MATERIALS CHEMISTRY AND PHYSICS
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2023
·
IF 4.6
Likun Huang,Xinyi Di,Guangzhi Wang,Yue Hou,Huixian Wang,Dandan Wang,Dongdong Wang
The use of multifunctional materials as catalysts for the removal of organic pollutants from water is an emerging means of degradation. In this study, LaCuO 3 was prepared by citric acid composite sol-gel method, new LaCu x Fe 1-x O 3 composites were prepared by doping with Fe elements to form a complete perovskite type structure, the apparent morphology, crystalline structure and elemental morphology of the materials after B-site doping were analyzed by XRD , SEM, BTE and XPS characterization. The optimal performance of the material was determined for the doping amount of Fe 3+ x = 0.4, at a gel temperature of 80 °C, a complexing agent dosage of 1:3, and a calcination temperature of 700 °C. After system preference, determined that the LaCuO 3 /PMS system has good catalytic degradation. And optimal reaction conditions were a reaction temperature of 50 °C, an initial pH of 4, PS:12COD = 1.2, and a catalyst dosage of 1 g/L. The cellulosic ethanol wastewater COD removal rate reached 91.64 %. The discharge standard of cellulosic ethanol wastewater was met. Therefore, this study can provide a reference for the treatment of cellulosic ethanol wastewater.
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ChemistrySelect
·
2023
·Vol. 8
·期 45
·e202303449
·
IF 2.1
Hang Yin,Chongchao Zhang,Xiao Bai,Ziyin Yang,Zhe Liu
Graphical The doping of B induced the formation of ultrafine Co nanoparticles and realized highly sensitivity non-enzymatic glucose sensing. Doping is one of the effective methods to improve the performance of sensors. Here, we reported that B-doping can induce the formation of ultrafine Co nanoparticles for realizing highly sensitivity non-enzymatic glucose sensing. Co/NC and Co/BNC were prepared by ion exchange and pyrolysis methods. It is interesting to find that B doping can achieve spatial isolation and prevent metal aggregation during MOF pyrolysis. This made the particle size of Co nanoparticles smaller and more uniform, which enriches the active site and thus improves the sensing performance for glucose. The electrochemical results indicate that Co/BNC exhibits strong electrocatalytic activity toward glucose oxidation and the non-enzymatic sensor based on Co/BNC shows excellent performance for glucose analysis with a wide linear range of 0.4 μM–0.522 mM, a high sensitivity of 1064.3 μA mM −1 cm −2 and a low detection limit of 0.08 μM (S/N=3). Therefore, this study demonstrated Co/BNC as a promising glucose sensing material and also provided a novel strategy for improving electrochemical sensing performance through doping.
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Biomass Conversion and Biorefinery
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2023
·
IF 4
Chen Jun Xiu,Li Jin Hao,Bao Agula
The development of porous carbon materials with high CO 2 adsorption capacity is crucial for addressing the current issues of industrial air pollution and global warming. In this study, B/N codoped porous carbon materials were prepared via a combined strategy involving the use of a self-sacrificing template in conjunction with potassium hydroxide activation; moreover, g-C 3 N 4 was used as the N source and boric acid was used as the B source. The pore structure and surface chemistry were investigated in detail using different techniques such as X-ray diffraction, scanning electron microscopy, N 2 adsorption and desorption, transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. Results showed that the prepared material exhibited the highest specific surface area (2278 m 2 /g) and pore volume (1.00 cm 3 /g) when the ratio of B/N sources was 1:0.5; moreover, its CO 2 adsorption value (3.26 mmol/g) was higher than those of most codoped adsorbents.
