COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Zhaolei Zhang,Fengyan Fang,Pingping Zhang,Xiaokang Zhang,Hongchao Ma,Yanhui Wei
Efficient detection of 4- nitrophenol (4-NP) organic pollutant is always a very important issue due to the rapid development of chemical industry and the abuse of pesticides and so on. Here, we designed and synthesized a novel supramolecular fluorescent probe , 4-[4-(acetylamino)styryl]-1-cyclodextrin pyridinium p-toluenesulfonate (ASPT-β-CD), for the selective and sensitive detection of 4-NP. The introduction of β-CD not only improves the water solubility of probe and can also be used as a host to encapsulate 4-NP. In alkaline aqueous solution, the absorption spectrum of 4-NP overlaps the excitation spectrum of ASPT-β-CD and suggests that an internal filtration effect occurs between them. We explored the possible response mechanism and speculated that the high selectivity and high sensitivity were derived from the synergistic effect of inner filtering effect and host-guest interaction. Benefiting from the synergistic effect, the proposed sensor ASPT-β-CD displayed significant "turn-off" after adding 4-NP, while showing a fast response to 4-NP within 2 min and low LOD about 0.01 μM. In addition, this method has been successfully applied to the determination of 4-NP in lake water samples, indicating that the obtained ASPT-β-CD has great practical application potential in the environmental field.
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PEST MANAGEMENT SCIENCE
·
2026
·
IF 4.2
Wanwan Wang,WenTao Tang,Haiyun Rui,Qing Gao,Yichen Feng,Long Xu,Yonggen Lou
BACKGROUND Chemical elicitors offer a promising strategy for sustainable pest control by activating plant defense responses. The elicitor 4-fluorophenoxyacetic acid (4-FPA) induces resistance in rice against the white-backed planthopper (WBPH; Sogatella furcifera ) by triggering deposition of phenolic polymers that form a physical feeding barrier. However, whether piercing-sucking insects possess counter-defense strategies against such elicitor-induced resistance remains unknown. RESULTS We found that infestation by gravid WBPH females (WBPH-GF) systemically suppressed 4-FPA-induced phenolic polymer deposition without degrading pre-formed deposits, thereby restoring nymph survival. Metabolomic analysis revealed that WBPH-GF reprogrammed 4-FPA metabolism from side-chain cleavage to 4-fluorophenol toward conjugation with l -aspartic acid and l -glutamic acid, with the 4-FPA-aspartate conjugate increasing approximately 56-fold. This shift correlated with up-regulation of the amide synthetase gene OsGH3.8 and maintenance of aspartate and glutamate levels. Crucially, this process requires jasmonate (JA) signaling, as demonstrated by JA-deficient mutants and exogenous methyl jasmonate application. CONCLUSION Our findings reveal that WBPH-GF overcomes 4-FPA-induced resistance by hijacking the host JA pathway to amplify a latent metabolic shunt that diverts the elicitor into inert amino acid conjugates, thereby depleting the substrate for defensive polymer formation. This work uncovers a previously uncharacterized counter-defense strategy wherein a herbivore co-opts plant hormone signaling to metabolically disarm an exogenous elicitor, providing important insights for designing next-generation plant chemical elicitors with metabolic stability. © 2026 Society of Chemical Industry.
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Journal of Water Process Engineering
·
2026
·
IF 6.6
Han Qu,Guofei Li,Zhiwen Cheng,Wanji Zhou,Chao Zhang
Six new phenylazophenol derivatives with tunable substituents were designed to address highly selective Li + /Na + separation. • Structure-performance analysis identifies typical phenol HS-5 as optimal extractants and establishes clear design rules. • The new HS-5/TOPO synergistic system achieves 95.3% single-stage extraction and 99.6% Li + recovery in two stages. • The mechanism underlying the high Li + /Na + selectivity and stability was elucidated by combined DFT and experimental analyses. As brines creasingly constitute source of lithium, the selective extraction of Li + from Na + -rich, high-salinity matrices has become a critical challenge in materials design. In this study, six phenylazophenol derivatives with systematically tunable were designed and synthesized to explore Li + /Na + separation from lithium-containing mother liquor, with structures by 1 H NMR and mass spectrometry. Systematic evaluation of electronic and steric substituent effects established clear structure–performance relationships, identifying 2-phenylazo- 4-trifluoromethylphenol (HS-4) and 4-methanesulfonyl-2-phenylazophenol (HS-5) as the most efficient extractants. A hetero-coordination synergistic extraction system based on HS-5 and trioctylphosphine oxide (TOPO) was further developed and optimized. The optimized system achieved a single-stage Li + extraction efficiency of 95.3%, a Li + /Na + separation factor of 293, and a stripping efficiency of 95.4%. Two-stage cross-flow extraction enabled 99.6% Li + recovery with only 9.3% Na + co-extraction, demonstrating that near-complete lithium removal can be realized with minimal stages. The HS-5/TOPO system retained 79.9% extraction efficiency over ten extraction-stripping cycles without significant degradation. Mechanistic investigations revealed a 1:2 Li + –ligand stoichiometry by Job's method, while DFT calculations showed that HS-5 coordinates to Li + in a bidentate manner through phenolate-O and azo-N, with two P O donors from TOPO completing the distorted tetrahedral coordination environment. These findings underscore the considerable potential of phenylazophenol-based systems for efficient lithium recovery from brines. Download: Download high-res image (209KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2023
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IF 15.1
