ELECTROPHORESIS
·
2020
·Vol. 42
·期 4
·465-472
·
IF 3.081
Qiuyue Xu,Beibei Chen,Man He,Bin Hu
Ti (IV)-modified vinyl phosphate magnetic nanoparticles (Fe 3 O 4 @SiO 2 @KH570-PO 4 -Ti (IV)) was prepared for simultaneous extraction of multiple arsenic species, followed by high performance liquid chromatography (HPLC)– inductively coupled plasma mass spectrometry (ICP-MS) analysis. Inorganic arsenic (iAs), dimethyl arsenic acid (DMA), monomethyl arsenic acid (MMA), p -amino phenyl arsenic acid ( p -ASA), 4-hdroxyphenylarsenic acid (4-OH), phenyl arsenic acid (PAA), and 3-nitro-4-hydroxyphenylarsenic acid (ROX) were investigated as interest analytes. It was found that they were quantitatively adsorbed on Fe 3 O 4 @SiO 2 @KH570-PO 4 -Ti (IV) at pH 5, and desorbed completely with 0.1 mol/L sodium hydroxide solution. Enrichment factor of 100-fold was obtained by consuming 100 mL sample solution. Under the optimal conditions, the method combining MSPE with HPLC-ICP-MS presented a linear range of 1–5000 ng/L for seven arsenic species. The limits of detection were 0.39, 0.60, 0.23, 1.85, 0.54, 0.48, and 0.84 ng/L for DMA, MMA, p -ASA, iAs, 4-OH, PAA, ROX, with the relative standard deviations ( c = 10 ng/L, n = 7) of 3.6, 3.9, 5.5, 12.4, 6.1, 5.8, 5.0, respectively. The accuracy of the method was validated by analyzing BCR 627 Tuna fish. The application potential of the method was further evaluated by chicken muscle and liver samples. No target arsenic species were detected in these samples, and good recoveries (80.6–123%) were obtained for the spiked samples at low, medium, and high concentration levels.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2024
·
IF 10.8
Wei Chen,Juan Zheng,Yarong Fang,Yutao Wang,Jinpeng Hu,Yuhua Zhu,Xiaoxiao Zhu,Weihao Li,Qian Zhang,Chuanqi Pan,Baojian Zhang,Xiaofeng Qiu,Sibo Wang,Shuang Cui,Jinlong Wang,Jinsong Wu,Zhu Luo,Yanbing Guo
Typically, SO2 unavoidably deactivates catalysts in most heterogeneous catalytic oxidations. However, for Pt-based catalysts, SO2 exhibits an extraordinary boosting effect in propane catalytic oxidation, but the promotive mechanism remains contentious. In this study, an in situ-formed tactful (Pt–S–O)-Ti structure was concluded to be a key factor for Pt/TiO2 catalysts with a substantial SO2 tolerance ability. The experiments and theoretical calculations confirm that the high degree of hybridization and orbital coupling between Pt 5d and S 3p orbitals enable more charge transfer from Pt to S species, thus forming the (Pt–S–O)-Ti structure with the oxygen atom dissociated from the chemisorbed O2 adsorbed on oxygen vacancies. The active oxygen atom in the (Pt–S–O)-Ti active structure is a robust site for C3H8 adsorption, leading to a better C3H8 combustion performance. This work can provide insights into the rational design of chemical bonds for high SO2 tolerance catalysts, thereby improving economic and environmental benefits.
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Water
·
2022
·Vol. 14
·期 7
·1044
·
IF 3.53
Miao Deng,Keming Wu,Tao Yang,Deyou Yu,Gaojie Liu,Shuai Gong,Dongni Sun,Michal Petru
The Electro-Fenton (E-Fenton) technique has shown great potential in wastewater treatment, while the sustainable and continuing supply of Fe2+remains challenging. Herein, we demonstrate the construction of a novel E-Fenton system by magnetically decorating zero-valent iron (ZVI) onto a RuO2-IrO2/Ti (ZVI-RuO2-IrO2/Ti) electrode for high-efficient treatment of pharmaceutical wastewater, which is considerably refractory and harmful to conventional biological processes. By using ZVI as a durable source of Fe(II) irons, 78.69% of COD and 76.40% of TOC may be rapidly removed by the developed ZVI-RuO2-IrO2/Ti electrode, while the ZVI-RuO2-IrO2/Ti electrode using ZVI only reduces 35.64% of COD under optimized conditions at initial COD and TOC values of 5500 mg/L and 4300 mg/L, respectively. Moreover, the increase in BOD5/COD from 0.21 to 0.52 highlights the enhanced biodegradability of the treated effluent. The analysis of a simultaneously formed precipitation on electrodes suggests that the coagulation process dominated by Fe3+/Fe2+also plays a non-negligible role in pharmaceutical wastewater treatment. In addition, the monitoring of the evolution of nitrogen elements and the formation of by-products in the E-Fenton process verifies its great capacity toward those organic pollutants found in pharmaceutical wastewater. Our study offers a practical solution for enhancing the performance of E-Fenton systems, and effectively treating refractory pharmaceutical wastewater.Keywords:electro-oxidation;zero-valent iron;pharmaceutical wastewater;E-Fenton process
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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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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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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Ji Qi,Mingzheng Liao,Chao Wang,Zhiqiang Jiang,Ying Chen,Bo Liang,Qingbin Song
