FUEL
·
2022
·
IF 8.035
Haoqiang Sheng,Xiaobin Huang,Yuan Ji,Zhengchuang Zhao,Wenbin Hu,Junming Chen,Zemin Ji,Xiangzhao Wang,Hong Liu
Soot is carbonaceous particulate produced by incomplete combustion of hydrocarbon fuel, reducing the efficiency of energy utilization and affecting the environment and people’s health adversely. Naphthenic hydrocarbons are essential components in diesel and kerosene, generating great quantities polycyclic aromatic hydrocarbons (PAHs) and subsequently soot particles in the combustion process at high temperature. In this study, a new strategy of cycloalkane combustion at low temperature is developed to reduce the formation of the PAH soot-precursors in the combustion process to decrease soot emission. Borane-dimethyl sulfide (BDMS) and n- hexadecane were employed to promote the low-temperature ignition of cycloalkanes and the reduction of soot emission. By adding of 5% BDMS, the ignition temperature of hybrid fuel 10 (10 vol% n- hexadecane, 90 vol% cyclohexane) decreased drastically from 570 °C to 213 °C and PAH formation was reduced by 87%. In the flame development stage of the combustion process, the flame of BDMS/hybrid fuel 10 appears green in color and is larger than the blue flame in the stage of flame reduction, indicating the complete combustion of cycloalkane fuels. By this strategy of low-temperature combustion, the generation of PAH during combustion of cyclohexane decreases, thereby reducing the generation of soot and improving hydrocarbon fuels utilization.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Lantao Liu,Yaping Lu,Shuaize Wang,Yinghui Ding,Yaxin Chen,Daping Qiu,Dengke Wang,Jin Niu,Jiapeng Zhang,Xiaohong Chen,Huaihe Song
Heteroatom-rich carbon materials deliver superior potassium storage capacity owing to the abundant active sites, but their stability and conductivity are damaged because of the numerous defects and distortion of π-conjugated system. In this work, we amended the adverse influences of heteroatoms on carbon materials through the B, N stabilization effect. Due to an amending effect of B atoms on the N -doped carbon matrix, the integrity of the carbon skeleton and stability of the system are significantly enhanced, and the undesirable defects are transformed into favorable active sites, resulting in the simultaneous improvement of K + storage capacity, rate performance and cyclic stability. The stabilized materials have a highly reversible carbon structure and fast K + transfer kinetics, leading to high reversible capacity (300 mA h g −1 at 0.1 A g −1 ), good rate performance (107.2 mA h g −1 at 10 A g −1 ) and superior cyclic stability (75.3 % capacity retention from cycle 11 to 2000 at 1 A g −1 ). Consequently, the constructed devices perform excellent energy densities of 158.8 and 40.7 Wh kg −1 under power densities of 100 and 11250 W kg −1 , respectively. This work proposes an effective strategy for significantly improving heteroatom-rich carbon materials, which broadens its application fields in high-performance potassium ion storage.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AICHE JOURNAL
·
2022
·Vol. 68
·期 9
·e17760
·
IF 4.167
Liu Yang,Pengfei Yu,Wenyuan Li,Fengliang Cao,Xin Jin,Sheng Xue,Xianglong Zhang,Tingwei Zhang,Mingbo Wu,Wenting Wu
Hydrogen peroxide (H 2 O 2 ) has been listed as one of the 100 most important chemicals in the world. However, huge amount of residual H 2 O 2 is hard to timely decomposed into O 2 and H 2 O under acidic condition, easily resulting in explosion hazard. Here, we reported a core–shell structure catalyst, that is graphene with Co N structure encapsulated Co nanoparticles. Co N graphene shell serves as the active site for the H 2 O 2 decomposition, and Co core further enhance this decomposition. Benefiting from it, the H 2 O 2 decomposition were close to 100% after 6 cycles without pH adjustment, which increased 6 orders of magnitude compared with no catalyst. At the same time, the O 2 generation reached 99.67% in 2 h with little metal leaching, and ·OH has been greatly inhibited to only 0.08%. This work can cleanly remove H 2 O 2 with little deep oxidation and protect the process of H 2 O 2 utilization to achieve a safer world.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Siqi Zhuang,Jianhui Jia,Ying Lin,Yi He,Yu Liu,Hui Huang,Jian-Bo Chen
The analysis of N -oxide based explosives is beneficial to avoiding explosive risk and toxic hazard to the public. Nowadays, multifunctional sensors are scarce for green extraction and analysis of N -oxide based explosives. Herein, we have designed and developed two-in-one sensing solvents (DSMs) based on deep eutectic solvents with dual functions of both extraction and detection toward N -oxide based explosives. Besides, as an extraction solvent, DSM-3 based choline chloride and urea also can detect N -oxide based explosives via color change from yellow to red. The sensing mechanism of DSM-3 toward 2,6-diamino-3,5-dinitropyrazine-1-oxide (LLM-105) as a prototype of N -oxide-based explosives has been fully investigated by experimental analysis and theoretical calculations. The proposed mechanism is based on the formation of H-bonding complexes between urea of DSM-3 and N -oxide group of LLM-105, which induces the charge transfer from urea to LLM-105. Further, this assay exhibits high selectivity, sensitivity and good visualization for the determination of LLM-105. Therefore, our study provides novel two-in-one sensing solvent for green, convenient and on-site detection of N -oxide based explosives.
