JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Jing Chen,Qifang Ren,Chunshan Xu,Bin Chen,Shaohua Chen,Yi Ding,Zhen Jin,Wanmi Guo,Xinyu Jia
In this study, Ag 2 O/BiVO 4 /diatomite composite with p-n heterojunction structure was synthesized by simple hydrothermal method with diatomite as carrier. It was found that under the action of hydrogen peroxide (H 2 O 2 ), the imidacloprid (IMD) could be effectively degraded by the composite. Systemic evaluations was conducted on effects of pH value, catalyst dosage, H 2 O 2 concentration, initial IMD concentration, and anion on how effeciently this new photocatalytic composite can degrade IMD. The results show that the p-n heterojunction formed between the two contact surfaces of Ag 2 O nanoparticle and BiVO 4 promotes the charge transfer between the interfaces, inhibits recombination of electrons and holes, and thus significantly improves the catalytic performance. The stability and reusability of Ag 2 O/BiVO 4 /diatomite composites were tested with ICP experiment and cyclic experiment. Active substance capture experiment and ESR reveal the photocatalytic reaction mechanism and confirm that superoxide radical ( O 2 − ), hydroxyl radical ( OH), and h + can promote the degradation of IMD. The degradation products and the intermediates of IMD were identified through LC-MS, on a basis of which the possible transformation pathway was proposed. In situ synthesis of p-type Ag 2 O and n-type BiVO 4 heterojunction composites has opened a new direction for photocatalytic degradation of organic pollutants.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jiawei Liu,Liqiao Zhong,Hao Zeng,Wenbo Li,Yuelin Huang,Hao Wu,Zhanpeng Zhou,Ling Li,Ying Huang,Yaocheng Deng
Exciton utilization offers a non-radical pathway for pollutant removal, yet efficient triplet-state population and oxygen activation remain challenging. Here, a semi-crystalline melon carbon nitride (Mel-Salt-Th100, 100 mg thiourea) is fabricated via a one-step molten-salt route. Under visible-light irradiation (300 W Xe, λ > 420 nm), the material eliminates 80% of imidacloprid within 60 min, with a rate constant 17.3 and 8.1 times those of Mel-Th and Mel-Salt, respectively. Cyano/sulfur doping and K + intercalation introduce exciton trap levels and optimize intersystem crossing, facilitating rapid triplet-state population and energy transfer to adsorbed O 2 for selective 1 O 2 generation. HPLC-MS/MS (high-performance liquid chromatography-tandem mass spectrometry) and toxicological tests further confirm efficient imidacloprid degradation and detoxification. This exciton-engineering strategy is readily extendable to other refractory organics and to triplet-sensitized energy-conversion reactions, providing a general blueprint for designing high-performance polymer photocatalysts.
研究领域:
光催化
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环境化学
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材料科学
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能量转换
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有机污染物降解
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DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2025
·
IF 6.2
Qi Zhang,Shuangshuang Bai,Mingwan Liu,Zhuhua Gong,Yun Ren,Wenlin Zhang,Qiang Li,Qinhong Liao,Zexiong Chen,Jianmin Tang
Biomass-derived magnetic biochar is a promising imidacloprid adsorbent because of its low cost, easy separation, and eco-friendly features. This study prepared a novel magnetic Fe 3 C@Fe 3 O 4 core–shell biochar nanocomposite (Fe 3 C@Fe 3 O 4 /BC) using a facile one-step method with Zanthoxylum bungeanum pruning branches as raw materials and K 3 [Fe(C 2 O 4 ) 3 ]•3 H 2 O as the pore-forming agent and Fe source. The prepared Fe 3 C@Fe 3 O 4 /BC had a well-developed porous structure, a considerable specific surface area of 1471.3 m 2 g −1 , good magnetic separation performance, and excellent adsorption performance of imidacloprid. The adsorption capacity of Fe 3 C@Fe 3 O 4 /BC toward imidacloprid reached 288.9 mg g −1 within 1 min, and its maximum adsorption capacity was 557.1 mg g −1 . The adsorption performance of Fe 3 C@Fe 3 O 4 /BC was was stable under extreme environmental conditions, and its regeneration was excellent, which was superior to typical commercial adsorbents. The adsorption mechanism of imidacloprid by Fe 3 C@Fe 3 O 4 /BC involved the comprehensive effects of pore capture, van der Waals forces, hydrogen bonding, electrostatic attraction, and complexation of oxygen-containing functional groups. This work can provide an advanced strategy for the fabrication of high-performance adsorbents from biomass resources for the effective treatment of imidacloprid wastewater.
