Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Junyong He,Ya Yang,Peidong Hong,Yulian Li,Chao Xie,Zijian Wu,Minqiang Li,Lingtao Kong
The use of peroxymonosulfate (PMS) activation to eliminate organic contaminants is a promising technology to purify water owing to its strong reactivity. However, because of the existed rate limiting step, the performance of PMS activation was restrained and required external energy consumption. Therefore, a new strategy was proposed to solve this problem by preparing catalysts with abundant electron-rich sites and electron traps to accelerate PMS activation. In this research, a novel MnCeO x -H catalyst with rich surface oxygen vacancies was firstly synthesized to accelerate the transfer of electrons among the catalysts, oxidant and pollutants. The contaminants were rapidly eliminated in the MnCeO x -H/PMS system, while the reaction rate constant of MnCeO x -H/PMS system was 30 times higher than that of CeO 2 /PMS system. The surface oxygen vacancies were able to adsorb and trap PMS, then the free electrons of oxygen vacancies would reduce PMS and produced HO•, 1 O 2 and SO 4 •- , while 1 O 2 played a major role. The contaminants which acted as electron-donors in this system were adsorbed at Mn, Ce sites, achieving effective conversion recycling of Ce(IV)/Ce(III), Mn(III)/Mn(II) and Mn(IV)/Mn(III). This discovery is believed to inaugurate a novel way for designing powerful electron-rich sites and electron traps to accelerate PMS activation for contaminants degradation.
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CHEMOSPHERE
·
2023
·
IF 8.8
Huiwang Dai,Jingyi Zhu,Fanxu Meng,Daohui Lin,Wenjun Zhou,Dingjiang Chen,Ming Zhang,Qingqing Wang
In this study, Cu hybridization coupling oxygen defect engineering was adopted to synthesis of CuNiFe layered double oxides (CuNiFe-LDOs) in peroxymonosulfate (PMS) activation for degradation of methyl 4-hydroxybenzoate. The morphology and crystal structure of CuNiFe-LDOs was characterized in detail, which exhibited regular layered-structure at a Cu:Ni doping ratio of 1:1 and annealing temperature of 400 °C, and presented the crystal of Cu x O@Fe 3 O 4 –NiO. Besides, the X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) results demonstrated that abundant oxygen vacancies (OVs) and low oxidation state Cu species were composed in CuNiFe-LDOs400. The Cu 1·5 Ni 1·5 Fe 1 -LDOs400/PMS system showed excellent catalytic performance toward the degradation of butyl 4-hydroxybenzoate (BuP), and resistant to the effect of pH value and background inorganic anions. Based on quenching experiments and EPR measurements, singlet oxygen ( 1 O 2 ) was identified as the dominant active species during the heterogeneous catalytic process, which was generated by the synergistic interaction between OVs-Cu(I) site and PMS . In this process, the electron-drawing property of OVs promoted the adsorption of PMS molecule on Cu(I) site, followed by the accumulation of electron and cleavage of O–O bond to generate intermediate oxygen radical species, which donated one electron to eventually generate singlet oxygen.
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MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Wei Zhang,Liling Zhang,Shengmiao Sun,Bixuan Wang,Ling Jiang,Liying Zhu
Dopamine (DA) dysfunction is known to cause neurological and physiological disorders, such as schizophrenia, Parkinson's disease, and addictive behavior. Therefore, dopamine detection is essential for both diagnosis and disease prevention. In this study, a novel and effective electrochemical sensor was fabricated based on a carbon quantum dots (CQDs)@molecularly imprinted polymers (MIPs) modified electrode for dopamine detection. The CQDs were obtained by an eco-friendly hydrothermal carbonization method, using sycamore leaves as a natural carbon source. The structure of the prepared CQDs@MIPs composite was confirmed through techniques including Ultraviolet–visible absorption spectroscopy, dynamic light scattering technique, scanning electron microscopy, and transmission electron microscopy. By combining the rapid electron transfer rate of the CQDs with the selective activity of the MIPs , the prepared CQDs@MIPs composite-modified electrode demonstrated greatly enhanced electrochemical performance. The developed sensor exhibited a good response towards dopamine detection, with a considerably lower detection limit (5 × 10 −9 M ) and a wider linear range (5 × 10 −9 –5 × 10 −4 M ) compared to current publications. In addition to the outstanding reproducibility and anti-interference ability, this ‘green sourced’ sensor showed great potential for practical applications, as validated by the satisfactory recovery analysis of dopamine from goat blood serum.
