduction in fish are still largely unknown. In this study, Japanese medaka were exposed to a sublethal Cr(VI) concentration for 6 days (acute) and for 3 months (chronic). Chromium accumulation in the gonads, maternal transfer of Cr, and effects of Cr on the reproduction, histopathology and expressions of antioxidants in the gonads were evaluated. Both acute and chronic exposures resulted in significant Cr accumulation in gonads, eggs and larvae. In chronic Cr-exposed fish, approximately 61% of the Cr accumulated in the ovary was depurated by spawning during the first 3 days after exposure, suggesting that maternal transfer is a very important pathway for accumulation in offspring. The chronic exposure caused decreases in body weight, standard length, gonad weight, gonad-somatic index (GSI) and fecundity. The last of these was most severely affected: the total number of broods and eggs per female decreased by 57.1% and 75.9%, respectively. Moreover, egg weight and fertilization rate were also reduced (by approximately 20%) following chronic Cr(VI) exposure. Histopathological analyses showed that the Cr exposure resulted in the onset of follicular atresia and a reduction in the number of mature oocytes, along with a reduction in abundance of mature spermatozoa in testes. The GSH/GSSG ratio was greatly elevated after chronic Cr(VI) exposure, implying that GSH played a role in scavenging the reactive oxygen species generated by the reduction of Cr(VI) inside cells. This study provides evidence for the maternal transfer of Cr, highlights the importance of spawning in Cr depuration from the ovary, and demonstrates that chronic Cr(VI) exposure has serious impacts on reproduction in the Japanese medaka. Our results suggest that the issue of chronic Cr pollution deserves more attention than it has received to date.
✓ 已验证
DOI
高影响因子
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
·
2026
·Vol. 103
·期 11
·103167
·
IF 3.4
Yu Zhang,Pengpeng Ding,Min Liu,Lifen Meng
Rapid and ultrasensitive detection of heavy-metal ions in aquatic environments is critical for ecological integrity and public health, however, achieving cost-effective and highly selective green fluorescent probes remains challenging. This work delivers notable novelty through a one-step nitrogen self-doping without extra nitrogen sources, dual sensing-antioxidant functionality, and superior detection limits (LOD) compared with homologous cabbage-based materials. A one-step hydrothermal approach was developed to synthesize nitrogen-doped carbon quantum dots (PC-CQDs) in situ, using purple cabbage as both carbon and nitrogen precursors. Structural, surface chemical, and optical properties were comprehensively characterized by TEM, XPS, XRD, FTIR, and fluorescence spectroscopy. PC-CQDs exhibit a pronounced and selective fluorescence response toward Cr(VI) with negligible interference from competing metal ions, and achieve a lower LOD compared with homologous cabbage-derived CQDs. Under optimized conditions, the Cr(VI) detection limit is 3.00 μg/L. In tap water, mineral water, and river water, spiked recoveries range from 97.00% to 100.50%. Additionally, PC-CQDs demonstrate strong scavenging activity toward hydroxyl and DPPH radicals, with a DPPH IC 50 of 0.37 mg/mL, indicating notable antioxidant potential—this dual sensing-antioxidant functionality is a key novelty of the work. Purple cabbage serves as a sustainable biomass precursor for the green synthesis of high-performance PC-CQDs, enabling a robust fluorescent sensing platform for rapid heavy-metal monitoring in complex environmental water matrices, together with antioxidant applications. The one-step N self-doping strategy without external nitrogen sources, combined with dual sensing-antioxidant function and superior LOD relative to cabbage-based counterparts, underscores the novelty and practical potential of this approach. Download: Download high-res image (360KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 4.4
Zeng Fanen,Xu Bing,Jing Chenglong,He Xiaodong,Li Chunyang,Li Guojun
High-entropy oxides (HEOs) have attracted considerable attention for energy storage applications because of their multi-principal synergistic effects and excellent structural stability. In this study, polyethylene glycol (PEG) was used as a surfactant to synthesize (CrMnFeCoNi) 3 O 4 HEOs by tuning the molar ratio of PEG to metal cations ( P / M ). The results show that PEG plays three roles during synthesis, serving simultaneously as a coordinating dispersant, a structure-directing agent, and an in situ porogen. The optimized HEO ( P / M = 4/5) exhibits a uniform nanoparticle morphology and a well-developed pore architecture, delivering a specific capacitance of 557.6 F g –1 . Kinetic analysis further indicates that its pseudocapacitive behavior is from a cooperative effect involving both capacitive-controlled and diffusion-dominated mechanisms. The assembled asymmetric supercapacitor device achieves an energy density of 64.2 Wh kg –1 at a power density of 375.3 W kg –1 and retains 81.3% of its capacitance after 10000 charge/discharge cycles. These outstanding electrochemical properties highlight the promise of PEG template (CrMnFeCoNi) 3 O 4 HEOs for advanced energy storage applications. Graphical abstract