研究领域:
环境科学
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材料科学
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吸附技术
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纳米复合材料
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污染物去除
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DOI
高影响因子
TALANTA
·
2013
·
IF 3.498
Qamar Subhani,Zhongping Huang,Zuoyi Zhu,Yan Zhu
A new analytical method has been developed and validated for the simultaneous determination of pesticides from different classes using ion chromatography-online photochemical derivatisation-fluorescence detector (IC- hv -FD). Fluorimetric detection was performed at λ ex / λ em =332 nm/367 nm for imidacloprid and then detector was set at λ ex / λ em =247 nm/470 nm for carbendazim . The two pesticides imidacloprid and carbendazim were successfully separated isocratically on an IonPac ® AS11 (250 mm×4 mm i.d; 13 µm particle size, Dionex) anion-exchange column using 40 mM KOH with 10% (v/v) acetonitrile and pumped at a flow rate of 1.0 mL min −1 . Under the optimized conditions, the limit of detection (LOD, S/N=3) of imidacloprid and carbendazim were 7.8 µg L −1 and 67 µg L −1 , respectively. The experimental results showed that there was good linearity with a correlation coefficient ( r )≥0.9966 over the range of 0.05–10 mg L −1 for imidacloprid and 0.2–15 mg L −1 for carbendazim. Good reproducibility with a relative standard deviation (RSD, n =7) less than 4.5%. Finally, the proposed method was applied with satisfactory results to the analysis of these pesticides in ground water, lake water and river water without any pre-treatment of samples. The average spiked recoveries were in the range of 90–104%.
研究领域:
分析化学
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环境科学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Xiuqin Chen,Liangmiao Qiu,Qiquan Liu,Yuxian He
Nanopesticides represent cutting-edge technologies and approaches for achieving efficient and sustainable agriculture, offering an effective pathway toward developing environmentally friendly pesticides. To enhance the drug loading capacity (LC) and controlled release efficiency of metal–organic framework (MOF) carriers, this study used the amphiphilic lipid polymer 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[amino(polyethylene glycol)-2000] (ammonium salt) (DSPE-PEG-NH 2 , MW 2000 Da) as a carrier to load imidacloprid (IMI) through a solvent evaporation approach, creating polymer nanoparticles (IMI-DSPE). Subsequently, zinc nitrate hexahydrate was employed as the zinc source to coordinate with amino groups on the polymer nanoparticles, forming IMI@DSPE-Zn 2+ . Using 2-methylimidazole as a ligand, IMI was further loaded onto IMI@DSPE-Zn 2+ through an in-situ growth strategy, yielding polymer–MOF nanoparticles (IMI-DSPE@ZIF-8). IMI-DSPE@ZIF-8 had an average particle size of 272.79 nm and an LC of 72.20%, with significantly improved IMI solubility and thus higher wettability on the surface of faba bean leaves. Compared to IMI-WG, the degradation rate of IMI-DSPE@ZIF-8 is reduced by 56.19%. Furthermore, IMI-DSPE@ZIF-8 exhibited a cumulative release of 84.6% at pH 5.0, which was higher than that under neutral conditions, indicating that its pH-responsive properties will enable it to respond effectively to the acidic microenvironment of aphid intestines. Compared to commercially available water-dispersible IMI granules (IMI-WG), pot experiments demonstrated the superior efficacy of IMI-DSPE@ZIF-8 in controlling M. crassicauda . The excellent insecticidal activity of IMI-DSPE@ZIF-8 against target pests, combined with its superior compatibility with non-target organisms, provide a scientific basis for reducing pesticide usage, enhancing insecticidal efficacy, and promoting green, sustainable pest control in agriculture.