Indirect hydrogen production routes presented extensive compatibilities for distributed solid oxide fuel cell systems . Catalyst activity directly determines hydrogen production and profoundly affects the power generation . In this work, Ce 1-x M x NiO 3-λ (M = Al, Ti and Ca) were synthesized for hydrogen production from propane partial oxidation (POx). From the results, it indicated that the choice of catalyst compositions could directly affect the microstructure during the preparation process. Also, different Ce 1-x M x NiO 3-λ catalysts displayed distinctive carbon tolerance performances due to the different active particle sizes and surface properties of the catalysts. In general, the synthesized Ce 1-x M x NiO 3-λ catalysts showed higher hydrogen production than a commercial nickel cerium catalyst. From the observation of a SOFC test system powered by injecting the generated H 2 from catalytic propane POx reaction, the obtained power density of CNO–Al displayed an increase of 22.6% compared to the commercial nickel cerium catalyst. It was quite impressive that the equivalent hydrogen (160 ml/min) produced over CNO–Al and the obtained power density (482.6 mW/cm 2 ) of SOFCs were competitive while CNO–Ca presented an excellent stability with a better carbon tolerance performance for the long-term tests. The achievements of this work might offer a novel point of view for developing low-cost catalyst towards indirect hydrogen production for SOFC.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xueping Tan,Dongnan Guo,Yujie Wang,Wenli Xu,Xiaofang Hou,Junbo Zhang,Sicen Wang
Factor XIa (FXIa), a pivotal target in anticoagulant therapy, requires precise activity monitoring to assess coagulation status and bleeding risks. To address the limited sensitivity of conventional chromogenic methods, we developed a novel electrochemiluminescence (ECL) biosensor exploring the synergistic effects of MXene's superior conductivity and Prussian blue analogue's (PBA) large specific surface area. Transient absorption spectrometry was employed to determine the excited-state lifetime and to elucidate the functional role of MXene@PBA. Molecular docking and specificity constant analysis identified Mpr(mercaptopropionic acid)-TEARK-Fc(ferrocene) as an optimal peptide substrate. The MXene@PBA-enhanced biosensor quantifies FXIa-induced ECL signal changes via peptide cleavage, achieving a linear range of 1.0 × 10 −5 mIU/mL to 1 mIU/mL and an LOD of 3.7 × 10 −6 mIU/mL (S/N = 3) in human serum. Furthermore, the ECL biosensor demonstrated efficacy in FXIa inhibitor screening, firstly revealing salvianolic acid A and C as potent inhibitors (>60 % inhibition) and apigenin as a moderate inhibitor (~40 %). Molecular docking confirmed that these inhibitors competitively bind to FXIa's catalytic pocket (His57, Cys58, Ala190, Lys192, Ser195), overlapping with the substrate recognition site. This MXene@PBA-enhanced ECL biosensor establishes a robust strategy for both FXIa activity monitoring and therapeutic agent development.
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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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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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IONICS
·
2026
·
IF 3.4
Zhao Yang,Zhang Wang,Jia Qingbo,Wu Can,Wang Ding,Duan Jianguo,Zhang Yingjie
P2-type cathode materials with good rate performance show significant potential for sodium-ion batteries (SIBs), but their low theoretical capacity limits further development. Here, the Na₀.₇₂Cu₀.₂₁Mn₀.₆₇Li₀.₀₆Ti₀.₀₆O₂ cathode layered material is elaborately designed, and the oxygen redox reaction of the oxygen anions gradually shifts from O²⁻ to O₂⁻ via the synergistic modulation of Li⁺ and Ti⁴⁺, especially at a higher voltage, achieving high-capacity Co/Ni-free SIBs. Notably, the NCMLT electrode delivers a capacity of 127.1 mAh·g⁻¹ after 200 cycles at the 1 C, and attains an outstanding capacity retention of 89.86%. Additionally, the metal oxide cost of the synthesized material is relatively low. Thus, this work provides a new approach to design the cathode for high-performance SIBs and offers a value for further development.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yue Li,Junhao Zhou,Xiaoping He,Youzhou He,Jiajia Jing,Xingyan Liu,Siqi Li,Siping Wei
Under the global dual-carbon goal, photocatalysis technology is being employed as a green technology for NO removal and hydrogen production . However, the application of photocatalysts is often limited by the weak response to visible light and the low separation efficiency of photogenerated carriers. In this paper, we designed a simple and efficient photocatalyst Au@NM-125/PdTCPP for NO removal and hydrogen evolution . By adding PdTCPP molecule with excellent light absorption ability combine with MIL-125-NH 2 (Ti), the introduction of PdTCPP expands the absorption range of visible light. On the other hand, the introduction of Au NPs with surface plasmon resonance effect promotes electron transport between PdTCPP and MIL-125-NH 2 (Ti), thus greatly improving the photocatalytic performance. Compared with the NO removal efficiency of the original NM-125 (22.06 %), the NO removal rate of NM-125/PdTCPP was 63.72 %, while the NO removal rate of Au@NM-125/PdTCPP was the highest, reaching 73.23 %. What’s more, Au@NM-125/PdTCPP also demonstrated excellent hydrogen evolution performance (12.659 mmol/g, in 4 h), with a hydrogen evolution effect 2.14 times that of NM-125/PdTCPP (5.911 mmol/g, in 4 h) and 6.85 times that of the initial material NM-125 (1.848 mmol/g, in 4 h). Based on the results of UV-Vis spectroscopy, Mott-Schottky and XPS spectrum, we proposed a possible photocatalytic mechanism, the suitable band gap value of MIL-125-NH 2 (Ti) and PdTCPP makes them form a Z-scheme heterojunction , where electrons flow from PdTCPP to MIL-125-NH 2 (Ti), and Au NPs acts as an electron bridge to promote more electron transfer, thus improving the photocatalytic performance. It is a practicable strategy to achieve excellent photocatalytic performance by combining metalloporphyrin molecules as semiconductors directly with MOFs to form heterojunctions and adding Au NPs as electronic bridges, which is also valuable for environmental remediation and energy production.
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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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