INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2017
·
IF 2.843
Liuyi Ren,Hang Qiu,Ming Zhang,Kaiyue Feng,Peng Liu,Jing Guo,Jian Feng
The effects of lead ions on the flotation performance of the cassiterite system have been investigated using microflotation tests. Adsorption experiments, X-ray photoelectron spectroscopy (XPS), contact angle measurement, and zeta (ζ)-potential measurements were conducted. Octanohydroxamic acid and lead ion solution speciation simulations were used. These were used to correlate surface properties of lead-activated with cassiterite flotation performance. Flotation results indicate that the addition of lead ions activates the cassiterite flotation. The addition of lead ions enhanced the adsorption of octanohydroxamic acid on cassiterite, and the wetting characteristic of cassiterite decreased in the presence of octanohydroxamic acid and the addition of lead ions. ζ-Potential measurements and solution chemistry analyses confirmed that flotation recovery of the cassiterite increases due to Pb(OH)+ and Pb3(OH)42+ sites on the cassiterite surface. XPS results indicated the adsorption of octanohydroxamic acid onto the cassiterite surface was through chemisorption, which combined with lead ions changed the chemical properties of the cassiterite surface.
研究领域:
矿物加工工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
E-POLYMERS
·
2022
·Vol. 22
·期 1
·399-410
·
IF 3.074
Jiawen Wang,Ye Sun,Xuemei Zhao,Lin Chen,Shuyi Peng,Chunxin Ma,Gaigai Duan,Zhenzhong Liu,Hui Wang,Yihui Yuan,Ning Wang
Although metal–organic frameworks (MOFs) own excellent uranium adsorption capacity but are still difficult to conveniently extract uranium from seawater due to the discrete powder state. In this study, a new MOF-based macroporous membrane has been explored, which can high-efficiently extract uranium through continuously filtering seawater. Through modifying the UiO-66 with poly(amidoxime) (PAO), it can disperse well in a N,N -dimethylformamide solution of graphene oxide and cotton fibers. Then, the as-prepared super-hydrophilic MOF-based macroporous membrane can be fabricated after simple suction filtration. Compared with nonmodified MOFs, this UiO-66@PAO can be dispersed uniformly in the membrane because it can stabilize well in the solution, which have largely enhanced uranium adsorbing capacity owing to the modified PAO. Last but not least, different from powder MOFs, this UiO-66@PAO membrane provides the convenient and continuously uranium adsorbing process. As a consequence, the uranium extraction capacity of this membrane can reach 579 mg·g −1 in 32 ppm U-added simulated seawater for only 24 h. Most importantly, this UiO-66@PAO membrane (100 mg) can remove 80.6% uranyl ions from 5 L seawater after 50 filtering cycles. This study provides a universal method to design and fabricate a new MOF-based adsorbent for high-efficient uranium recovery from seawater.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Luyan Li,Hao Li,Mingzhang Lin,Jun Wen,Sheng Hu
The amidoxime group has received widespread attention owing to its high affinity for uranium. Since this property was discovered, various amidoxime-based adsorbents have been developed for uranium adsorption. However, the effect of chain conformation on the uranium adsorption performance (in terms of adsorption capacity, stability, selectivity, etc.) of amidoxime adsorbents has rarely been studied. Herein, three amidoxime-based adsorbents with different chain conformations (linear, multi-armed, and rigid) were constructed via tert -butyl hydroperoxide-initiated surface graft polymerization by incorporating different monomer structures. Adsorption experiments revealed that the linear structure of P-E-PAO exhibited the highest adsorption capacity owing to the highest monomer-grafting ratio; the multi-arm structure of P-E-PMGO was affected by pH and ionic strength because of the most cyclic imide dioxime structure; and the rigid structure of P-E-PEBO showed the highest selectivity owing to the most open-chain amidoxime structure. These findings are expected to have strong implications in the optimization of adsorption material designs.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Biru Shi,Yinglu Sun,Xinxin Tian,Jiahui Zhong,Zhenyu Zhang,Xiangdong Liu,Dekun Sheng,Yuming Yang,Wenhua Zhang
