Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Xiaoqin Li,Yuqi Su,Ronghai Bai,Qibin Li
Electrochemical oxidation (EO) effectively degrades phenolic compounds in phenol-containing wastewater, but the chlorinated byproducts generated during the process raised concerns. In this study, degradation efficiency of phenol and formation rules of chlorinated byproducts in the presence of chlorine (Cl − )were systematically and comparatively studied in two EO systems with boron-doped diamond (BDD) and ruthenium-iridium-coated titanium (RuO 2 -IrO 2 /Ti) as anodes. The results showed that Cl − significantly enhanced phenol degradation efficiency of the two anode systems. At the same Cl − concentration, degradation efficiency of BDD-EO was superior to that of RuO 2 -IrO 2 /Ti-EO, it had a higher apparent removal rate for phenolic compounds, including phenol, 4-NP, 4-CP, BPA, and RES, and was less affected by coexisting ions. However, in the BDD-EO system, the total amount of produced chlorinated byproducts (3.593 mM Cl) was approximately 50 times greater than that produced in the RuO 2 -IrO 2 /Ti-EO system (0.0723 mM Cl). These chlorinated byproducts included inorganic chloro-byproducts (ClO 3 − and ClO 4 − ) and organic chloro-byproducts (such as chloroform, trichloroacetic acid, and trichloroacetaldehyde). The results confirmed that HOCl generated by the oxidation of Cl − on BDD and RuO 2 -IrO 2 /Ti anodes through the • OH/direct electron transfer was the key active species for enhancing the phenol degradation and driving the formation of chlorinated byproducts. The toxicity assessment shows that the additive toxicity of inorganic chloro-byproducts in the RuO 2 -IrO 2 /Ti-EO system is approximately 1/57 that in the BDD-EO system, and the toxicity of organic chloro-byproducts is approximately 1/18. Selecting the appropriate anode is therefore critical to balance treatment efficiency with the need to minimize toxic chlorinated byproducts.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhiqiang Guo,Xinmiao Wu,Juanjuan Meng,Xinxin Li,Yuan Li,Liangliang Hu
MIL-101(Fe) has received more and more attention in wastewater treatment, and how to further improve its stability and sorption capacity has become a research focus. In this study, metal Mg was used to dope MIL-101(Fe) to construct Mg@MIL-101(Fe) with bimetallic sites, which was then mixed with NH 2 -MIL-125(Ti) to successfully fabricate Mg@MIL-101(Fe)/NH 2 -MIL-125(Ti) (MOM) bis-MIL composites. MOM not only contains a large number of sorption sites but also exhibits excellent stability and reusability, realizing efficient sorption of Pb(II) from aqueous solution. In addition, the sorption performance and mechanism of Pb(II) on MOM were investigated by the characterizations of SEM, BET, TG, XRD, FTIR and XPS, as well as the kinetic and thermodynamic analyses. The sorption of Pb(II) on MOM is in accordance with the Langmuir isothermal model and pseudo-second-order kinetic model. The maximum sorption capacity of Pb(II) on MOM derived from the Langmuir model fitting is 320.941 mg·g −1 . The sorption of Pb(II) on MOM is strongly affected by pH, but not by ionic strength, which indicates that MOM has good resistance to salt interferences. The strong complexation of carboxyl, hydroxyl and amino functional groups with Pb(II) is the main sorption mechanism of Pb(II) on MOM, and electrostatic interaction and ion exchange also contribute to the sorption. In conclusion, MOM has strong practical application prospects in the treatment of Pb(II)-containing wastewater.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Zhengfang Liang,Shuwei Xiao,Junhong Li,Guoli Zuo,Jihua Wei,Yuanxun Gong,Qianli Tang,Kai Zhang,Xianjiu Liao
Apurinic/apyrimidinic endonuclease 1 (APE1), a key enzyme in the base excision repair pathway, is frequently overexpressed in multiple cancers and has emerged as an important biomarker for early diagnosis and therapeutic response evaluation. In this work, a highly sensitive electrochemiluminescence (ECL) biosensor was developed for APE1 detection by integrating a PAM-regulated CRISPR-Cas12a activation mechanism with a multifunctional nanocomposite-modified electrode. A Ti₃C₂/AuNPs/CsPbBr₃ ternary nanocomposite was fabricated through ultrasonic assembly to provide enhanced conductivity, water stability, and probe-loading capacity. Meanwhile, a DNA duplex containing an AP site within the PAM region was engineered to regulate Cas12a activation through APE1-mediated cleavage and polymerase-assisted repair, thereby minimizing background interference and enabling highly specific signal generation. Ferrocene-labeled DNA tetrahedrons (TDNs) were further introduced as a spatially ordered probe scaffold to improve hybridization efficiency and facilitate Cas12a trans-cleavage–mediated signal release. This work presents three key innovations: (1) Construction of a Ti₃C₂/AuNPs/CsPbBr₃ nanocomposite that simultaneously enhances ECL stability, conductivity, and electron-transfer efficiency, addressing the inherent water-instability of perovskite emitters. (2) Coupling of a PAM-regulated APE1–KF repair mechanism with Cas12a activation to achieve highly specific AP-site recognition and selective signal generation. (3) Introduction of a TDN-based probe architecture that provides rigid spatial orientation and high-density probe loading, markedly improving hybridization efficiency and Cas12a trans-cleavage performance. Benefiting from these synergistic innovations, the biosensor achieves a detection limit of 6.28 × 10⁻⁸ U μL⁻¹ and a wide linear range (1 × 10⁻⁷ to 1 × 10⁻ 1 U μL⁻¹). The platform also demonstrates excellent specificity, reproducibility, and reliable performance in diluted serum, highlighting its promise for clinical and biochemical applications.