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Sitian Zhu,Zhigang Xu,Qiang Shen,Chuanbin Wang,Lianmeng Zhang
In this study, Cr-ZrC composite coatings were fabricated for the first time via trivalent chromium (Cr(III)) electrodeposition, and the influence of current density on the microstructural evolution, microhardness, and tribological behaviors of the as-prepared coatings was systematically investigated. The results show that the composite coatings presented an amorphous matrix with uniformly dispersed ZrC particles, and an amorphous interface was observed between the Cr matrix and ZrC particles, which ensures robust interfacial bonding. The thickness of Cr-ZrC composite coatings and the content of ZrC particles both increase as current density rises. When the current density reached 20 A/dm 2 , the ZrC content attained a maximum of 15.55 vol% along with a coating thickness of 9.81 μm, and the coating prepared under this current density exhibited the highest microhardness of 1239.8 ± 20.7 HV, which was approximately 66.4 % higher than that of the pure Cr(III) coating (without ZrC incorporation). Tribological tests indicated that the Cr-ZrC composite coatings achieved optimal wear resistance at a current density of 16 A/dm 2 , with a friction coefficient of 0.43 and a wear rate of 9.75 × 10 −6 mm 3 ·N −1 ·m −1 under this condition. Collectively, these findings provide a critical theoretical and experimental basis for optimizing Cr-ZrC composite coatings and clarify the key regulatory mechanism of current density on their structure-property correlation.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2026
·
IF 6.6
Feifei Xia,Shudong Ye,Jinjin Zhang,Jinhua Wu
Chromium-contaminated soil remediation via bioleaching generates wastewater containing persistent organic-Cr(III) complexes, which pose significant challenges during the post-treatment process. This study developed an innovative ternary synergistic system integrating mixed heterotrophic/autotrophic denitrifying bacteria with zero-valent iron (Fe 0 ) for promoted organic-Cr(III) removal and stabilization. In the nitrate-modulated biotic-Fe 0 (NMB Fe 0 ) system, heterotrophic bacteria mediated organic acid degradation, resulting in Cr(III) ion liberation. Concurrently, autotrophic bacteria utilized cathodic hydrogen from iron corrosion to accelerate both Fe 0 corrosion and secondary mineral production (e.g., magnetite and green rust) for subsequent Cr(III) adsorption and immobilization. The integrated system achieved 78.5% organic-Cr(III) removal in 5 d, representing a 6.7-fold enhancement as compared to the abiotic-Fe 0 control. Statistical analysis revealed significant positive correlations between nitrate concentration, Fe 0 dosage, and removal efficiency within the biological adaptation range, confirming denitrification as the primary driving mechanism. Leaching toxicity and reoxidation assessments demonstrated superior environmental stability of immobilized Cr(III) by NMB Fe 0 . Mechanistic investigations indicated that the synergistic interplay between heterotrophic and hydrogen-autotrophic bacteria effectively inhibited both organic-Cr(III) complexation and Fe Cr passivation layer formation on Fe 0 surface. These findings provide a novel, efficient, and sustainable strategy for bioleaching wastewater treatment.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Wensheng Lei,Minglin Sun,Wenliang Zhang,Liuan Liang,Zhezheng Ding,Xiao Tang,Haonan Dai,Xiaomin Liu,Pengfei Qi,Yan Wang
The efficient and sustainable removal of hexavalent chromium (Cr(VI)) from wastewater is a critical challenge in environmental engineering. Herein, an ultra-stable and recyclable cellulose nanofiber-based composite membrane (CNF@MN@MX) was fabricated via vacuum-assisted filtration by integrating cellulose nanofibers (CNFs), indium-based metal-organic frameworks (MIL-68(In)-NH₂, MN), and Ti₃C₂Tₓ MXene (MX). The CNFs provide a robust structural scaffold, MN imparts visible-light photoactivity, and MX establishes a highly conductive network that facilitates charge separation and transport. Comprehensive structural and photoelectrochemical characterizations confirmed strong interfacial coupling among the three components, leading to enhanced electron mobility and light-harvesting capacity. The optimized CNF@MN@MX membrane (mass ratio CNF:MN:MX = 1:1:1) exhibited a specific surface area of 22.65 m 2 /g, a maximum Cr(VI) adsorption capacity of 17.79 mg/g, and nearly complete Cr(VI) reduction under visible-light irradiation. Notably, the membrane retained over 70% removal efficiency after 20 regeneration cycles and maintained excellent performance in the presence of common anions. Density functional theory (DFT) calculations revealed that MX incorporation lowered the Gibbs free energy of Cr(VI) reduction from −1.19 to −1.72 eV, confirming the thermodynamic advantage of MX-facilitated electron transfer. Furthermore, the CNF@MN@MX membrane efficiently purified simulated industrial effluents, yielding residual Cr(VI) concentrations below the regulatory limit. This work provides a robust design strategy for constructing conductive, photoactive, and recyclable membrane systems for advanced heavy-metal wastewater treatment.
