TALANTA
·
2024
·
IF 5.6
Yanli Lei,Xinyan He,Yu Zeng,Xinyu Wang,Le Yang,Xiaowen Liu,Zhihe Qing
Gold nanoparticles (Au NPs) have been widely utilized in developing DNAzyme-functionalized nanosensors, most of which were engineered by attaching the thiolated DNAzymes to Au NPs via Au-S bonding. However, the Au NP-DNAzyme nanosensors always suffer from signal distortion when applied in complex environment with abundant thiols, which poses challenge for practical applications. Here, we focus on addressing the root cause of the issue and propose to decorate the Au NPs with a thin layer of platinum, thus facilitating the conjugation of DNAzymes through Pt-S bonding, a thiol-resistant cross-linking. The Pt-S bond stabilized DNAzyme nanosensor effectively minimized false positive signals when detecting L-histidine in infant formulas, as compared to the Au-S stabilized counterpart. This innovative strategy holds promise for high-fidelity biosensing, improving the practical applicability of Au NP-based DNAzyme nanosensor.
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ChemistrySelect
·
2025
·Vol. 10
·期 36
·e04484
·
IF 2
Xiaoqian He,Peicheng Jiang,Qilin Wang,Xinyi Luo,Shu Chen
Organic water pollution poses a global challenge. The unique properties of transition metal carbides (MXenes) make them ideal candidate adsorbents for removing water contaminants. However, limitations in the types and quantities of surface functional groups on MXenes, coupled with their inherent instability, have restricted their application in adsorbing organic dyes such as methyl blue. This study prepared sulfur–nitrogen co-doped MXenes (S─N─MX) through thermal annealing co-doping of MXenes with thiourea. This method successfully introduced sulfur and nitrogen elements as functional groups into the MXene structure, increasing the variety and quantity of surface functional groups and significantly enhancing the number of active sites. This process effectively suppresses nanolayer stacking, enhances structural stability, and substantially increases the material's adsorption capacity. Langmuir adsorption isotherm measurements reveal a maximum adsorption capacity of 239.8 mg·g −1 at 298 K and pH = 9. The material achieves efficient adsorption of methylene blue through electrostatic interactions, Lewis acid–base interactions, and hydrogen bonding. The incorporation of sulfur and nitrogen elements provides a protective effect, ensuring the composite adsorbent maintains excellent stability during adsorption–desorption cycles. After five adsorption-desorption cycles, its adsorption capacity retained over 85%. Graphical S–N co-doped MXene is synthesized via thermal annealing with thiourea, which introduces abundant surface functional groups and enhances active sites. This adsorbent exhibits a high methylene blue adsorption capacity of 239.8 mg·g - 1 through electrostatic attraction, Lewis acid–base interaction, and hydrogen bonding. It also demonstrates excellent recyclability, retaining over 85% efficiency after five cycles.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Haitao Wang,Hong Zhu,Zhenggang Bu,Kai Dan,Chaofeng Shen,Liping Lou
Co-doping with non-metallic and metallic elements offers an effective strategy to address the inherent limitations of zero-valent iron (ZVI) materials, including low reactivity and selectivity towards target contaminants and surface passivation. This study synthesized high-performance sulfur-nickel co-doped microscale ZVI (S-Ni-mZVI) through a facile and cost-effective one-step ball milling method to achieve high dehalogenation activity. A comprehensive comparative analysis between mZVI, S-mZVI, and Ni-mZVI revealed the superior trichloroethylene (TCE) degradation kinetics, electron efficiency, pH tolerance, and long-term activity of S-Ni-mZVI. Specifically, S-Ni-mZVI achieved a pseudo-first-order TCE degradation rate constant of 1.05 h −1 (>97 % removal in 4 h), outperforming mZVI by 150.9-fold, and exhibited an electron efficiency of 70.7 %. Mechanistically, S (FeS) effectively suppressed hydrogen evolution (up to 99.3 % inhibition) and passivated Ni-induced hydrogenolysis, and Ni (Ni-Fe galvanic couple) augmented the electron cloud density of sulfur and synergistically promoted electron transfer in conjunction with FeS, resulting in a 6.4-fold rate acceleration. Furthermore, the co-doping of S and Ni induced Fe⁰ lattice contraction, significantly enhancing the material’s corrosion resistance. Additionally, S-Ni-mZVI exhibited broadened pH adaptability and sustained long-term degradation performance, maintaining a TCE removal rate exceeding 98 % over 13 days. Moreover, the leaching concentration of Ni remained consistently below 0.2 mg·L −1 , confirming the environmental friendliness of the material. Electrochemical analysis and kinetic isotope effect studies further revealed that Ni-mZVI degraded TCE primarily via hydrogenolysis. In contrast, S-mZVI and S-Ni-mZVI mainly employed direct electron transfer ( β -elimination). This work offers a pragmatic and scalable strategy for engineering highly active, electron-efficient, and durable ZVI-based materials for efficient remediation of chlorinated hydrocarbons.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2019
