SCIENCE OF THE TOTAL ENVIRONMENT
·
2019
·
IF 5.589
Fuwei Sun,Haibo Liu,Hanlin Wang,Daobing Shu,Tianhu Chen,Xuehua Zou,Fangju Huang,Dong Chen
Natural iron-bearing minerals have been proven to be effective for activating H 2 O 2 to produce OH, which can be used to degrade organic pollutants . In this study, the performance of siderite to degrade sodium sulfadiazine via catalytic H 2 O 2 degradation was investigated at different solution pH values from 3 to 9. An interesting discovery was made: the performance of the siderite-H 2 O 2 system was excellent under acidic, neutral, and even alkaline conditions. The influence of various factors (e.g. initial concentration, anions, natural organic matters, etc.) on the system under different pH conditions was investigated, which confirmed that siderite exhibited an excellent catalytic performance. By combining EPR characterization with scavenger research, it was proposed that dissolved iron (Fe 2+ ) mainly initiated the homogenous Fenton reaction to degrade pollutants under acidic conditions, while structural Fe 2+ species present in siderite triggered Fenton-like reactions under neutral or even alkaline conditions. From the SEM and XPS characterizations, oxidation and dissolution of Fe 2+ on the surface were also observed, confirming our inference concerning the different reaction mechanisms. The experimental findings show that this siderite-H 2 O 2 system can be used in solutions with pH values from 3 to 9 and that siderite plays a positive role in soil and groundwater remediation when H 2 O 2 is used as an oxidant.
研究领域:
环境科学
·
化学
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2020
·Vol. 60
·期 11
·2804-2813
·
IF 1.917
Cong Xie,Fan Leng,Zhen Dong,Weilin Xu,Mengjiao Zhu,Kangjun Xie,Jifu Du,Long Zhao
Two novel flame retardant and anti-dripping PE films were successfully synthesized in three steps. PE-g-GMA film was first prepared by simultaneous electron beam irradiation to graft glycidyl methacrylate (GMA) onto PE film. 4,4′-[1,4-phenyl-bis(9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-yl)dimethyneimino)]diphenol (DOPO-t) and 4,4′-[1,3-phenyl-bis (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-yl)dimethyneimino)]diphenol (DOPO-m) were then fabricated via a one-pot method. Finally, two DOPO derivative functionalized PE films were obtained through the ring opening reactions of PE-g-GMA film with DOPO-t and DOPO-m, respectively. Combustion properties, flame retardancy, thermal performance, and thermal shrinkage of these films were evaluated. Compared with pure PE film, the burning rate of anti-dripping DOPO-t/DOPO-m functionalized PE films was reduced by 13.2% and 50.0%, and the limiting oxygen index value climbed to 18.5 and 19.5, respectively. The residual chars from DOPO-t/DOPO-m functionalized PE films at 700°C were increased, and the shrinkage ratio decreased remarkably, which could effectively prevent the spread of fire. We also discussed the effect of structural difference between DOPO-t and DOPO-m on the above properties and the flame retardant mechanism of two DOPO derivative functionalized PE films preliminarily. This work provides a method for introducing DOPO derivatives into PE molecules to improve their flame retardancy and anti-dripping properties.
研究领域:
材料科学
·
化学工程
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Hu Li,Hongbin Lin,Xiaohui Liao,Weiqin Huang,Jinrui Cai,Limei Lin,Dong Wei,Zhiping Huang,Zhigao Huang,Shuiyuan Chen,Wei Zhang,Guilin Chen
Cadmium sulfide (CdS) persists as the standard electron transport layer (ETL) in high-efficiency Sb 2 (S,Se) 3 solar cells. However, its narrow bandgap imposes critical performance limitations through parasitic short-wavelength absorption and interface mismatch. Here, this bottleneck is shattered through an innovative in situ ozone doping strategy. This approach revolutionizes CdS ETLs by simultaneously: 1) Widening the bandgap of CdS ETL to drastically suppress parasitic short-wavelength photon loss; 2) Triggering a hexagonal-to-cubic phase transition that disrupts coherent Sb 2 O 3 impurity growth during Sb 2 (S,Se) 3 deposition; and 3) Engineering an oxygen-rich, defect-resistant FTO/CdS interface (DFT-validated), thereby slashing recombination and enabling superior carrier extraction. As a result, a certified world-record power conversion efficiency of 9.0% for carbon-based Sb 2 (S,Se) 3 solar cell is achieved ( V OC of 0.4908 V, J SC of 26.88 mA cm −2 , and FF of 68.19%) using an FTO/CdS:O/Sb 2 (S,Se) 3 /PbS/carbon configuration. This work, beyond setting a new benchmark for carbon-based Sb 2 (S,Se) 3 solar cells, shows that these devices demonstrate exceptional intrinsic stability under long-term and extreme damp-heat conditions without encapsulation, thus propelling Sb 2 (S,Se) 3 technology toward commercial viability.