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JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2014
·Vol. 90
·期 6
·1144-1151
·
IF 2.494
Zhenfu Huang,Yuting Ye,Shun Zhu,Yuyuan Yao,Wangyang Lu,Wenxing Chen
BACKGROUND A novel heterogeneous Fenton-like catalyst (FePy-CFs) was prepared by supporting 4-aminopyridine iron (FePy) onto cellulose fibers (CFs) by covalent bonds for the rapid decoloration of Rhodamine B (RhB). RESULTS Compared with the use of homogeneous FePy alone, the introduction of CFs to FePy significantly enhanced the catalytic decoloration of RhB. In addition, repetitive tests revealed that FePy-CFs could maintain high catalytic activity in 15 successive runs, suggesting FePy-CFs has excellent sustaining catalytic ability. More importantly, compared with the traditional homogeneous Fenton reagent, the catalytic reaction could proceed over a wider range of pH values from acidic to alkaline. Various scavengers and probe compounds combined with electron paramagnetic resonance (EPR) technology had been used to identify the active species involved in the catalytic system. The results indicated that hydroxyl radicals (•OH), peroxy radicals (•HO 2 ) and high-valent iron (Fe(IV)) may be responsible for the decoloration of RhB. Furthermore, the effects of operational parameters and thermodynamic parameters have also been investigated. CONCLUSION This study not only opens a new perspective for the development of highly efficient catalytic systems, but also extends the potential applications of cellulose fibers in wastewater treatment. © 2014 Society of Chemical Industry
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Chemosensors
·
2023
·Vol. 11
·期 8
·453
·
IF 4.2
Kai Mao,Lili Tian,Yujie Luo,Qian Li,Xi Chen,Lei Zhan,Yuanfang Li,Chengzhi Huang,Shujun Zhen
Enzyme-linked immunosorbent assay (ELISA) is one of the most commonly used method for the detection of staphylococcal enterotoxin B (SEB), the main protein toxin causing staphylococcal food poisoning. However, the traditional ELISA reaction needs to be stopped by sulfuric acid to obtain stable colorimetric signal, and it is easily influenced by a colored sample. In order to address this problem, a new ELISA method using zeolite imidazolate skeleton-8 metal-organic framework (ZIF-8 MOF) as a light scattering (LS) reporter for SEB detection was developed in this work. ZIF-8 MOF has the characteristics of high porosity, large specific surface area, clear pore structure, and adjustable size, which is one of the most representative MOFs constructed from Zn2+and 2-methylimidazole (2-mIM). The 2-mIM ligand of ZIF-8 exhibited antioxidant activity and can strongly react with H2O2, which could destroy the structure of ZIF-8, resulting in the obvious decrease in LS intensity. We combined this specific reaction with the sandwich immune reaction to construct the LS ELISA method for the successful detection of SEB. This method is more reliable than commercial tests kits for the detection of colored samples, and it is simple, sensitive, and selective, and has great potential in the detection of other toxins by simply changing the corresponding recognition units.Keywords:ELISA;light scattering;metal organic framework;ZIF-8;staphylococcal enterotoxin B
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RSC Advances
·
2023
·Vol. 13
·期 31
·21537-21544
·
IF 3.9
Xingya Wei,Bangjun Han,Renzheng Gu,Weimin Geng,Naiyun Gao
Disinfection by-products (DBPs) formed in chlorination and chloramination are proved to be cytotoxic and genotoxic and arouse increasing attention. However, previous studies of DBP precursors mainly focused on free amino acids (AAs) and few papers evaluated DBPs' formation potential of combined AAs. This study demonstrated that typical carbonaceous (C-) DBPs, trihalomethanes (THMs) and typical nitrogenous (N-) DBPs, dichloroacetonitrile (DCAN), trichloroacetonitrile (TCAN) and trichloronitromethane (TCNM) could be formed during chlorination and chloramination of polymyxin B sulfate (PBS), a common polypeptide antibiotic working against Gram-negative bacterial infections. The effects of major parameters, including disinfectant dose, contact time, solution pH, temperature, bromide concentration and chloramination mode were evaluated in batch experiments. Different kinds of DBPs exhibited different characteristics as disinfectant dose or contact time increased. Solution pH and temperature affected the formation of DBPs greatly. The formation pathways of different DBPs from chlor(am)ination of PBS were also proposed. Combined AAs, such as PBS, were proved to be important precursors of DBPs during disinfections.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·
IF 3.9
Zhe Zhao,Cheng Han,Xiaozhou Wang,Yingde Wang
Metallopolymers containing refractory metal in the main chain are highly desired but rarely reported as oxygen-free single-source precursors for preparing ultrahigh-temperature ceramics. Herein, a novel single-source precursor of poly-hafnium-borocarbosilane (PHBCNS) with an Hf–N–B backbone molecular structure was synthesized through the dehalogenation reaction between HfCl 4 and B(NHCH 3 ) 3 . The polymeric Hf–N–B chain with large bond angle and conjugated molecular structure endowed the PHBCNS precursor to be relatively stable, dissolvable, and meltable. Subsequent precursor pyrolysis up to 1800°C resulted in an HfC/HfB 2 nanocomposite comprising an Hf content of 87.54 wt%, with the average grain size of HfC and HfB2 to be 34.9 and 74.1 nm, respectively. The ceramization mechanism and phase evolution from the PHBCNS precursor to HfC/HfB 2 composite ceramics were thoroughly investigated. This work not only highlights a novel Hf–N–B backbone polymer with high metal content and good shaping properties but also provides fresh insights of designing single-source precursors for ultrahigh-temperature composite ceramics.