·
IF 3.571
Wei Wang,Chao Hu,Xin-Ru Li,Xiao-Qi Wang,Xue-Qing Yang
Little is known about the role of specific delta GST genes in the detoxification of lambda-cyhalothrin in the global quarantine fruit pest codling moth, Cydia pomonella (L.). Real-time quantitative PCR shows that CpGSTd3 was ubiquitously expressed at all developmental stages and is most abundant in the larval stage and lowest in the egg stage; the mRNA level of CpGSTd3 is higher in the midgut and Malpighian tubules of fourth-instar larvae and abdomens of adults than in other tissues. Exposure of fourth-instar larvae to an LD10 dosage of lambda-cyhalothrin significantly induced the transcript of CpGSTd3 at 3 h, but the mRNA level was down-regulated after 12 h of treatment. Recombinant CpGSTd3 expressed in Escherichia coli was able to catalyze the conjugation of 1-chloro-2,4-dinitrobenzene (CDNB) and with an IC50 value of 0.65 mM for lambda-cyhalothrin. Metabolism assays indicate that recombinant CpGSTd3 could metabolize lambda-cyhalothrin. These results suggest that CpGSTd3 is probably a lambda-cyhalothrin metabolizing GST in C. pomonella.
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ChemSusChem
·
2020
·Vol. 13
·期 7
·1906-1914
·
IF 7.962
Yuqi Ke,Jingzhu Zhang,Yuanbang Xie,Qiwei Yang,Qilong Ren,Huabin Xing
Graphical Flex those ABSs : Aqueous biphasic systems (ABSs) based on poly(ionic liquid)s (PILs) were designed and used for the extraction of bioactive compounds. Extraordinary partition coefficients were achieved by customizing the structure of the PILs. The performance of the PIL-based ABSs was tuned by changing the molecular weight and anionic character of the PIL. Ionic liquid (IL)-based aqueous biphasic systems (ABSs) provide a sustainable and efficient alternative to conventional liquid–liquid extraction techniques and can be used for the extraction, recovery, and purification of diverse solutes. However, the construction of a high-performance ABS that has both excellent phase separation ability and extraction performance remains challenging. This study concerns the preparation of a family of novel ABSs based on poly(ionic liquid)s (PILs) with customized structure and controllable molecular weight for the extraction of bioactive compounds. Several tailor-made PILs consisting of a hydrophobic backbone, hydrophilic imidazolium pendant groups and strong hydrogen bonding basic counteranions are prepared by reversible addition fragmentation chain-transfer polymerization. The PILs have a perfect balance of hydrophobicity/hydrophilicity and functionality, affording outstanding phase separation, which was better than with either the IL monomer poly(1-butyl-3-vinylimidazolium bromide ([BVIm]Br) or the normal free-radical polymer P[BVIm]Br*. More importantly, PIL-based ABSs exhibited unprecedented high partition coefficients for six bioactive compounds including tryptophan, phenylalanine, and caffeine, as well as high extraction yields. The performance of the PIL-based ABSs could also be tuned by changing the molecular weight and anionic character of the PILs. This work shows that tailor-made PIL-based ABSs are a promising platform for bioactive compound extraction and provides significant clues for the design of new ABSs for various applications.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Liyang Zhou,Aixue Bi,Xu Yang,Feng Xue,Shengui Ju
Titanium-based lithium-ion sieves (LISs) have attracted considerable attention because of their superior adsorption capacity and cycling stability in lithium ion extraction. In this paper, an S-doped H 2 TiO 3 -ferrite ion sieve was successfully synthesized through co-precipitation scheme. The recycling problem of lithium ion sieve powder was effectively solved by utilizing its magnetic separation property. LTSO-Ferrite was prepared in one step using a high-temperature solid-phase method, with an optimal molar ratio of FeCl 2 : TiS 2 : TiO 2 = 0.2: 0.2: 1. The adsorption capacity of S-doped H 2 TiO 3 -Ferrite (HTSO-Ferrite) reached 43.02 mg/g, and the magnetization value was 4.81 emu/g. The adsorption energy and structure of Li + on LTSO-Ferrite were determined using density functional theory (DFT) to assess the feasibility of lithium absorption. The adsorption behavior of LTSO-Ferrite toward Li + followed the Langmuir isotherm and pseudo-second-order kinetic models, indicating that the adsorption was endothermic and spontaneous. LTSO-Ferrite exhibited good selectivity for heteroatoms in simulated brine. Magnetic recovery rate remained at 98 % with an adsorption capacity of 36.16 mg/g after five cycles, which is 84 % of its maximum adsorption capacity. LTSO-Ferrite exhibited magnetic separation properties, offering a promising approach for developing lithium adsorbents for extraction from unsalted lake brine.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Nan Li,Yuhua Niu,Wengang An,Zonghang Liu,Fangyi Ruan,Guodong Fan