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DOI
高影响因子
ANALYST
·
2022
·Vol. 147
·期 17
·3917-3923
·
IF 5.227
Feiyan Tang,Qing Hua,Xiaobin Wang,Feng Luan,Li Wang,Yanhong Li,Xuming Zhuang,Chunyuan Tian
As an efficient and easily available pesticide, imidacloprid (IM) has been widely used in agriculture to kill pests. However, threats to the ecological environment are becoming increasingly prominent, caused by abuse and pesticide residues. This paper reports a sensitive electrochemiluminescence (ECL) sensor based on upconverting nanoparticle functional zeolite imidazolate framework (UCNPs@ZIF-8) nanocomposites combined with molecularly imprinted polymers (MIPs) to successfully achieve the quantitative detection of IM. The composites exhibited a certain multi-faceted prismatic structure and the effective binding of UCNPs was demonstrated by characterization technology. In addition, a sensor with MIPs/UCNPs@ZIF-8/GCE as the working electrode exhibited outstanding ECL performance, including a strong and stable signal and excellent selectivity under optimal conditions. This sensor showed a good linear response to IM over a wide concentration range (0.1 ng L−1–1 mg L−1), with a limit of detection as low as 0.01 ng L−1. More significantly, it was successfully applied to the determination of IM concentration levels in food, which provides broad application prospects for the construction of pesticide ECL sensors.
研究领域:
分析化学
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环境科学
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材料科学
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食品安全
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DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 8
·4704-4709
·
IF 3.108
Lijuan Zhao,Juan Yang,Huili Ye,Faqiong Zhao,Baizhao Zeng
A hydrophilic ionic liquid monomer (i.e. 1-(α-methyl acrylate)-3-vinylimidazolium bromide) was immobilized on carboxylated multi-walled carbon nanotubes (MWNTs) by ion exchange, then reversible addition–fragmentation chain transfer precipitation polymerization (RAFTPP) was performed in the presence of a template, imidacloprid. The obtained imidacloprid imprinted material showed a netlike structure; it had a large surface and high adsorption capacity, and allowed rapid mass transfer. When it was supported on a 1-(3-aminopropyl)-3-methylimidazolium bromide functionalized-graphene (GR-IL) coated glassy carbon electrode, the resulting sensor presented a good electrochemical response to imidacloprid. After optimizing the preparation and determination conditions, a linear range of 0.2–24 μM with a sensitivity of 0.71 μA μM−1 mm−2 was obtained. The detection limit was 0.08 μM. The sensor also presented good selectivity and reproducibility. It was successfully applied to the determination of imidacloprid in practical samples and the recovery for the standards added was 94–107%.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
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2021
·
IF 7.963
Kanming Wang,Ji Shu,Virender K. Sharma,Cong Liu,Xiping Xu,Nasri Nesnas,Hongyu Wang
Imidacloprid (IMI), an emerging pollutant, has high toxicity to non-target organisms. This paper presents the kinetics of IMI removal by ferrate(VI) at different pH (6.0–9.0), molar ratios ([ferrate(VI)]:[IMI]) and added Fe(III) ions. The apparent second-order rate constant ( k app ) decreased with increase in pH from pH 6.0 to 9.0 (i.e., (1.2 ± 0.1) × 10 2 M −1 s −1 to (8.3 ± 0.3) M −1 s −1 ). The species-specific rate constants were obtained as k (HFeO 4 − ) = 1.3 × 10 2 M −1 s −1 and k (FeO 4 2− ) = 6.9 M −1 s −1 . The decreases in the concentration of HFeO 4 − with increase in pH caused the observed pH dependence in k app . At pH 7.0, the removal of IMI increased with the molar ratio from 1.0 to 10.0 with complete removal at the