Ming Chen,Linyang Li,Lanlan Zhong,Chuanbao Xiao,Nianbing Zhong,Quanhua Xie,Dengjie Zhong,Yunlan Xu,Haixing Chang
To effectively remove 4-fluorophenol from water, a novel optical fiber photocatalysis–biodegradation–ion-adsorption reactor, which is composed of photocatalytic optical fibers, algal–bacterial biofilm, and ion-adsorption functionalized glass fiber cloth, was developed. The photocatalytic optical fibers, i.e., polymeric carbon nitride and lanthanum-doped TiO 2 coated photocatalytic optical hollow fibers (POHFs), were located in the middle-layer of the reactor. POHFs have good ultraviolet–visible–near-infrared light absorption and photocurrent conversion capability and can rapidly oxidize 4-fluorophenol into biodegradable products. The S. obliquus biofilm was located on the top layer of the reactor and enriched by phototrophs ( Limnothrix and Gemmatimonas ) and heterotrophs ( Blastomonas and Roseococcus ), which continuously consume the photocatalytic products to accumulate biomass and provide dissolved oxygen through photosynthesis to generate advanced oxidation groups. The fluoride ion (F – ) absorption material, which is composed of amyloid fibril/ZrO 2 /activated carbon nanoparticles, was coated on the glass fiber cloth. The prepared fiber cloth was located on the bottom layer of the reactor and has good F adsorption (the adsorption rate approaches 27.8 μM/L), which enables it to effectively remove the F − in water to avoid F − poisoning of the biofilm. The results showed that the developed fiber reactor can perform complete and rapid removal of 4-fluorophenol (for 160 mL, 0.44 mM 4-FP, totally removed in 20 h) and increase biomass production (increase up to 18.0 mg/day). Hence, it provides a smart method for the effective removal and conversion of 4-fluorophenol in water.
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JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
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2023
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IF 3.4
Qian Chen,Zhao Wang,Huaixia Chen
Aromatase inhibitors (AIs) can indirectly cause increased testosterone in animals, which leads to the improvement of the athletic ability of horses. For the protection of horses and the consideration of fair competition, AIs were listed as prohibited drugs by the Federation Equestre Internationale (FEI). There were several disadvantages using traditional pretreatment methods before analyzing these drugs from biological samples. A rapid and green pretreatment method has been developed by utilizing the hydrophobic deep eutectic solvent (DES)-based vortex-assisted liquid-liquid microextraction (DES-VALLME) followed by ultra-high performance liquid chromatography tandem triple-quadrupole mass spectrometry (UHPLC-MS/MS) technique for the efficient extraction and sensitive detection of AIs in equine urine samples. The combination of menthol and 4-fluorophenol in a molar ratio 1:4 was chosen as the optimum composition of DES for extracting AIs. Under the optimum conditions, only 80 μL of DES, 1 mL equine urine and 2 min were expended. An external standard calibration method was utilized for determination, and a linear relationship was achieved with a concentration range of 0.02–4000 ng mL −1 (r 2 ≥ 0.9983). The limits of detection of the method based on a signal-to-noise ratio of 3 were 0.01–4 ng mL −1 . The accuracy recoveries ranged from 94.9% to 113.4% within the intra-day and inter-day relative standard deviations of less than 9.1%. Compared with traditional extraction methods, the DES-VALLME method had the advantages of rapidity, simplicity, efficiency, low toxicity, and low cost. This method has potential and possessed brilliant prospects for doping control.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jiaxin Zhu,Zekun Liu,Yihua Chen,Zhiqiang Chen,Hang Ma,Jian Sun,Liao Meng,Tongzhou Liu
The discharge of widely used fluorinated aromatics (FAs) leads to their notoriously high persistence and toxicity in natural environments. Defluorination is the key step for FAs pollutants detoxification. Due to its easy operation and mild reaction conditions, hydrodefluorination (HDF), especially electrochemical HDF, is a promising approach for FAs detoxification. A comprehensive and detailed investigation of the effective cathode and mechanism insights are contributable for the development of effective FAs defluorination techniques. In this study, 4-fluorophenol (4-FP) was selected as a model compound to optimize the electrochemical HDF process and understand the reaction mechanism. Cathode coating material investigation revealed that Rh outperformed Pd due to its higher reactivity towards C F bond cleavage. The Rh coating was primarily elemental and in Rh(1 1 1) crystalline form which helped store the generated atomic hydrogen (H*). Reaction conditions optimizations showed 4-FP degradation favored acidic > alkaline > neutral environment and a cell potential higher than −3 V was required for efficient 4-FP degradation. Dissolved oxygen (DO) negatively affected 4-FP degradation and the rapid 4-FP decay only occurred after DO depleted in the solution. Based on quenching experiments and ESR analysis, H* was determined as the main reactive species. In situ Raman characterization suggested that electrochemical 4-FP degradation was initiated by 4-FP adsorption through R···F···Rh bridging and H* generation/adsorption on Rh coated cathode, resulting in phenol generation. The generated phenol further experienced hydrogenation to yield cyclohexanone and cyclohexanol with lower toxicity and better biodegradation potential, demonstrating that electrochemical treatment of 4-FP simultaneously achieved defluorination along with detoxification. The outcomes of this work provide support for electrocatalyst technology development towards efficient FAs treatment while providing in-depth observation of the electrochemical HDF process.