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CHEMISTRY-A EUROPEAN JOURNAL
·
2023
·Vol. 29
·期 39
·e202300622
·
IF 4.3
Weijian Lu,Ping Zhu,Ying Zhao,Dujin Wang,Xia Dong
Graphical A series of healable alicyclic poly(ether- b- amide) multiblock copolymers (PEBA-I539, PEBA-I875, and PEBA-I1212), consisting of an asymmetric diamine (IPDA) with substantial steric hindrance, were successfully synthesized, and PEBA-I1212 with record-high strength and toughness for self-healing polyamide-based elastomers exhibited great prospects as a protective coating and flexible substrate for soft electronics. Self-healing polyamide multiblock copolymer with robust mechanical properties is highly desired. Here, an alicyclic diamine monomer, isophoronediamine (IPDA), with asymmetric structure and substantial steric hindrance was incorporated into the backbone of poly(ether- b -amide) multiblock copolymer. Based on the phase-lock effect, the mechanical properties and segmental mobility of copolymers can be modulated on a large scale via adjusting the molecular weight of hard segments. An extraordinary tensile strength of 32.0 MPa and an excellent elongation at break of 1881 % were simultaneously achieved, which leaded to a record-high toughness of 328.9 MJ m −3 for self-healable polyamide elastomers. The synergism between the dynamic H-bonding networks and the diffusion of polymer chains contributed to a balance between the mechanical performance and self-healing efficiency of copolymers. Due to the adjustable mechanical performance, rapid scratch self-healing ability and superior impact resistance, the resultant copolymers showed great potential in the fields of protective coatings and soft electronics.
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Water
·
2023
·Vol. 15
·期 11
·2015
·
IF 3.4
Feng Ouyang,Yujie Liu,Jiao Chen,Chenghan Tang,Aojie Wang,Yixin Lu,Yiping Yuan
Using rabbit manure as raw material, three distinct types of rabbit manure biochar (RBC400, RBC500, and RBC600) were prepared via pyrolysis at 400 °C, 500 °C, and 600 °C, respectively. The effects of pyrolysis temperature on the physicochemical properties of biochar were examined by scanning electron microscopy, Brunauer–Emmett–Teller analysis, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction techniques. Rabbit manure biochar was used to activate permonosulfate (PMS) to degrade rhodamine B (RhB). The findings revealed that RBC600 prepared at 600 °C showed the strongest catalytic activity due to its abundant pores and pore structure, high graphitization, and high carbonization degree. Under optimal reaction conditions (0.4 g/L PMS and 0.6 g/L RBC600), the degradation rate of 50 mg/L RhB reached 93.38% within 60 min. RBC600 can be effectively recovered, and effective catalytic activity can be sustained after five cycles. The quenching and EPR experiments showed that both free-radical (SO4−and ·OH) and non-free-radical (1O2) pathways contributed to the degradation of RhB, in which1O2performed a dominant role. In conclusion, the new PMS activator prepared in this study not only realizes the “waste to waste” use of manure waste but also provides technical support for the efficient resource-based treatment of organic wastewater.Keywords:rabbit manure;biochar;permonosulfate;advanced oxidation;rhodamine B
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CANCER BIOLOGY & THERAPY
·
2023
·
IF 3.6
Xiaojing Xing,Xuguang Wang,Meichen Liu,Qianxue Guo,Hongyue Wang