✓ 已验证
产品关联
DOI
高影响因子
CURRENT MICROBIOLOGY
·
2022
·Vol. 79
·期 6
·1-11
·
IF 2.343
Bao Jingjiao,Guo Dengkang,Jin Lei,Li Tiejun,Shi Hui
Vibrio fluvialis is a marine opportunistic pathogen that frequently causes diseases in aquatic animals and humans. V. fluvialis can produce quorum sensing signaling molecules to coordinate cell density-dependent behavioral changes, including N-acyl homoserine lactone (AHL), which acts as a vital mediator of virulence-associated gene expression. Currently, several AHL molecules in V. fluvialis have been detected via biological and physicochemical methods, although different detection approaches have generated diverse AHL profiles. Here, we describe the AHL-producing bacterium, V. fluvialis BJ-1, which was isolated from marine sediments from the East China Sea. V. fluvialis BJ-1 could stimulate AHL-mediated β-galactosidase synthesis of the biosensor Agrobacterium tumefaciens NTL4 (pZLR4) but could not induce violacein production in the AHL reporter strain, Chromobacterium violaceum CV026. This bacterial isolate exhibited strong AHL-producing activity at low cell density; however, the AHL activity declined when population density remained at high levels. Analysis of the AHLs by Ultra-High-Performance Liquid Chromatography tandem Mass Spectrometry demonstrated that V. fluvialis BJ-1 produced five different AHL signaling molecules, including two linear chain AHL products (C 8 - and C 10 -HSL), and three β-carbon-oxidative AHL products (3-O-C 8 -, 3-O-C 10 - and 3-O-C 12 -HSL). Significantly, the present study is the first to accurately define the AHL profile of marine V. fluvialis . In future, the coupling of UHPLC to ESI–MS/MS is expected to be utilized for the accurate determination of AHL profiles in marine Vibrio .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Qian Zhu,Huiqin Gao,Yiwei Sun,Yujia Xiang,Xiangjing Liang,Andrei Ivanets,Xiaoqin Li,Xintai Su,Zhang Lin
The synergistic effect of heteroatoms is a viable method to enhance the adsorption performance of heavy metal onto carbon-based materials. However, the high cost, complex operation and a lot of pollution from the synthesis process have limited its development. Herein, a facile two-step pyrolysis method is used to prepare in situ N and S doped porous biochar from paper mill sludge for the removal of Cr(VI) from aqueous environment. The NSC-450 sample prepared under the optimum conditions has a large specific surface area of 3336.7 m 2 g −1 , an average pore size of 2.56 nm and a total pore volume of 2.10 cm 3 g −1 , manifesting the excellent adsorption capacity of 356.25 mg g −1 for Cr(VI). The adsorption of Cr(VI) by NSC-450 is consistent with the Langmuir isotherm and pseudo-second-order model, suggesting a spontaneous and endothermic chemisorption process. The analysis results show that the NH, graphitic nitrogen and thiophene structures have a positive effect on converting a large amount of Cr(VI) to Cr(III) by synergistic reduction, indicating obviously facilitating Cr(VI) removal compared to other sites. Therefore, in this material, the strong adsorption mechanism is mainly reductive complexation. Moreover, the effects of real water quality, anions, cations and fulvic acid on the adsorption behavior of Cr(VI) onto the NSC-450 were further investigated. The results demonstrate that the chromium removal rate remains above 82% even in actual electroplating wastewater, suggesting NSC-450 has great practical application prospect. This work offered a feasible method for high-value utilization of sludge, but also provided a novel perspective for the future design of heteroatom-doped carbon materials for promoting to eliminate hexavalent chromium from water environment.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LUMINESCENCE
·
2022
·Vol. 37
·期 8
·1267-1274
·
IF 2.613
Qi Wang,Bin Zhu,Yejiao Han,Xin Yang,Yanan Xu,Ying Cheng,Taotao Liu,Jiana Wu,Shengling Li,Lifeng Ding,Jingjing Bai,Yulan Niu
In this work, carbon dots (CDs) was easily synthesized from aspartic acid through a pyrolysis method. Based on their favourable fluorescence properties, CDs were utilized to design a metal ion-mediated fluorescent probe for N -acetyl- l -cysteine (NAC) detection. The fluorescence intensity of CDs was firstly quenched by manganese ions (Mn 2+ ) through static quenching effect and subsequently restored by NAC via the combination with Mn 2+ due to the coordination effect. Therefore, the fluorescent turn-on sensing of NAC was actuated based on the fluorescence quenching stimulated by Mn 2+ and recovery induced by coordination. The fluorescence recovery efficiencies showed a proportional range to the concentration of NAC in the range 0.04–5 mmol L −1 and the detection limit was 0.03 mmol L −1 . Furthermore, this metal ion-mediated fluorescent nanoprobe was applied to human urine sample detection and the standard recovery rates were located in the range 97.62–102.34%. This was the first time that Mn 2+ was used to construct a fluorescent nanoprobe for NAC. Compared with other heavy metal ions, Mn 2+ with good biosecurity prevented the risk of application, which made the nanoprobe green and biopractical. The facile synthesis of CDs and novel metal ion-mediated sensing mode made it a promising method for pharmaceutical analysis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2022