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Electrocatalysis
·
2021
·Vol. 13
·期 1
·81-90
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IF 2.713
Yang Yadan,Wei Xuefeng,Miao Juan,Zhang Ruichang,Xu Hang,Liu Junhui,Zhu Shufa
Electrochemical redox is an effective method to degrade halogenated organic pollutants (HOPs). Herein, highly dispersed Pd-polypyrrole (Pd-PPy) catalysts were synthesized by a facile one-step polymerization method. The morphology and phase structure of the catalysts were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The electrochemical redox of 4-fluorophenol (4-FP) was conducted in a single-chamber reactor with Pd-PPy as a moveable catalyst. The effects of the initial solution pH, constant current, and supporting electrolyte on the degradation of 4-FP were investigated. The removal efficiency of 4-FP was 84.6% after 2 h under an initial solution pH of 2.5 and an applied current density of 2.0 mA/cm 2 . The mechanism of 4-FP degradation was inferred, including the defluorination of 4-FP on the cathode and oxidation of 4-FP and phenol on the anode. The degradation of 4-FP in the Pd-PPy-mediated reactor showed lower energy consumption and higher removal efficiency. The degradation efficiency of 4-FP had almost no change after 20 cycles of experiments, which indicates the good durability of the prepared Pd-PPy catalysts. Graphical abstract
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Journal of Cleaner Production
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2023
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IF 11.1
Min Zhao,Ting Li,Yizhan Zhang,Jiaming Gan,Yiting Zhao,Xin Yu,Lei Wang
Advanced oxidation technology of KrCl excimer lamp activated H 2 O 2 (UV 222 /H 2 O 2 ) have been received widespread attention in the field of water treatment recently, due to the higher radical yield and environmentally friendly nature compared to UV 254 /H 2 O 2 . In this investigation, four representative parahalogenated phenols (HPs) degradation kinetic and mechanisms by UV 222 alone and UV 222 /H 2 O 2 were studied, respectively. The results showed that the photolysis rate constants ( k obs ) under UV 222 followed the order of p -Chlorophenol ( p -CP) > p -Fluorophenol ( p -FP) > p -Bromophenol ( p -BP) > p -Iodophenol ( p -IP), and the degradation rate constants ( k obs ) by UV 222 /H 2 O 2 followed the order of p -FP > p -CP > p -BP > p -IP. The molar absorption coefficient ( ε 2 22nm ) and quantum yield ( Φ 222nm ) of HPs photolysis were measured. Kinetic model simulating results are in fair agreement with the experimental results. Through HPLC-MS analysis and DFT calculation, the impact of halogen ions on the degradation kinetics of HPS by UV 222 and UV 222 /H 2 O 2 was found, the possible reaction pathways and mechanisms were proposed. Compared with UV 254 /H 2 O 2 for removing p -CP, UV 222 /H 2 O 2 was much more energy efficient.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
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IF 11.698
Kexin Li,Ziai Huang,Suiyi Zhu,Shenglian Luo,Liushui Yan,Yuhua Dai,Yihang Guo,Yuxin Yang
A series of biochar-coupled graphitic carbon nitride nanosheets (BPCMSs/g-C 3 N 4 NSs) composites was successfully fabricated through a simple two-step calcination strategy by using waste Camellia oleifera shells (WCOSs) and melamine as raw materials. Hexavalent chromium [Cr(VI)] or total chromium (T-Cr) in water could be completely removed or mostly recovered through adsorption combined with photocatalytic reduction by using the as-prepared BPCMSs/g-C 3 N 4 NSs. The adsorbed Cr(VI) on BPCMSs/g-C 3 N 4 NSs could be reduced by photogenerated electrons into trivalent chromium ions (Cr 3+ ) and stably fixed on BPCMSs/g-C 3 N 4 NSs after strengthening. Interestingly, we found that the photocatalytic activity of the recycled Cr 3+ /BPCMSs/g-C 3 N 4 NSs was remarkably improved compared with that of the fresh BPCMSs/g-C 3 N 4 NSs for the degradation of aqueous organic pollutants . We tested the photocatalytic performance of the recycled Cr 3+ /BPCMSs/g-C 3 N 4 NSs in the combined pollution system containing Cr(VI) and 4-fluorophenol (4-FP) and observed that a synergistic photocatalytic effect occurred in the Cr(VI)/4-FP combined pollution system under acidic and neutral conditions.