Adhesives are widely used to bond various materials and surfaces, hot melt adhesives (HMAs) have conquered almost every industry area due to their solvent-free volatilization and ease of use. However, preparing reusable HMAs with high shear strength is still extremely challenging. Here, we show a simple way to prepare a reusable HMA, OPU (oxime-based polyurethane), with high lap shear strength based on oxime-urethane bonds. Cu(II) ions were introduced to further enhance the bulk strength to form ligand bonds. The relationship between the ligand bond content and the material properties was also investigated. Increasing ligand bond content limited the degree of crystallinity and shear strength. And the breaking stress and toughness of the coordinated material were significantly increased. The initial shear strengths of OPU for 304 stainless steel (after this referred to as “steel”) and aluminum reached 12.6 MPa and 9.3 MPa, respectively, which is the highest shear strength available for oxime-urethane-based polyurethane HMAs. After 10 repetitions, the OPU still retains its high shear performance. By analyzing the relationship between shear strength and the amount of Cu(II), it is found that the shear strength is strongly related to chain mobility and Young's modulus . This work demonstrates a useful way of synthesizing reusable HMAs with high lap shear strength.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
·
2023
·Vol. 111
·期 4
·1-9
·
IF 2.7
Zheng Handinghong,Wu Qiong,Wu Xiaomao
This study aimed to investigate the dissipation, residues and dietary assessment of kresoxim-methyl in the application of Rosa Roxburghii and soil field using liquid chromatography-tandem mass spectrometry (LC–MS/MS). The results show that kresoxim-methyl in R. roxburghii samples was extracted by acetonitrile and purified by ethyl enediamine-N-propylsilane (PSA), while kresoxim-methyl in soil samples was extracted by acetonitrile and purified by octadecylsilyl solid phase dispersant (C 18 ). 0.1% formic acid (v/v)-water–methanol solution was used as the mobile phase, LC–MS/MS exhibited a good linearity in the range of 0.001–10 mg L −1 . The recoveries of R. roxburghii and soil matrix were 82.48%–102.55%, and the relative standard deviation ( RSD) were 1.13%–4.21%. The limit of detection ( LOD ) and quantification ( LOQ ) of kresoxim-methyl in R. roxburghii and soil samples was 0.50 and 0.60 µg kg −1 , respectively. The dissipation dynamics of kresoxim-methyl in R. roxburghii and soil followed the first-order kinetics, with the half-life of 4.28 and 4.41 days, respectively. The terminal residual amount of kresoxim-methyl in R. roxburghii and soil samples was 0.003–1.764 and 0.007–2.091 mg kg −1 , respectively. The dietary intake risk assessment indicates that a risk quotient ( RQ ) for kresoxim-methyl based on the national estimated daily intake ( NEDI ) of 0.1995 mg was 0.79%, suggesting that the use of kresoxim-methyl on R. roxburghii at recommended dosage was safe to consumers. This study provides the theoretical basis for guiding the rational use of kresoxim-methyl in the production of R. roxburghii .
研究领域:
植物学
·
农业科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Peiwen Zhu,Yi Wang,Xue Bai,Jianming Pan
Highly efficient adsorption of radioactive uranium from seawater is a grand challenge of mounting severity as the energy demand increases. To address this, a salicylaldoxime functionalized raspberry-like microbeads sorbent is created to achieve highly efficient uranium adsorption via the CO 2 -in-Water Pickering emulsion-assisted polymerization-induced self-assembly method. The prepared raspberry-like microbeads sorbent with a high density of accessible functional groups exhibits the maximum uranium adsorption capacity of 41.02 mg g −1 within 30 min, the time required to reach adsorption equilibrium is shorter than most of the reported amine-oxime functionalized microsphere adsorbents. In addition, under the coexistence of high-concentration metals such as Na + , Mg 2+ , K + , Ca 2+ , etc., the raspberry-like microbeads sorbent still showed the best affinity for uranium, which is mainly benefit from the specific binding between amine oxime group and uranium. Our work not only provides a general strategy for the rapid and selective adsorption of uranium from seawater, but also provides a new perspective for the controlled assembly of NSs and the preparation of nano-hybrid materials combining the advantages of micro/nano structures.
研究领域:
材料科学
·
环境科学
·
核科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Ying Hu,Lingmin Lu,Shiman Guo,Xiaolan Wu,Jiayi Zhang,Chunsong Zhou,Haiyan Fu,Yuanbin She
A reversible fluorescent probe Pyr-1 was developed by integrating pyrene and oxime functional groups and applied for visual detection of Cysteine (Cys). By featuring three binding sites, Pyr-1 exhibited selective fluorescence quenching response towards Fe 3+ through the formation of 1:1 coordination complex. The ensemble Pyr-1-Fe 3+ was further applied to detect Cys. Among the various test species, Cys induced unique fluorescence enhancement through the decomplexation process. The detection of Cys exhibited a fluorescence “turn-off-on” phenomenon within 50 s and reversible cycle performed up to at least 32 times. The detection limit was calculated as 0.446 µM. Due to the excellent stability in wide pH range (2−11), Pyr-1-Fe 3+ was successfully applied in detection of Cys in diverse food samples. In practical applications, an obvious fluorescent color difference was observed on paper-based device modified by Pyr-1-Fe 3+ , which was convenient and could be used for on-site evaluation of Cys in food samples.