A GTPase binding protein, Ras interacting protein 1 (RASIP1), has been reported with a tumor-promoting role in lung cancer cells, and its role in lymphoma remains unknown. The analysis of medical databank shows that RASIP1 is upregulated in diffuse large B-cell lymphoma (DLBCL) specimens. In this article, we demonstrated that RASIP1 is highly expressed in DLBCL cell lines, compared with primary B cells. The gain- and loss-of-function experiments were performed to investigate the effects of RASIP1 on DLBCL cells. CCK-8, flow cytometry, western blot, and transwell assays demonstrated that silence of RASIP1 inhibited proliferation, cell cycle transition, and invasion and induced significant apoptosis in DLBCL cells, and ectopic expression of RASIP1 played opposite roles. Xenograft results revealed that RASIP1 facilitated the growth of DLBCL cells in vivo. These findings suggest that RASIP1 may be required for malignancy of DLBCL cells. In addition, we also found that the expression of RASIP1 was negatively regulated by forkhead box O3 (FOXO3), which has been reported to suppress the proliferation of DLBCL cells. Our results indicate that FOXO3 is bound to the promoter sequence of RASIP1 and inhibits its transcription. The suppressive effects of FOXO3 on proliferation and invasion of DLBCL cells were neutralized by RASIP1. In conclusion, we demonstrate that FOXO3 negatively regulated RASIP1 facilitates growth and invasion of DLBCL cells, provides novel diagnostic markers and therapeutic targets for DLBCL in clinic.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Danyu Lv,Muyun Wang,Wanjun He,Jieli Wu,Xiaoyue Liu,Yongguang Guan
Bixin has desirable bioactivities but poor water solubility, which limits its practical applications. Enzymatic transesterification of methyl to alditol groups in bixin by Candida antarctica lipase B (CALB) improves bixin water solubility. Herein, magnetic CALB nanoreactors with diameter of 11.7 nm and CALB layer thickness of 3.5 nm were developed by covalently linking CALB onto silicon covered Fe 3 O 4 nanoparticles. The CALB loading capacity in nanoreactors achieved 30%. The Michaelis constant ( Km ) and maximum reaction rate of magnetic CALB nanoreactors were 56.1 mmol/L and 0.2 mmol/(L·min). Magnetic CALB nanoreactors could circularly catalyze bixin-maltitol ester synthesis and keep catalytic efficiency of 62.6% after eight repetitive enzymatic reactions. Additionally, the optimal bixin-maltitol ester synthesis procedure was heating bixin-maltitol mixture at molar ratio of 1:7 in anhydrous 2-methyl-2-butanol-dimethylsulfoxide (8:2, v/v) at 50 °C for 24 h. Bixin-maltitol ester showed improved water solubility at pH 5.5 and 7.0.
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Small Methods
·
2023
·Vol. 7
·期 3
·2200925
·
IF 12.4
Tianliang Fang,Baoqi Li,Meng Li,Yuli Zhang,Zhangyan Jing,Yuan Li,Tianyuan Xue,Zhirang Zhang,Wenli Fang,Zhongda Lin,Fanqiang Meng,Liyan Li,Yang Yang,Xingding Zhang,Xin Liang,Shu-Na Chen,Jun Chen,Xudong Zhang
Immune intervention of B cell activation to blockade the production of autoantibodies provokes intense interest in the field of systemic lupus erythematosus (SLE) therapy development. Although the survival rate for SLE is improved, many patients die untimely. Engineered cell membrane vesicles manifest remarkable capacity of targeted drug delivery and immunomodulation of immune cells such as B cells. Herein, this work engineered cellular nanovesicles (NVs) presenting CD40 (CD40 NVs) that can blunt B cells and thus alleviate SLE. CD40 NVs disrupt the CD40/CD40 ligand (CD40L) costimulatory signal axis through the blockade of CD40L on CD4 + T cells. Therefore, the CD40 NVs restrain the generation of the germinal center structure and production of antibodies from B cells. Furthermore, immunosuppressive drug mycophenolate mofetil (MMF) is also encapsulated in the vesicles (MMF-CD40 NVs), which is employed to deplete immunocytes including B cells, T cells, and dendritic cells. Together, CD40 NVs are promising formulations for relieving autoimmunity and lupus nephritis in MRL/lpr mice.
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