highest ratio. The variation in pH from 6.0 to 9.0 had no obvious effect on removal of IMI. Experiments indicate that IMI removal is mainly by ferrate(VI) oxidation and to a lesser extent by Fe(III) adsorption. Mineralization of IMI was also observed (20–26%). The addition of Fe(III) ions to ferrate(VI)-IMI at pH 7.0 and 8.0 resulted in enhanced removal of IMI, but the presence of Ca 2+ , SO 4 2− , HCO 3 − , and humic acid (HA) has negative effects. The presence of coexisting substances in river water slightly decreased IMI removal by ferrate(VI) by less than 10%. Identification of products and frontier electron density (FED) calculations demonstrated involvement of opening of the five-membered heterocyclic moiety of IMI by ferrate(VI). Toxicity assessment with NIH 3T3 fibroblasts and ECOSAR analysis indicated lower toxicity of oxidized products than parent IMI.
研究领域:
环境科学
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化学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Jianing Li,Juan Chen,Yanhui Ao,Xin Gao,Huinan Che,Peifang Wang
The construction of dual Z-scheme photocatalysts is an effective way to promote the separation and migration of electrons-holes as well as retain their high redox abilities. Herein, a distinctive dual Z-scheme photocatalyst based on phase junction WO 3 and CdS (CW) was successfully fabricated via hydrothermal method and in-situ precipitation process. The as-prepared materials showed the advantages of both phase junction and dual Z-scheme mechanism (promoted utilization of carriers and improved redox potential). As a result, the k app value of 75CW (0.05237 min −1 ) was 29.8 times that of phase junction WO 3 (0.00176 min −1 ) and 2.9 times that of CdS (0.01799 min −1 ) in terms of imidacloprid (IMD) degradation. Trapping experiment and electron spin resonance (ESR) proved the dual Z-scheme mechanism, the key to significantly improve photocatalytic degradation efficiency of WO 3 /CdS nanocomposites. Combined the analysis of liquid chromatography-mass spectrometry (LC-MS) with density functional theory (DFT) calculation, rational degradation pathways of IMD were put forward in detail. This work is excepted to provide new horizons for the construction of dual Z-scheme system with phase junction and the photodegradation of IMD.
研究领域:
环境科学
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材料科学
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化学
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DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 11
·2570
·
IF 5
Dan Wang,Lin-Huan Du,Long Li,Yu-Meng Wei,Tao Wang,Jun Cheng,Bin Du,Yi Jia,Bao-Yi Yu
Coordination polymers (CPs) are organo-inorganic porous materials consisting of metal ions or clusters and organic linkers. These compounds have attracted attention for use in the fluorescence detection of pollutants. Here, two Zn-based mixed-ligand-bearing CPs, [Zn2(DIN)2(HBTC2−)2] (CP-1) and [Zn(DIN)(HBTC2−)]·ACN·H2O (CP-2) (DIN = 1,4-di(imidazole-1-yl)naphthalene, H3BTC = 1,3,5-benzenetricarboxylic acid, and ACN = acetonitrile), were synthesized under solvothermal conditions. CP-1 and CP-2 were characterized by single-crystal X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, elemental analysis, and powder X-ray diffraction analysis. Solid-state fluorescence analysis revealed an emission peak at 350 nm upon excitation at 225 and 290 nm. Fluorescence sensing tests showed that CP-1 was highly efficient, sensitive, and selective for detecting Cr2O72−at 225 and 290 nm, whereas I−was only detected well at an excitation of 225 nm. CP-1 detected pesticides differently at excitation wavelengths of 225 and 290 nm; the highest quenching rates were for nitenpyram at 225 nm and imidacloprid at 290 nm. The quenching process may occur via the inner filter effect and fluorescence resonance energy transfer.Keywords:coordination polymers;fluorescence sensing;d10metal;CP;sensing ions;sensing pesticides