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MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2025
·
IF 7
Wei Feng,Jian Zhang,Ruxia Liu,Yong Xiao,Guoqiang Luo,Qiang Shen
Particle-reinforced composite fillers allow precise control of joint microstructure to enhance mechanical performance. However, traditional designs often reduce joint deformability and face issues like particle agglomeration and poor interfacial wettability. To overcome these limitations, a micro-network of Cu-Ti reinforcements within the brazing seam via Ag- x TiH 2 composite filler was developed in this work, which enabled the fabrication of high-strength Si 3 N 4 /Cu joints. Optimal results were achieved with the Ag-4TiH 2 filler, wherein a eutectic liquid formed at the Ag-4TiH 2 /Cu interface during the initial brazing stage. Simultaneously, undissolved Ti reacts with Cu to yield submicron Cu 4 Ti 3 -dominated reinforcements. On the Si 3 N 4 surface, hypostoichiometric TiN/TiN 0 . 61 /TiN 0 . 5 nanocrystals grow sequentially, which is beneficial for enhancing interfacial wettability and bonding reliability. A maximum average shear strength of 186.9 MPa was obtained, a 57.6 % improvement over the conventional AgCuTi filler. The fracture mechanism underwent a notable transformation: brittle failure at mixed regions of Si 3 N 4 and the reaction layer in AgCuTi joints was replaced by ductile failure at the interface between the Cu matrix and the brazing seam in Ag-4TiH 2 joints. The Cu 4 Ti 3 -dominated micro-network offers distinct advantages by enabling controllable in-situ growth that prevents agglomeration while maintaining joint deformability through the synergy effect of the abundant retention of ductile Ag(s, s) and decent elastic modulus and yield strength increment, and regulates the interface reaction to yield a thinner Ti-N layer instead of a TiN/Ti 5 Si 3 dual-layer. These features collectively contribute to the notable mitigation of residual stress within Si 3 N 4 /Cu joints.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Huilin Lun,Yi Zeng,Xiang Xiong,Houbu Li,Ziming Ye,Xiaoxu Liu
This work introduces fabricating single-phase ternary-anion carbide solid solution via solid-state diffusion of B and N. Initially, non-stoichiometric (Zr,Hf,Ti)C x with carbon vacancies was synthesized by modified spark plasma sintering. Then, using B 2 O 3 and g -C 3 N 4 as sources, (Zr 0.3 Hf 0.5 Ti 0.2 )(C 0.87 B 0.03 N 0.07 ) with face-centered-cubic structure was produced via B diffusion at 1100 °C and N diffusion at 1600 °C. Trace B (0.23 wt%) and N (0.71 wt%) in (Zr 0.3 Hf 0.5 Ti 0.2 )(C 0.87 B 0.03 N 0.07 ) was found to significantly enhance the oxidation resistance (higher onset temperature 520 ± 3 °C (particle size 2.5 ± 1.3 μm) than 475 ± 3 °C of (Zr 0.3 Hf 0.5 Ti 0.2 )C 0.85 and improve structural stability with more negative binding energy.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Qinzhi Wang,Yijian Zhao,Zhan Shi,Xinyu Sun,Tong Bu,Changqiu Zhang,Zexiang Mao,Xiaohan Li,Li Wang
Azo dyes in soft drinks present a serious risk to human health and are strictly limited in many countries. Herein, we demonstrate that covalent-organic framework (COF) can be facilely grown on magnetic metal–organic framework (MOF) to form three kinds of porous Fe 3 O 4 @MOF(M = Fe, Ti, Zr)@COFs composites for efficient azo dyes adsorption. Adsorption performances of Fe 3 O 4 @MOF(M = Fe, Ti, Zr)@COFs toward azo dyes were systemically investigated by adsorption kinetics , adsorption isotherms and adsorption thermodynamics. Under optimized conditions, the maximum adsorption capacities of both Fe 3 O 4 @MOF(Fe)@COF and Fe 3 O 4 @MOF(Zr)@COF for Congo red (CR) are 1250.02 and 625.13 mg g −1 , and the Fe 3 O 4 @MOF(Ti)@COF for Chrysoidine (CYD) is 294.12 mg g −1 , all which are higher than those of mostly previous reports. Furthermore, possible mechanisms of adsorption were revealed through Fourier-transform infrared spectra and X-ray photoelectron spectroscopy analysis. These Fe 3 O 4 @MOF(M = Fe, Ti, Zr)@COFs composites also present good biocompatibility, and exhibit high adsorption capacities for CR or CYD in soft drinks, which can be suggested as effective adsorbents for the azo dyes removal from soft drinks.