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ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Penghu Duan,Dongpeng Mao,Dayi Zhang,Xinyao Wang,Xiyao Kong,Yunxian Piao
A label and reagent free and cost effective immunosensing system was newly developed for detection of trace leveled atrazine in water. This was constructed by synthesis of polyaniline (PA) and polystyrene sulfonic acid (PSS) modified biochar (BC) nanoparticle composite (PA-PSS-BC) and coating them on screen printed electrode as conductive and electrochemically active layer, and covalently immobilizing anti-atrazine antibody on electrode for specific target binding. The low cost biochar from sugarcane was highly conductive and favorable for attaching PA and PSS due to large surface area and sp 2 carbon structure. Crediting to dopant PSS, PA-PSS-BC achieved significant enhancement of redox current signal even in phosphate buffered saline of neutral pH compared to that of without PSS. And redox current of PA was extremely stable with negligible signal change even after twenty cycles repeated reactions owning to protection by BC. These essentially ensured sensing platform being sensitively performed in neutral solution with exemption of adding external redox reagent. As a result, fairly low concentrations of atrazine could be detected within 5 min, with limit of detection being 0.407 ng/L in a dynamic detection range varying from 1 to 100 ng/L. Moreover, the immunosensor exhibited reasonable signal recoveries for detecting trace leveled atrazine in real water samples, high selectivity, and good stability with dry and cold storage.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Guojuan Qu,Peng Jia,Tao Zhang,Shuai Tang,Md. Nahid Pervez,Yixiong Pang,Bin Li,Chengjin Cao,Yaping Zhao
Doping nonmetallic heteroatoms into carbonaceous materials is a proven strategy for enhancing peroxymonosulfate (PMS) activation in the degradation of endocrine-disrupting compounds (EDCs). Understanding the role of heteroatom doping defects and intrinsic defects (topological, vacancies, or edge defects) on PMS activation is crucial for designing more efficient carbon catalysts. Herein, we synthesized nitrogen (N) and phosphorus (P) co-doped carbon microspheres (NPCs) through the pyrolysis of aminophosphonic acid resin (D418) precursors and utilized them to activate PMS for bisphenol A (BPA) degradation. The pyrolysis temperature was found to regulate the type and degree of defects, as well as the configuration of N and P. NPC-1000 (pyrolysis temperature at 1000 °C) exhibited the highest reaction rate constant ( k ) (1.20 × 10 −1 min −1 ) with the lowest N and P doping defects and the highest intrinsic defect intensity resulting from the removal of N and P during pyrolysis. Density functional theory (DFT) calculations and correlation analysis between defect sites and k suggest that the adsorption of PMS was facilitated by graphitic N-coordinated C and intrinsic defect sites rather than P doping defect sites, resulting in the degradation of BPA through electron transfer and radical mechanisms, specifically superoxide radicals (O•–2). Excess halide anions led a significant increase of k with only a limited formation of trichloromethane (TCM) (disinfection byproducts) in presence of 100 mM Cl − . This research offers fundamental insights into constructing intrinsic defects through regulating heteroatom configuration, intending to enhance the catalytic activity of metal-free materials.