研究领域:
材料科学
·
光伏技术
·
半导体物理
·
界面工程
·
能源材料
·
纳米结构调控
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DOI
高影响因子
Nutrients
·
2023
·Vol. 15
·期 6
·1522
·
IF 5.9
Jiyong Yin,Jiangping Niu,Junsheng Huo,Jing Sun,Jian Huang,Chaoqun Sun
We attempted to construct and evaluate a novel detection method to realize simultaneous detection based on a multiplex liquid protein chip technique for nine nutrition-and-health-related protein markers to meet the requirement of an accurate, simultaneous and comprehensive analysis of the proteomics of nutrition and health. The lower limits of detection, biological limits of detection and regression equations of serum ferritin (SF), soluble transferrin receptor (sTfR), c-reactive protein (CRP), retinol-binding protein4 (RBP4), apolipoprotein B (ApoB), alpha-fetoprotein (AFP), prealbumin (PA), carcino-embryonic antigen (CEA) and D-Dimmer (D-D) were determined after a series of optimal experiments. Then, the results of the methodological evaluation for this novel method indicated that the accuracies were between 70.12% and 127.07%, the within-run precisions were between 0.85% and 7.31%, the between-run precisions were between 3.53% and 19.07%, the correlation coefficients between this method and other methods were above 0.504 (p< 0.05), and the direct bilirubin (DBIL) of low concentration and the indirect bilirubin (IBIL) of high concentration could not interfere with the detected results of nine indicators. The novel multiplex detection method, which can increase accuracy and improve the ability of comprehensive analysis, can basically meet the requirement of detection and the diagnosis of the proteomics of nutrition and health.Keywords:liquid protein chip;nutrition and health;protein marker;multiplex detection
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PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Zhengwen Wei,Xiang-fei Lü,Wei Wang,Giuseppe Mele,Zhen-Yi Jiang
Phenanthrene (PTH) and 9-phenanthrol (9-PTH) exhibited severe health threats and ecological hazards, for this reason, exploring a high-efficient removing strategy for PTH and 9-PTH could be considered of great urgency. Herein the 4,4'-biphenyldicarboxaldehyde m-phenylenediamine Schiff base magnetic polymer (magnetic BIPH-PHEN) was successfully fabricated via Schiff base polycondensation reaction and the subsequently one-pot embedded method. The mutual aromatic nucleus of BIPH-PHEN polymer and PTH/9-PTH could form π–π interaction, thus improving the capture ability, the embedded Fe 3 O 4 nanoparticles provided the possibility for rapid separation. The physical and chemical properties of the magnetic BIPH-PHEN were systematically characterized. The removal rate of magnetic BIPH-PHEN towards PTH and 9-PTH was 85.65 % and 98.52 %, respectively (PTH or 9-PTH: 8 mg/L; Adsorbent: 0.2 g/L). The DFT calculations including energy calculations and electrostatic potential distribution analyzed the different bonding modes and proposed the most possible bonding modes in the adsorbent/adsorbate system. Moreover, the LUMO and HOMO orbits combined with energy gaps analysis proved the existence and specific types of the π–π interaction. The monolayer adsorption occurred on the homogeneous magnetic BIPH-PHEN surface, simultaneously the chemisorption was dominant. This work not only proposed new sights on assembling magnetic Schiff base polymer for removing polycyclic aromatic hydrocarbons, but also provided a deeper understanding of intramolecular interactions.
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DOI
PubMed
高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 18
·e202204785
·
IF 2.1
Tianhao Ma,Haixu Li,Xiaoguang Liu,Haobo He,Tiannan Jiang,Junsheng Wang,Bin Li,Wendong Xue,Shubin Ren,Jialin Sun
Graphical To activate peroxymonosulfate (PMS) and degrade dyes, composite catalysts containing cobalt, nitrogen-doped porous carbon and carbon nanotubes (CNTs) were prepared. The catalyst (CNT@ZIF-800) showed faster degradation rates towards congo red (98.5 %, 5 min) and slower rates towards rhodamine B (90.7 %, 30 min) than methylene blue (94.8 %, 30 min). It had 14.5 % more Co−Nx/pyridinic-N sites than C-ZIF-800. Such sites, together with cobalt and CNTs, had activated PMS into 1 O 2 , SO 4 − ⋅ and ⋅OH, which were primary and secondary dye degradation species. To activate peroxymonosulfate (PMS) and degrade methylene blue (MB), cobalt and nitrogen-doped porous carbon composite catalysts were prepared through pyrolysing zeolitic imidazolate framework ZIF-9 and dicyandiamide (DCDA) at 700–900 °C with various mass ratios. Powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and Brunauer-Emmett-Teller results showed that Co, porous carbon and carbon nanotubes (CNTs) co-existed in the catalyst prepared at 800 °C with a ZIF-9/DCDA ratio of 1 : 3. Thermogravimetric analysis suggested that CNT@ZIF-800 had a higher ratio of graphitic to turbostratic carbon than CNT@ZIF-700. It had degraded 94.8 % MB within 30 min, which was about 1.9 times faster than its counterpart C-ZIF-800. It also showed faster degradation rates towards Congo red (98.5 %, 5 min) and slower rates towards rhodamine B (90.7 %, 30 min) than MB. Furthermore, XPS revealed that it had 14.5 % more Co−Nx/pyridinic-N active sites than C-ZIF-800. EPR suggested that 1 O 2 might be the primary catalytic species whereas the SO 4 − ⋅ and ⋅OH the secondary ones. The formation mechanism of such active species might be originated from the synergistic activation of PMS by CNTs, Co−Nx/pyridinic-N and abundant Co sites in the CNT@ZIF-800. This work not only provided efficient Fenton-like catalysts for MB degradation, but also clarified the catalytic mechanism.