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CATALYSIS LETTERS
·
2016
·Vol. 147
·期 2
·502-508
·
IF 2.294
Chen Yao,Liu Cheng-chao,Zhang Yu-hua,Zhao Yan-xi,Wei Liang,Wen Xiong,Zhao Xin,Li Jin-lin
Abstract Hierarchically ZSM-5 zeolite was prepared by alkali treatment. It was used as a support for a series of Co-based catalysts for Fischer–Tropsch synthesis with Fe, Ti, Ga or Zn as promoter. This series of catalysts were named Co/M-ZSM-5 (M = Fe, Ti, Ga or Zn). The catalysts were characterized by SEM, XRD, H 2 -TPR, and XPS, and the FTS catalytic performance of catalysts were compared. The character date revealed that the promoter changed the dispersion, reducibility and stability of Co. The addition of Zn and Ga increased the activity of catalysts, decreased the selectivity to CH 4 . The Ti promoted catalyst had the highest initial activity, but it deactivated rapidly. The suitable interaction between Co and the Fe-ZSM-5 result in the suitable dispersion and reduction. Thus Fe is the better promoter for the catalyst Co/ZSM-5. Graphical Abstract
研究领域:
催化化学
·
材料科学
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9
Zishui Dong,Sinuo Li,Eldon R. Rene,Zhifei Meng,Weifang Ma
Fe-MXene catalyst featuring Ti/O dual vacancies and multiple active sites was directional designed and synthesized via Molten Salt Self-Assemble, which could realize 96.73% degradation and 77.45% mineralization to 20 mg/L benzotriazole (BTA) within 20 min with amendment of 0.5 g/L Fe-MXene and 15 mg/L O 3 at pH 7.0. The degradation rate attained 0.1836 min −1 with 2.6 times enhancement compared to single O 3 . This highly efficient degradation was ascribed to synergetic effects from 55.92% hydroxyl radicals (•OH), 28.3% superoxide radicals (•O 2 − ), and 9.24% singlet oxygen ( 1 O 2 ). These approximately fivefold •OH and threefold •O 2 − active species generation were attributed to superior catalytic activity from Fe-MXene with multivalent redox couples (Fe (II)/Fe (III), Ti (III)/Ti (IV)) and Ti O double vacancies, which enhanced O 3 and electron transport. Fe-Mxene catalyst efficiency maintained over 96% after 5 recycle. This efficient and stable degradation mechanism is mainly driven by Ti O double vacancies, which accelerated direct adsorption O 3 conversion to •O 2 − and indirect chemical generation •OH driven by Fe/Ti electron transfer acceleration. This generation of multiple oxidizing active species accelerated three types of ring-opening behaviors for BTA from hydroxy substitution on benzene ring, oxidation ring-opening of triazole ring, and assistive double bond rupture driven by non-radical pathway. This rapid benzene ring-open induced ecotoxicity reduction, while triazole ring degradation triggered ecotoxicity increase. The extensive application of Fe-MXene catalyst demonstrated that the highly efficient and selective characteristics to refractory coal chemical wastewater containing toxic benzene rings and azole rings.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Hailiang Li,Dechang Jia,Zhihua Yang,Yu Zhou
A facile heat treatment strategy suitable for TiB reinforced titanium matrix composites (TMCs) fabricated by selective laser melting (SLM) is proposed. The effects of boron modification and heat treatment on the microstructure and mechanical properties of the selective laser melted TMC samples were systematically investigated. The ultrafine ∼2 vol% TiB whiskers that formed in situ exhibited a much more homogeneous distribution in the matrix compared to that of conventionally processed composites containing similar volume fractions, further promoting the formation of fine equiaxed α-Ti grains throughout the matrix. An excellent combination of strength and fracture strain of 1428 MPa and 43.6%, respectively, was simultaneously achieved for the heat-treated TMC, in which the plasticity was improved by 126% over that of the as-fabricated composite (19.3%). This finding provides significant guidance for tailoring the microstructure in selective laser melted TMCs to achieve the desired mechanical properties.