In this study, AgBr/Bi 4 Ti 3 O 12 /Bi 2 Sn 2 O 7 (ABr/BTO/BSO) composites were successfully synthesized to facilitate multi-channel fast charge transfer. This directs the charge carriers to travel along multichannel pathways and suppresses carrier recombination. The mechanisms underlying charge transfer in the dual S-scheme heterojunction composites were elucidated using density functional theory (DFT) and in situ irradiated X-ray photoelectron spectroscopy (ISI-XPS). Furthermore, electron spin resonance (ESR) and burst experiments verified h + , ·O 2 - , and ·OH as the primary active species in the catalytic process. The ABr/BTO/BSO composites demonstrated exceptional photocatalytic redox capabilities, completely degrading rhodamine B (RhB) and achieving degradation rates of 77.21% for tetracycline (TC) and 81.04% for Cr (VI). Both experimental and theoretical analyses confirmed the intrinsic efficacy of photo-induced electron movement within the composites. This research introduces innovative design concepts and strategies for the advanced exploration of electron channel transfer in ABr/BTO/BSO ternary composites and the development of novel composite photocatalytic systems.
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RSC Advances
·
2024
·Vol. 14
·期 38
·27789-27798
·
IF 3.9
Zhipeng Xu,Yongliang Qin,Dongdong Wei,Jie Jin,Long Zheng,Jie Xu,Hui Liu,Ranran Chen,Di Wang
The study of the magnetism of tightly arranged nitronyl nitroxide (NN) radicals via Au–S self-assembly is interesting. In this study, a series of radicals (S-NN, D-NN, BS-NN, BD-NN) along with two types of nanomaterials (S-NPs, D-NPs) were synthesized. NN was chosen for the magnetic units. Their structures have been successfully synthesized and analyzed. The spin magnetic properties were characterized by electron paramagnetic resonance (EPR) and superconducting quantum interference device (SQUID) measurement. The analysis revealed that the self-assembled NN formed via Au–S bonds exhibits high packing density. Furthermore, it was gratifying to observe that the AuNPs exhibit ferromagnetism after the surface modification by NN. This results in strong ferromagnetic exchange interactions of S-NPs and D-NPs : JS-NPs = +279.715 K and JD-NPs = +254.913 K, respectively.
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Journal of Energy Storage
·
2025
·
IF 9.8
Chenglin Wei,Mengdi Sun,Baoguo Zhang,Zhangyong Yan,Zihao Dang,Yongkang Xu,Lin Wu,Ya Hu
Benefiting from the low cost and natural abundance of sulfur, as well as its excellent theoretical performance metrics - including a capacity of 1675 mAh g −1 and an energy density of 2600 Wh kg −1 - lithium-sulfur (Li-S) batteries have attracted considerable attention for next-generation energy storage. However, their practical deployment is severely hindered by the intrinsic shuttle effect of lithium polysulfides (LiPSs), which leads to the loss of active materials and poor cycling stability. In this work, we report a facile hydrothermal-calcination strategy to synthesize porous nanosheet-structured Fe-doped nickel oxide (Fe-NiO) as a functional separator modifier for Li-S batteries. The polar nature of NiO enables strong chemical interactions with LiPSs, effectively anchoring polysulfides on the cathode side and suppressing the shuttle effect. Furthermore, Fe doping significantly increases the density of surface active sites, thereby enhancing the adsorption and catalytic conversion of LiPSs into insoluble Li 2 S 2 /Li 2 S species, which promotes redox kinetics and mitigates capacity fading. When applied to Li-S cells, the Fe-NiO-modified separator markedly improves the electrochemical performance, delivering a high reversible capacity of 1150 mAh g −1 at 0.2C, an excellent rate capability of 505 mAh g −1 at 5C, and outstanding long-term stability with a minimal capacity decay of 0.091 % per cycle over 500 cycles at 1C. This study presents a simple and scalable strategy for separator engineering, providing a promising pathway toward high-performance Li-S batteries.