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DOI
高影响因子
JOURNAL OF OBSTETRICS AND GYNAECOLOGY RESEARCH
·
2021
·Vol. 47
·期 6
·2196-2203
·
IF 1.73
Lianhua Wang,Qiming Huang,Qingqing Lin,Lvxuan Chen,Qiyang Shi
Aim Endometrial cancer (EC) is a common type of malignant gynecological cancer. Small nucleolar RNA host gene 9 (SNHG9) has been discovered to serve a role in several types of cancer; however, the role of SNHG9 in EC remains unclear. The present study aimed to investigate the effects of lncRNA SNHG9 on cell proliferation and glycolysis in EC cells. Methods SNHG9 and hexokinase 2 (HK2) mRNA expression levels were measured by reverse transcription-quantitative PCR. Glucose consumption and lactate production were detected by the glycolysis cell-based assay kit. Cell Counting Kit-8 and colony formation assays were conducted to detect cell proliferation. The knockdown experiments of SNHG9 and HK2 were carried out by transfection of corresponding small interference RNAs (siRNA). The SNHG9-overexpressed plasmid was transfected into the cells to upregulate SNHG9. HK2 protein levels were analyzed by western blotting assay. Results SNHG9 expression levels were significantly upregulated in EC tissues and cells. The knockdown of SNHG9 subsequently effectively attenuated cell proliferation and glycolysis in vitro, while SNHG9 overexpression reported the opposite effects. Notably, the transfection of 2-DG partially reversed the promoting effect of SNHG9 on glycolysis. Downregulation of HK2 markedly decreased cell proliferation and glycolysis in EC cells antagonized SNHG9. Conclusion Either downregulation of SNHG9 or HK2 inhibits EC cell proliferation and glycolysis via repressing EC cell proliferation and glycolysis.
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DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2019
·
IF 6.864
Zhenghong Guo,Zilu Wang,Zhengping Fang
Fullerene (C 60 ) is readily to capture chain radicals and delays the scission of macromolecular chains during the degradation or combustion of polymers, because of its high reactivity with free radicals. In this work, C 60 was functionalized with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO), trying to combine their free radical-trapping effects both in gaseous phase and in condensed phase. Through an addition reaction between C 60 and DOPO, DOPO has decorated onto the surface of C 60 via P–H bond at the molar ratio of 1:1. From the images of transmission electron micrographs (TEM) and scanning electron microscopy (SEM), the introduction of DOPO onto C 60 surface prevented C 60 from clumping together and achieved a looser morphology. Thermogravimetry (TG), differential scanning calorimetry (DSC) and cone calorimetry measurements showed that compared with pristine C 60 , DOPO- d -C 60 further increased the anti-oxidative properties and restrained the combustion process of polypropylene .
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高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Xiaoyan Zhou,Qianqian Zheng,Changyong Wang,Jiake Xu,Jian-Ping Wu,Thomas Brett Kirk,Dong Ma,Wei Xue
The drug/gene codelivery is a promising strategy for cancer treatment. Herein, to realize the codelivery of docetaxel and MMP-9 siRNA plasmid efficiently into tumor cells, a star-shaped amphiphilic copolymer consisting of hyperbranched polyglycerol derivative (HPG-C18) and dendritic poly(l-lysine) (PLLD) was synthesized by the click reaction between azido-modified HPG-C18 and propargyl focal point PLLD. The obtained HPG-C18-PLLD could form the nanocomplexes with docetaxel and MMP-9, and the complexes showed good gene delivery ability in vitro by inducing an obvious decrease in MMP-9 protein expression in MCF-7 cells. The apoptosis assay showed that the complex could induce a more significant apoptosis to breast cancer cells than that of docetaxel or MMP-9 used alone. In vivo assay indicated that the codelivery strategy displayed a better effect on tumor inhibition. Moreover, HPG-C18-PLLD displayed lower toxicity as well as better blood compatibility compared to polyethylenimine PEI-25k, which may be the result of that HPG-C18-PLLD showed the comparative MMP-9 delivery ability in vivo compared with PEI-25k even if it showed the slight lower transfection efficiency in vitro. Therefore, HPG-C18-PLLD is a safe and effective carrier for the codelivery of drug/gene, which should be encouraged in tumor therapy.