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JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Siqi Wu,Siyao Liu,Zhiming Wang,Yinguang Chen,Guohua Zhao
Bisphenol analogues (BPs) are typical environmental hormones with endocrine-disrupting effects and reproductive toxicity requiring analysis and monitoring in complex aquatic environments. However, the presence of various co-existing contaminants makes the accurate determination of total BPs difficult. To address this challenge, there is a strong need to obtain a group-targeting binder to specifically detect a class of BPs. In this work, for the first time we have identified the group-targeting BPs-aptamer with similar affinities for multiple structurally and qualitatively similar BPs. Base mutations were introduced into an aptamer specific to bisphenol A (BPA) and utilized molecular docking calculations to identify a group-targeting aptamer capable of binding BPs, including BPA, bisphenol B (BPB), bisphenol E (BPE) and bisphenol F (BPF) with binding constants in the range of 2.0 × 10 6 ∼ 2.7 × 10 6 / M. In addition, an electrochemical aptamer-based sensor (aptasensor) was constructed for highly sensitive and comprehensive analysis of a class of BPs. This aptasensor demonstrated remarkable anti-interference performance against co-existing contaminants at concentrations up to 100-fold and achieved an impressive detection limit of 6.7 pM. This innovative approach of engineering a group-targeting BPs-aptamer is important for the comprehensive analysis of BPs, providing insights into identification and monitoring a class of pollutants.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Ruiqian Tao,Nianrong Feng,Jiahua Li,Bochen Li,Yugui Lv,Kenan Li,Dongying Hu
The development of flexible self-luminous reversible thermochromic passive energy-saving composites (TPCMs) is self-challenge due to the defects of easy leakage, non-visibility, solid phase rigidity, and weak light absorption . So, the emerging TPCMs were cleverly constructed using wood aerogel as support skeleton and different mass ratios of natural latex/long afterglow components as flexible and self-luminescent matrix based on optimal binary fatty alcohol eutectic (C 14 C 20 ). Among them, C 14 C 20 R-TEW-1R and C 14 C 20 G-TEW-0.35 P stand out with suitable phase transition temperatures (28.8 °C and 29.7 °C), high latent heat values (100.5 J g −1 and 119.4 J g −1 ), and low supercooling (0.7 °C and 0 °C). Induced by phase change, they change from rigid to flexible, from red/green to milky white, and can absorb light to achieve self-luminescence in the dark (orange red and blue-green) and enhanced photothermal efficiency. Beyond the traditional thermal/light stability and excellent anti-leakage performance, TPCMs realizes the combination of temperature sensitivity/control and self-luminous, providing broad application prospects in home automation, passive energy-saving in buildings, luminescent response switches, and other fields.
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FOOD AND CHEMICAL TOXICOLOGY
·
2023
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IF 4.3
Qiuyan Pu,Fei Yang,Rui Zhao,Su Jiang,Yunping Tang,Tao Han
In order to investigate the amelioration of docosahexaenoic acid-enriched phosphatidylserine (DHA-PS) on bisphenol A (BPA)-induced nephrotoxicity , the murine nephrotoxicity model was established by intragastric administration of BPA (5 mg/kg/B.W.) for 6 weeks. The biochemical indices, hematoxylin-eosin (H&E) staining, kidney metabolomics, and related protein expression levels of SIRT1-AMPK pathway were then determined. Our results indicated that DHA-PS (100 mg/kg/B.W.) ameliorated the BPA-induced nephrotoxicity after 6 weeks of intragastric administration, primarily by decreasing the serum creatinine (CRE) and blood urea nitrogen (BUN), renal inflammatory cytokines and lipid levels, and increasing the antioxidant enzyme activities . In addition, the untargeted metabolomics of the kidney indicated that BPA perturbed the tryptophan metabolism, pyridine metabolism, and valine , leucine , and isoleucine biosynthesis, while DHA-PS administration significantly affected the glycerophospholipid metabolism, valine, leucine, and isoleucine biosynthesis to ameliorate the BPA-induced metabolic disorder . Moreover, DHA-PS administration could ameliorate the BPA-induced lipid disturbance by upregulating the expressions of AMPKα1, SIRT1, and PPARα while downregulating the expression of SREBP-1c through the SIRT1-AMPK pathway. This is the first time that the amelioration effects of DHA-PS on BPA-induced nephrotoxicity have been investigated from multiple perspectives, suggesting that DHA-PS might be a potential dietary supplement for reducing BPA-induced nephrotoxicity.
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MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Xiaomei Chen,Liulin Wei,Qian Liu,Xueyun Gao,Jingchan Zhao
In the present study, a novel temperature-sensitive hyperbranched polysiloxane dispersive liquid–liquid microextraction combined with high-performance liquid chromatography method (TS-HBPSi-DLLME-HPLC-UV) has been developed for the determination of five polycyclic aromatic hydrocarbons (PAHs) in instant noodles, in which temperature-sensitive hyperbranched polysiloxane (p(Ph-HBPSi-co-NIPAM)) was used as the extraction solvent. The method adsorbs the target analytes based on π-π and hydrophobic interaction between p(Ph-HBPSi-co-NIPAM) and PAHs, and then separates the polymer with the adsorbed target analytes from the solution by a phase transition. Microextraction parameters of the method including polymer ratio, type and concentration of salt, pH, extraction time and volume of acetonitrile were examined in detail and optimized. At the optimum conditions, the established method showed good linearity (R 2 ≥ 0.9971) with satisfactory limits of detection (0.089–0.16 ng mL −1 ) and limits of quantitation (0.27–0.48 ng mL −1 ). The values for intra-day and inter-day precisions were lower than 3.2% and 4.4%, respectively. Enrichment factors (EFs) and extraction recoveries (ERs) ranged from 62 to 70 and 75 to 85%, respectively. Finally, the proposed microextraction technique was validated by analyte addition and recovery studies, and applied to the determination of five PAHs in instant noodles, demonstrating that temperature-sensitive hyperbranched polymers have great potential for application in sample pretreatment techniques.