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Nature Communications
·
2023
·Vol. 14
·期 1
·1-15
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IF 16.6
Wei Shengjie,Sun Yibing,Qiu Yun-Ze,Li Ang,Chiang Ching-Yu,Xiao Hai,Qian Jieshu,Li Yadong
Carbon-defect engineering in metal single-atom catalysts by simple and robust strategy, boosting their catalytic activity, and revealing the carbon defect-catalytic activity relationship are meaningful but challenging. Herein, we report a facile self-carbon-thermal-reduction strategy for carbon-defect engineering of single Fe-N 4 sites in ZnO-Carbon nano-reactor, as efficient catalyst in Fenton-like reaction for degradation of phenol. The carbon vacancies are easily constructed adjacent to single Fe-N 4 sites during synthesis, facilitating the formation of C-O bonding and lowering the energy barrier of rate-determining-step during degradation of phenol. Consequently, the catalyst Fe-NCv-900 with carbon vacancies exhibits a much improved activity than the Fe-NC-900 without abundant carbon vacancies, with 13.5 times improvement in the first-order rate constant of phenol degradation. The Fe-NCv-900 shows high activity (97% removal ratio of phenol in only 5 min), good recyclability and the wide-ranging pH universality (pH range 3-9). This work not only provides a rational strategy for improving the Fenton-like activity of metal single-atom catalysts, but also deepens the fundamental understanding on how periphery carbon environment affects the property and performance of metal-N 4 sites.
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Environmental Science-Nano
·
2020
·Vol. 8
·期 1
·217-232
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IF 7.683
Kexin Li,Dongxiao Zhao,Yawen Li,Shenglian Luo,Zhentao Zhou
In this article, three types of surface-modified g-C3N4 (H+/g-C3N4, BCQDs/g-C3N4, and H+/BCQDs/g-C3N4) with unique photocatalytic properties have been successfully fabricated by simple and low-cost strategies. The morphology, elemental composition, textural properties, structural information, and photoelectric properties of the as-prepared materials are systematically characterized. Subsequently, the as-prepared materials are applied to Cr(VI) reduction, 4-FP degradation, and simultaneous Cr(VI) reduction with 4-FP degradation photocatalytic systems under normal and anoxic conditions. Based on the photocatalytic test results, we successfully constructed a macro-thermodynamic model to reveal the essential laws of synergistic photocatalytic effects. The constructed macro-thermodynamic model is suitable for complex photocatalytic systems and is of great significance for the application of photocatalytic technology in real wastewater treatment with multiple pollutants.
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Nano Research
·
2021
·Vol. 15
·期 2
·1338-1346
·
IF 8.897
Li Zhijun,Zhang Mingyang,Zhang Lili,Dong Xiuli,Leng Leipeng,Horton J. Hugh,Wang Jun
Tuning the electronic properties of single atom catalysts (SACs) between the central metal and the neighboring surface atoms has emerged as an efficient strategy to boost catalytic efficiency and metal utilization. Here we describe a simple and efficient approach to create atomically dispersed palladium atoms supported over defect-containing porous ceria nanorod containing palladium up to 0.26 wt.%. The existence of singly dispersed palladium atoms is confirmed by spherical aberration correction electron microscopy and extended X-ray absorption fine structure measurements. This catalyst shows excellent efficiency in hydrodehalogenation reactions at low H 2 pressure under mild conditions, along with satisfactory recyclability and scalability. Density functional theory (DFT) calculations reveal that the high activity stems from the spatial isolation of palladium atoms and the modified electronic structure of palladium confined in defect-containing ceria nanorod. This work may lay the foundation for the facile creation of single atom catalysts within the synthetic community and shed light on the possibility for scale-up production.
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