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Oxidative Medicine and Cellular Longevity
·
2022
·
IF 7.31
Yuan Liang,Jingqi Zhao,Haoyang Zou,Jie Zhang,Tiehua Zhang
As the main active ingredients of Panax ginseng, ginsenosides possess numerous bioactivities. Epidermal growth factor receptor (EGFR) was widely used as a valid target in anticancer therapy. Herein, the EGFR targeting activities of 20(S)-ginsenoside Rh2 (20(S)-Rh2) and the relationship of their structure-activity were investigated. Homogeneous time-resolved fluorescence assay showed that 20(S)-Rh2 significantly inhibited the activity against EGFR kinase. 20(S)-Rh2 was confirmed to effectively inhibited cell proliferation in a dose-dependent manner by MTT assay. Furthermore, quantitative real-time PCR and western blotting analysis revealed that 20(S)-Rh2 inhibited A549 cells growth via the EGFR-MAPK pathway. Meanwhile, 20(S)-Rh2 could promote cell apoptosis, block cell cycle, and reduce cell migration of A549 cells, respectively. In silico, the result suggested that both hydrophobic interactions and hydrogen-bonding interactions could contribute to stabilize their binding. Molecular dynamics simulation showed that the side chain sugar moiety of 20(S)-Rh2 was too flexible to be fixed at the active site of EGFR. Collectively, these findings suggested that 20(S)-Rh2 might serve as a potential EGFR tyrosine kinase inhibitor.
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JOURNAL OF NON-CRYSTALLINE SOLIDS
·
2025
·
IF 3.5
Yuxin Shao,Chengwei Gao,Yanqing Fu,Shiliang Kang,Linling Tan,Baoan Song,Shixun Dai,Changgui Lin
Superionic β -Ag 2 S demonstrates exceptional ionic conductivity and ductility, rendering highly promising for applications in electrochemical sensors, thermoelectric devices and solid-state electrolytes. However, it is still haunted by the limited thermodynamic stability, transitioning to the poorly conductive α -Ag 2 S phase upon cooling to room temperature (RT). Herein, a solid solution formed by partial isovalent substitution of sulfur with tellurium stabilizes the superionic phase via the substantial atomic-size mismatch between S and Te. Specifically, Ag 2 S 1-x Te x (0.2 ≤ x ≤ 0.8) maintain superionic phase at RT without observable phase transition upon cooling. This stabilized superionic phase originates from the substantial size mismatched between S and Te. Furthermore, the anion disorder caused by the local volume expansion introduced by large-radius Te reduces the activation energy the activation energy barrier and provides more vacancies for Ag + ion transportation. This work confirms the efficiency of crystal amorphization strategy for stabilizing high-temperature superionic phases at ambient conditions, enabling the development of superionic conductors.
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Chemistry-An Asian Journal
·
2025
·
IF 3.3
Xingru Chen,Longhui Nie,Xueling Li
Doping is an effective way to improve the separation efficiency of photogenerated carriers, widen visible light adsorption, and tune the band structure of carbon nitride (g-C 3 N 4 , CN). Herein, Na, S co-doped CN (CNNS- x ) photocatalysts were successfully prepared by a one-step thermal polymerization method using urea and sodium thiosulfate as the raw materials. The incorporation of Na and S not only improves the visible light response intensity and photogenerated carrier separation efficiency of CN but also enhances oxygen adsorption capacity and optimizes the energy band structure of the CN. The optimal CNNS-2.5 photocatalyst revealed a significantly enhanced photocatalytic performance and yielded 4.85 mM (24.25 mmol·g −1 ·h −1 ) H 2 O 2 in 1 h under visible light irradiation. The above yield is 4.71 times that of CN. It also revealed good stability in four cycles. The active species capture test and ESR revealed that the photocatalytic mechanism for H 2 O 2 production on CNNS-2.5 was a two-step, single-electron oxygen reduction reaction (ORR) pathway.
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