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Water
·
2023
·Vol. 16
·期 1
·121
·
IF 3.4
Xiaoze Yin,Huaqin Yin,Renjie Wang,Jinnan Wang,Aimin Li
Novel Fenton-like catalyst HKUST-1(Cu)/MoS2-3-C with a non-equilibrium-state surface was constructed for selective degradation of phenolic contaminants. Electron-polarized distribution facilitated the formation of σ-Cu-ligand between electron-poor Cu centre and phenolic compounds, which not only enhanced radicals generation but also accelerated the Cu(I)/Cu(II) redox. Meanwhile, ≡Mo–OOSO3−complexes formed by the electron-rich Mo centre and peroxymonosulfate (PMS), could directly oxidize phenolic contaminants with the generation of SO4•−. The radical quenching experiments and EPR tests indicated that both SO4•−and•OH played a dominant role in the reaction. Additionally, O2could be reduced to O2•−by OVs and subsequently converted into1O2over the Mo centre. DFT calculation, FT-IR, and in situ Raman spectra analysis results demonstrated that phenolic compounds and PMS were respectively adsorbed by electron-poor Cu centre and electron-rich Mo centre, favouring the electrons transfer from phenolic contaminants to Mo centre for PMS activation. With synergistic effects of σ-Cu-ligand and ≡Mo–OOSO3−complexes, HKUST-1(Cu)/MoS2-3-C achieved a high degradation rate of phenolic contaminants and utilization efficiency of PMS.Keywords:fenton-like catalyst;non-equilibrium-state surface;σ-Cu-ligand;≡Mo–OOSO3−complex;phenolic contaminants degradation
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POLYMER BULLETIN
·
2021
·Vol. 79
·期 3
·1615-1626
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IF 2.87
Yang Rui,Hao Boran,Zhang Kan
The cleavage of the oxazine ring of benzoxazine resins generally requires high energy during the ring-opening polymerization, which leads them to be processed at a much higher temperature than the traditional thermoplastics. In this paper, a bio-based substance, L-histidine, has been used as the catalyst to lower the ring-opening polymerization of the well-commercialized benzoxazine resin (BA-a) based on aniline and bisphenol-A. The catalytic effect of L-histidine on the polymerization behaviors of benzoxazine resin (BA-a) has been monitored by differential scanning calorimetry and in situ Fourier transform infrared spectroscopy. In addition, L-histidine has also been found to be a good property modifier for BA-a-derived thermosets. The thermal properties of resulting polybenzoxazines have been investigated by thermogravimetric analysis and dynamic thermomechanical analysis. Notably, the thermoset derived from BA-a with adding only 5 mol% L-histidine exhibits excellent thermal stability in consideration of high T g (206 °C), high T d10 temperature (319 °C) and high chair yield value (40%), making this thermosetting resin a promising material for high-performance applications.
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Nano Research
·
2021
·Vol. 14
·期 7
·2363-2371
·
IF 8.897
Lv Yan,Yue Lin,Khan Imran Mahmood,Zhou You,Cao Wenbo,Niazi Sobia,Wang Zhouping
Herein, we report the fabrication of Fe 3 O 4 @TiO 2 nanosheet/Ag/g-C 3 N 4 (Fe 3 O 4 @ns-TiO 2 /Ag/g-C 3 N 4 ) composite photocatalysts with well-designed hierarchical yolk-shell structure. To endow the composites with fascinating features, multiple functional components are perfectly integrated into the definite structure. The photodegradation experiments of organic pollutants revealed a significant enhancement in photocatalytic activity of developed composites as compared to P25, which is mainly due to the synergetic interaction of the tailored three-dimensional (3D) yolk-shell porous nanostructure, extended sunlight response range, and retarded the recombination probability of photogenerated electrons-holes. More importantly, the hybrid samples exhibited superior magnetic properties due to the magnetic component. The excellent magnetic recyclability and reusability of the photocatalysts are verified by the magnetic hysteresis loop and cyclic photocatalytic degradation experiments, which is significant for the green and sustainable applications of photocatalysts. Considering its remarkable photocatalytic performance and expectant magnetic recyclability, the composite photocatalysts are expected to be a promising candidate to dispose of future environmental issues.
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