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International Journal of Electrochemical Science
·
2023
·Vol. 6
·期 9
·4341-4354
·
IF 1.5
Zhiqiao He,Chengxiang Huang,Qiong Wang,Zhe Jiang,Jianmeng Chen,Shuang Song
A series of praseodymium modified Ti/SnO 2 -Sb/PbO 2 (Ti/SnO 2 -Sb/PbO 2 -Pr) electrodes were synthesized by doping PbO 2 with praseodymium and the effect of Pr doping on the electrode catalytic activity toward the anodic oxidation of the model dye C.I. Acid Black 194 (AB-194) was examined in aqueous solution. The electrocatalytic activity of a Ti/SnO 2 -Sb/PbO 2 electrode can be greatly improved by adding an appropriate amount of Pr into the PbO 2 layer. Accelerated life tests indicate that Pr doping also dramatically improves the stability of the Ti/SnO 2 -Sb/PbO 2 anode. The introduction of Pr enhanced the formation of oxygen vacancies and surface hydroxyl groups, resulting in better activity and stability of the Ti/SnO 2 -Sb/PbO 2 -Pr electrode. A possible degradation pathway of AB-194 during the anodic oxidation process is proposed based on hydroxyl radical attack of the organic reactant.
研究领域:
电化学
·
环境工程
·
材料科学
·
水处理
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Functional Materials Letters
·
2024
·
IF 1.2
Shenwei Zhang,Dongrui Chen,Wenmin Guo,Xiaoming Wang,Zhibin Ding,Xiaofu Tang,Junxia Zhang,Haijiang Wu,Diping Zeng,Hongqing Wei,Wenjun Wang,Yi Ma,Jinhua Zhou,Zaijun Su
This paper employs electrochemical methods (linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS)) to investigate the electrochemical behavior of platinum, glassy carbon, 304 stainless steel, titanium, and copper in 21 and 1 M LiTFSI electrolytes. The LSV results indicate that the electrochemical stability window of the materials varies with the electrolyte concentration, and the stability window is wider in the high-concentration system. Through Tafel polarization curves and EIS analysis, the overpotential of the charge exchange process differs due to the type of material and the concentration of the electrolyte, mainly attributed to the influence of the proportion of free water, electrolyte viscosity, and SEI film formation on electrode process kinetics. After comparative analysis, glassy carbon exhibits a higher overpotential than other materials at both the cathode and anode, effectively suppressing water decomposition. These findings provide theoretical support for the development of high-performance aqueous lithium-ion battery current collector materials.
研究领域:
电化学
·
储能
·
材料科学
·
电池技术
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Green Energy & Environment
·
2026
·
IF 14.6
Lijun Xiong,Dandan Zhu,Chenglong Qiu,Weihong Zeng,Mingshi Xu,Shanshan Wang,Yong Yang
The photocatalytic reduction of carbon dioxide (CO 2 ) into high-value C 2+ hydrocarbons represents a sustainable pathway to alleviate energy shortages and reduce atmospheric CO 2 levels. In this study, a unique tandem photocatalyst (CoTi-CN), is constructed by integrating bimetallic CoTi-MOF with metal-free half-metallic C(CN) 3 . This composite demonstrates markedly enhanced activity and selectivity in the photocatalytic CO 2 reduction to ethylene (C 2 H 4 ), achieving a C 2 H 4 selectivity of 36.8% and a generation yield of 31.3 μmol g −1 over 5 h. Density functional theory (DFT) calculations combined with in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) analysis reveal that C(CN) 3 acts as an efficient CO 2 to CO converter, while CoTi-MOF favors the adsorption and C-C coupling of *CO intermediates. The spatially decoupled CO generation and C-C coupling processes lead to optimized intermediate coverage and reduced energy barriers, resulting in superior selectivity toward multi-carbon products. This work opens new horizons for the design of tandem photocatalysts that combine half-metallic catalysts with bimetallic MOFs, achieving a significant enhancement in the activity and selectivity of photocatalytic C 2 H 4 production.
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