研究领域:
分析化学
·
食品科学
·
生物化学
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Douchao Mei,Lijia Liu,Huan Li,Yudan Wang,Fuqiu Ma,Chunhong Zhang,Hongxing Dong
Herein, a dual-function Zeolitic Imidazole Frameworks (ZIFs) ZIF-90 grafted with malononitrile by Knoevenagel reaction and following with an amidoximation reaction to form an efficient U (VI) adsorbent ( ZIF-90-AO ). The strong chelation power of amidoxime groups (AO) with uranium and ZIF-90 ’s mesoporous structure afforded ZIF-90-AO high maximum uranium adsorption capacity of 468.3 mg/g (pH = 5). In addition, the factors affecting uranium adsorption process were investigated by a batch of adsorption tests under different adsorption conditions. ZIF-90-AO displayed good selectivity to UO 2 2+ in the solution containing multiple co-existing ions and good regeneration property. More importantly, ZIF-90-AO showed excellent antimicrobial property against both E. coli and S. aureus . Therefore, ZIF-90-AO is a U-adsorbent with great application value for removing U (VI) from wastewater due to the high U (VI) adsorption capacity in weak acid condition and good anti-biofouling properties.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
PLANT DISEASE
·
2023
·Vol. 107
·期 11
·
IF 4.5
Qiuyan Bi,Fen Lu,Jie Wu,Xiuying Han,Wenqiao Wang,Jianjiang Zhao
Pear powdery mildew (PPM), caused by Phyllactinia pyri , is one of the most serious diseases affecting production in the Hebei pear-growing region of China. Iminoctadine trialbesilate and trifloxystrobin are known to have broad-spectrum activity against a wide range of plant pathogens, including P. pyri . A total of 105 P. pyri strains were isolated from 11 cities in Hebei Province from 2017 to 2019. Iminoctadine trialbesilate and trifloxystrobin significantly inhibited P. pyri growth. Microscopic observation showed that P. pyri mycelia had different degrees of desiccation and that the conidial cell contents had been released. The sensitivities of 60 P. pyri strains to iminoctadine trialbesilate and trifloxystrobin were determined in vitro, and the average EC 50 values were 0.5773 ± 0.0014 and 1.2038 ± 0.0010 μg/ml, respectively. The average EC 50 values for 85 and 75% of the strains with continuous single peak frequency distributions were 0.4534 ± 0.0012 and 0.8124 ± 0.0039 μg/ml, respectively. These data could be used as the baseline sensitivities of P. pyri to these two fungicides. The maximum difference multiples of the sensitivities of P. pyri strains from the different cities to iminoctadine trialbesilate and trifloxystrobin were 13.5- and 17.2-fold, respectively. Cluster analysis showed that there was no significant correlation between P. pyri sensitivity and geographical origin. The field efficacies in controlling PPM were higher than 85%. These findings can improve how we monitor iminoctadine trialbesilate and trifloxystrobin resistance and improve application efficiency.
研究领域:
植物病理学
·
农药科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2021
·
IF 4.354
Yinbo Wan,Yang Zhu,Haiyun Peng,Guisheng Deng
An efficient method for the preparation of tetrasubstituted furans, which contains a nitromethyl group at the 4-position, has been developed. The applications of 4-(nitromethyl)furans on the synthesis of highly functionalized bis(furyl)oxime were explored for the first time.
研究领域:
有机化学
·
药物化学
✓ 已验证
DOI
PubMed
高影响因子
Results in Surfaces and Interfaces
·
2025
·
IF 4.4
Zijing Bai,Yumeng Wang,Wei Shi,Peng Gao,Zengyun Jian
Protic ionic liquids (PILs) have been emphasized in recent years owing to their convenient synthesis routines and outstanding lubricity properties. In this work, amidoxime-based PILs were investigated as additives in PAO10. The tribological tests demonstrated that these newly synthesized PILs could highly improve the friction-reducing, anti-wear, variable-frequency and load-carrying capacity properties of PAO10. The results of contact angle, ECR, SEM-EDS and XPS analysis revealed that the tribofilm consisted of a physical absorption layer containing organic carbonaceous species and a tribochemical film containing Fe 2 O 3 , which is responsible for the significant improvement of tribological performances of PAO10.
研究领域:
材料科学
·
化学工程
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2025
·Vol. 226
·期 9
·2400493
·
IF 2.7
Ruotong Du,Guowen Zhou,Xiaohui Wang
It is highly desirable yet challenging to develop sustainable bio-based polyurethane with excellent mechanical properties, self-healing, and reprocessing abilities. In this study, a rigid bio-based diol (VO) containing oxime group is synthesized via the condensation reaction of lignin-derived vanillin and hydroxylamine. Subsequently, VO is introduced into a castor oil-based WPU (CWPU) system to prepare CWPU-VOs with high biobased content. The presence of dynamic oxime-carbamate bonds endowed CWPU-VOs with excellent self-healing (self-healing efficiency>95%, at 80 °C for 1 h,) and reprocessing properties. By adjusting the ratio of VO and castor oil, the mechanical properties of CWPU-VOs (tensile strength of 11.0–24.3 MPa, elongation at break of 642.2–312.0%) can be effectively tuned. In addition, due to the photolysis behavior of oxime-urethane moieties, CWPU-VOs show outstanding fluorescence anti-counterfeiting potential. This work provides a new idea for the development of high-performance waterborne polyurethane with adjustable mechanical properties, self-healing ability, and fluorescent properties.
研究领域:
材料科学
·
生物基材料
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）