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DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2018
·
IF 8.173
Weilu Liu,Haifeng Li,Shangmin Yu,Jiaxing Zhang,Weihua Zheng,Liting Niu,Gengen Li
In this work, we reported the synthesis of 3, 6-diamino-9-ethylcarbazole and its application as a new monomer for preparation of molecularly imprinted polymer (MIP) electrochemical sensor . The as prepared MIP sensor exhibited ultrahigh sensitivity and selectivity for the detection of 17-β-estradiol in attomolar levels (1 × 10 –18 mol L −1 ). The sensor works by detecting the change of the interfacial impedance that is derived from recognition of 17-β-estradiol on the MIP layer. The MIP sensor based on 3, 6-diamino-9-ethylcarbazole monomer revealed better performance than that of unmodified carbazole monomer. The monomer/template ratio, electropolymerization scanning cycles, and the incubation pH values were optimised in order to obtain the best detection efficiency. Under the optimised condition, the MIP sensor exhibits a wide linear range from 1 aM to 10 μM (1 × 10 –18 ̶ 1 × 10 −5 mol L −1 ). A low detection limit of 0.36 aM (3.6 × 10 –19 mol L −1 ) and a good selectivity towards structurally similar compounds were obtained. The proposed MIP sensor also exhibits long-term stability and applicability in human serum samples. These advantages enabled this MIP sensor to be a promising alternative of electrochemical sensor and may be extended to detection of other endogenous compounds .
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PubMed
高影响因子
BIOMATERIALS
·
2014
·
IF 8.312
Dong Ma,Qian-Ming Lin,Li-Ming Zhang,Yuan-Yuan Liang,Wei Xue
The co-delivery of drug and gene has become the primary strategy in cancer and other disease therapy. To co-deliver hydrophobic drug and functional gene efficiently into tumor cells, a star-shaped copolymer (PP-PLLD-Arg) with a photochemical internalization effect consisting of a porphyrin (PP) core and arginine-functionalized poly( l -lysine) dendron (PLLD-Arg) arms has been designed, and used to co-deliver docetaxel (DOC) and MMP-9 shRNA plasmid for nasopharyngeal cancer therapy. It was found that PP-PLLD-Arg/MMP-9 nanocomplex showed the photo-enhanced gene transfection efficiency in vitro , and could mediate a significant reduce of MMP-9 protein expression in HNE-1 cells. For co-delivery analysis, the obtained PP-PLLD-Arg/DOC/MMP-9 complexes could induce a more significant apoptosis than DOC or MMP-9 used only, and decreased invasive capacity of HNE-1 cells. Moreover, the star-shaped copolymer exhibited better blood compatibility and lower cytotoxicity compared to PEI-25k in the hemolysis and MTT assays , and also showed a good biocompatibility in vivo . Therefore, PP-PLLD-Arg with suited irradiation is a promising non-toxic and photo-inducible effective drug and gene delivery strategy, which should be encouraged in tumor therapy.
研究领域:
药学
·
生物医学工程
·
癌症研究
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DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 70
·66215-66223
·
IF 3.289
Fa-Shuo Shan,Jia-Ping Lai,Hui Sun,Ping Zhang,Chong Luo,Yan-Hui He,Huan-Ran Feng
A fast responsive and highly selective mercury(II) sensor was developed using the fluorescence quenching mechanism of 2,9-dimethyl-1,10-phenanthroline (2,9-DMP) towards mercury(II). Furthermore, two kinds of metal–organic frameworks (MOFs) of 2,9-DMP–Hg(II) have been synthesized and characterized by X-ray diffraction. The probe 2,9-DMP exhibited a fast and highly selective response to mercury(II) ions in aqueous solution, showing a good linear relationship over the concentration range of 0.050–2.0 μM for Hg(II) with R2 = 0.9994. The established procedure was used to monitor the concentration of mercury(II) in drinking water and Zhujiang River water samples with satisfactory recoveries of 85.42–101.5% and 81.72–96.09%, respectively. Furthermore, the fluorescence quenching mechanism of 2,9-DMP by mercury(II) was investigated and clarified by the data of single crystal X-ray diffraction of MOFs and the Job's plot analyses of 2,9-DMP towards Hg(II).
研究领域:
分析化学
·
环境科学
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）