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2020
·
IF 4.142
Mengmeng Tian,Aijun Han,Songhua Ma,Xufei Zhu,Mingquan Ye,Xin Chen
BaCr x Ti 1- x O 3 ( x = 0.05, 0.07, 0.12, 0.15) pigment powders were synthesized by acrylamide modified sol-gel technique. The characterization results suggest the average particle size of the synthetic samples distributes from 64.5 nm to 85.6 nm and the color turns from yellow to yellow-green. The charge transfer of Ti 3d ↔ O 2p and the Ti 3d ↔ Cr 3d are majorly responsible for the color change. The NIR solar reflectance of the BaCr 0.07 Ti 0.93 O 3 pigment is up to 82.46%. The application experiment shows that comparing to the pure ASA (acrylonitrile-styrene-acrylate), the NIR solar reflectance of the modified ASA sample is improved by 52%, the inner surface temperature and heat absorption of the modified ASA sample are reduced by 5.5 °C and 26.8% respectively, and the aging resistance performance is improved by 4 times. In conclusion, the Cr-bearing BaTiO 3 pigments unfold potential to improve the aging resistance of ASA plastics.
✓ 已验证
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2026
·
IF 6.6
Chuanlong Huang,Mengqi Hao,Shurun Yao,Lirong Wang,Gang Liu,Zhuo Wei
Bioreduction of Cr(VI) by Shewanella through extracellular electron transmission (EET) attracts increasing interest due to cytochrome c (cyts c ) system especially conductive flagella (“nanowire”) structure. The responses of bioreduction efficiency, “nanowire” growth, cyts c synthesis, and e (electron) transmission intensity through CymA→MtrA→MtrB→MtrC→OmcA (Route 1) and CymA→NapA→NapB (Route 2) to iron ion (Fe 3 + ) and nitrate (NO 3 - ) were evaluated. Results showed that Fe 3+ and NO 3 - of 1–1.5 mM significantly ( p < 0.01) enhanced bioreduction of Cr(VI) from 67% to 82% and 79%, respectively with promoted cyts c -mediated c onductivity (C p ). Both Fe 3+ and NO 3 - stimulated the growth of “nanowire” and synthesis of cyts c participating in EET with Fe 3+ showing stronger stimulation on Routes 1 while NO 3 - on Routes 2. The genes expression of cyts c on inner membrane (CymA), periplasmic space (NapA/NapB), and “nanowire” (MtrA/MtrB/MtrC, OmcA) show synchronous responses to Fe 3+ and NO 3 - . However, contents of mobile cyts c in extracellular polymeric substances (EPS) and structural cyts c in cell membrane showed inconsistent responses to Fe 3+ and NO 3 - . Overall, this study illustrated the regulation mechanism of e acceptors on cyts c- electron transmission system of Shewanella , which help improving the electrochemical efficiency on Shewanella and provide novel idea in chromium remediation strategy .