研究领域:
材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2023
·
IF 6.8
Yue Wang,Guojun Pan,Tingjie Huang,Tao Zhang,Jin Lin,Lubin Song,Guangshuo Zhou,Xiaoping Ma,Yanqing Ge,Yongyu Xu,Chunhao Yuan,Nan Zou
Pesticide stress on plants is receiving increased scrutiny due to its effect on plant secondary metabolism and nutritional quality. Tannic acid (TA) is a natural polyphenolic compound showing excellent antioxidant properties and is involved in alleviating stress. The present study thoroughly investigated the effects and mechanism of exogenous TA on relieving imidacloprid (IMI) stress in tea plants. Our research found that TA(10 mg/L) activated the antioxidant defense system, enhanced the antioxidant ability, reduced the accumulation of ROS and membrane peroxidation, and notably promoted tea plant tolerance to imidacloprid stress. Additionally, TA boosted photosynthetic capacity, strengthened the accumulation of nutrients. regulated detoxification metabolism, and accelerated the digestion and metabolism of imidacloprid in tea plants. Furthermore, TA induced significant changes in 90 important metabolites in tea, targeting 17 metabolic pathways through extensively targeted metabolomics. Specifically, TA activated the flavonoid biosynthetic pathway, resulting in a 1.3- to 3.1-fold increase in the levels of 17 compounds and a 1.5- to 63.8-fold increase in the transcript level of related genes, such as ANR , LAR and CHS in this pathway. As a potential tea health activator, TA alleviates the oxidative damage caused by imidacloprid and improves the yield and quality of tea under pesticide stress.
研究领域:
植物科学
·
农业化学
·
分子生物学
·
药理学
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产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2023
·
IF 8.8
Xiaoyan Tang,Luying Chen,Yang Ding,Huanping Liu,Muzi Li,Yang Yang
Both nanoplastics (NPs) and imidacloprid (IMI) are widely distributed in the environment and have attracted significant attention due to their adverse effects on ecosystems. Constructed wetlands have the potential to remove IMI, but there is still limited understanding of how wetland plants interact with IMI, especially when influenced by different charged NPs. This study assessed their ecotoxicological effects, as well as the fate and transformation of IMI in papyrus ( Cyperus papyrus L.) under the influence of different charged NPs and identified key driving genes in the plant. Results show that simultaneous exposure to positively charged PS-NH 2 and IMI inhibited plant growth. The combined action of NPs and IMI intensified their toxicity, enhancing lipid peroxidation and altering antioxidant enzyme activities . The IMI removal efficiency, which was primarily driven by biodegradation, was 80.61%, 88.91%, and 74.71% in the IMI-alone, co-IMI/PS_COOH, and co-IMI/PS_NH 2 systems, respectively. PS-NH 2 restricted the roots-to-shoots translocation ability of IMI. PS-COOH enhanced IMI oxidation and nitro reduction, while PS-NH 2 inhibited 2-OH-IMI dehydrogenation to IMI-olefin in papyrus. Transcriptomics and gene network analysis identified the genes encoding CYP450 enzymes, reductases, hydrolases, dehydrogenases , and peroxidases as those influencing IMI biodegradation. These enzymes play a crucial role in the hydroxylation, dehydrogenation , reduction, and oxidation processes during biodegradation of IMI in the presence of NPs. This study expands the understanding of the impact of differently charged NPs on the IMI remediation efficacy of papyrus, thus providing new insights into the phytoremediation of organic contaminants in constructed wetlands.
研究领域:
环境科学
·
植物学
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毒理学
·
分子生物学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）