✓ 已验证
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2026
·Vol. 37
·期 9
·105408
·
IF 4.5
Xiaoying Huang,Mingliang Xiang,Xiao Jin,Min Nie,Wei Xu,Rie Umetsu,Qing Yang,Yanan Chen,Jun-Qiang Wang,Yan Zhang
With the rapid advancement of power electronics toward high-frequency and miniaturization, there is an urgent demand for soft magnetic composites (SMCs) that possess both high permeability and low core loss. Herein, a novel Cr-O&(Ni,Zn)Fe 2 O 4 synergistic hybrid insulation was synthesized on FeSiBCCr amorphous powders via sequential hydrothermal and chemical co-precipitation methods. The oxygen partial pressure during annealing was optimized using 0.8 wt.% carbon powder to enhance the crystallinity and magnetic properties of the ferrite insulating coating. The resulting SMCs exhibited a saturation magnetization ( M s ) of 140.0 emu/g and an effective permeability ( μ e ) of 35.03. Notably, the core loss P 50mT/1MHz was reduced to 2143.10 mW/cm 3 , which is 50.72% lower than that of the core sample prepared by using raw powder without ferrite insulating coating. This synergistic hybrid insulation effectively suppresses inter-particle eddy currents and reduces domain wall pinning, offering a high-performance solution for high-frequency power electronics.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Mengyue Gao,Zhiheng Li,Mengjie Liu,Ting He,Xiaolu Su,Yueting Zhao,Zhiqiao Zou,Yanxing Yao,Fengmei Jin,Zhihao Li,Lihua Wang
A dual-metal-site MOF nanozyme exhibits enhanced oxidoreductases-like activity. • DMS MOF nanozyme-based sensor shows high sensitivity in Cr(VI) detection. • The sensor shows excellent performance in dairy product samples. A dual-metal-site metal-organic framework (DMS MOF) nanozyme was developed for highly sensitive colorimetric detection of Cr(VI) in dairy products. DMS MOF nanozyme integrates trivalent iron nodes and iron-porphyrin ligands to mimic the multi-center natural oxidoreductases, with adjacent dual-metal centers synergistically enhancing catalytic activity. Steady-state kinetic analyses and Zeta potential investigations demonstrate that the DMS MOF exhibits significantly lower Michaelis-Menten constants and enhanced substrate affinity than single-metal-site MOFs. The proposed method based on DMS MOF nanozyme enables highly sensitive colorimetric sensing of Cr(VI) within merely 5 min, achieving a broad linear range from 0.50 ppb to 5.0 ppm and a limit of detection (LOD) of 0.36 ppb. Furthermore, the developed strategy has been validated in complex dairy products including pure milk, yogurt, and milk powder, yielding recoveries of 84.0–110% with RSD ≤2.10%. Thus, engineered DMS-MOF nanozymes with enhanced activity provide a cost-effective, reliable approach for heavy-metal detection in foods. Download: Download high-res image (173KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL REVIEW B
·
2022
·Vol. 106
·期 23
·235151
·
IF 3.908
Gaofeng Ding,Hongliang Wo,Yiqing Gu,Yimeng Gu,Jun Zhao
The recently discovered kagome metal $A{\mathrm{V}}_{3}{\mathrm{Sb}}_{5}$ ($A=\mathrm{K}$, Rb, Cs) with intertwined superconductivity and charge density wave (CDW) order has attracted considerable interest. Here we investigate the evolution of CDW and superconductivity in $\mathrm{Cs}{({\mathrm{V}}_{1\ensuremath{-}x}{\mathrm{Cr}}_{x})}_{3}{\mathrm{Sb}}_{5}$, where chromium substitution for vanadium introduces extra electron carriers. Our experiments reveal that the CDW order is gradually suppressed under chromium doping, which can be understood from the band structure modifications induced by electron doping. This highlights the importance of the van Hove singularities near the $M$ and $L$ points for CDW instability. The anomalous Hall effect that is coupled with CDW in ${\mathrm{CsV}}_{3}{\mathrm{Sb}}_{5}$ only appears in lightly doped $\mathrm{Cs}{({\mathrm{V}}_{1\ensuremath{-}x}{\mathrm{Cr}}_{x})}_{3}{\mathrm{Sb}}_{5}$ and vanishes at $x\ensuremath{\ge}0.06$ when the CDW order remains relatively strong. Unlike hole- and isovalent-doped $A{\mathrm{V}}_{3}{\mathrm{Sb}}_{5}$, where superconductivity is enhanced upon suppression of CDW, superconductivity is rapidly suppressed under chromium doping, pointing to a conventional $s$-wave pairing.
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 6
·125013
·
IF 7.5
Wenjie Guo,Yinghua Lan,Wenbing Wu,Jien Niu,Yanmei Chen,Wenlong Xiang,Juan Xu,Yanhui Zhang
By combining the sol-gel method with the coprecipitation synthesis strategy, a series of cadmium sulfide-based catalysts (MTiO x -CdS, where M = Ce, Co, Cu, Zn) were successfully prepared. Under simulated sunlight irradiation, the material exhibited efficient and stable degradation performance for ciprofloxacin (CIP). Remarkably, by constructing a Cr(Ⅵ)-mediated redox system, a significant leap in degradation efficiency from nearly zero to 90% was achieved for bisphenol A (BPA) and ibuprofen (IBU). Studies reveal that Cr(Ⅵ) plays a dual role in this system, acting as both an "electron bridge" and an "adsorption anchor": on one hand, it serves as an electron acceptor to significantly inhibit charge carrier recombination; on the other hand, it enriches pollutants through coordination effects, thereby synergistically enhancing electron transfer and interfacial reactions. This work not only presents a cost-effective and efficient strategy for the synthesis of MTiO x -CdS photocatalysts but also offers valuable insights into the development of novel photocatalytic systems aimed at the remediation of complex water pollution and energy conversion applications.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）