·
IF 8.035
Xinru Wu,Xueqin Lei,Shidong Wang,Hongwei Zhang,Qingyan Cui,Xiaojun Bao,Tinghai Wang,Pei Yuan
Isomerization of alkane is one of the most important catalytic processes for producing environmentally friendly gasoline fraction with high octane number. However, the development of non-noble metal based catalysts with high conversion and selectivity towards multi-branched isomerized products is still challenging. Herein, we report that a NiP-Hβ/modified Kaolin catalyst was successfully prepared by ball-milling of amorphous NiP nanoparticles with Hβ/modified Kaolin composites and applied for n-hexane isomerization. The introduction of chemically modified Kaolin with abundant weak-medium acid sites and mesopores not only alleviates the cracking of isomerized products on the strong acid sites on Hβ, but also provides more active sites for the formation of di-branched isomerized products with high octane number. As a result, the NiP-Hβ/modified Kaolin catalyst shows an excellent catalytic performance for n-hexane isomerization in terms of good conversion (78.1%), high selectivity towards mono-branched (75.4%) and di-branched (21.4%) i-C 6 products, and high liquid yield (99.9%). This work paves the way to the development of high performance non-noble metal based catalysts for large scale production of clean gasoline.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Lei Nie,Jie Li,Guoqi Lu,Xiaoyan Wei,Yaling Deng,Shuang Liu,Shengping Zhong,Qimin Shi,Ruixia Hou,Yi Sun,Constantinus Politis,Lihong Fan,Oseweuba Valentine Okoro,Amin Shavandi
Temperature-responsive hydrogels exhibit great potentials to encapsulate cells for 3D bioprinting and tissue engineering applications; however, cell aggregation and the hydrogel stiffness determine cell fate and limit its application. Here, we developed a new temperature-responsive hydrogel with interpenetrating polymer networks using poly (N-isopropylacrylamide) (pNiPAM) and hydroxyethyl-chitosan (HECS) with the incorporation of dithiol-modified graphene oxide nanosheets (t-GO). The fabricated hydrogel showed excellent cytocompatibility toward human bone marrow mesenchymal stem cells (hBMSCs), and as expected, the lower critical solution temperature (LCST) could be regulated by changing the weight ratio of pNiPAM/HECS/t-GO. Finally, hBMSCs could be directly encapsulated in the hydrogel at a low temperature (around 20 °C), after then, the cell-laden hydrogel was formed above LCST and displayed high cell viability after 3D culturing. The results indicate that the new pNiPAM/HECS/t-GO hydrogel has the potential to serve as a cell carrier for drug delivery and tissue engineering applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Chao Liu,Peng-kai Fan,Xiao-qi Xie,Ying-jie Sun,Yan Li,Xiao-jing Wang
Generally, it is important to ameliorate the co-catalyst used in photocatalytic hydrogen evolution reactions (PHERs) to achieve efficient transfer and separation of photogenerated carriers, decrease the surface reaction energy barrier, and hence improve the photocatalytic activity . In this study, N-doped graphite carbon (GC) was introduced in situ to MoO 2 to ensure the presence of well-dispersed active sites, lower the overpotential of hydrogen evolution, and further achieve high conductivity. Then, the MoO 2 /GC composite obtained was used as a co-catalyst of ZnIn 2 S 4 (ZIS) in a PHER, resulting in a great improvement in the photocatalytic activity. Given the metallicity and large work function of MoO 2 /GC, a Schottky interface can form between MoO 2 /GC and ZIS, which accelerates the transmission of photogenerated electrons. As a result, the separation efficiency of photogenerated carriers improves, whereas the surface overpotential of PHERs clearly decreases for ZIS. This study proposes a new idea for exploiting efficient co-catalysts and promotes the wide and heavy use of carbon materials in the field of solar energy conversion .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Yuhui Sheng,Xingchen Sun,Jingtian Han,Wei Hong,Jie Feng,Shuyang Xie,Youjie Li,Fangwei Yan,Keke Li,Baocheng Tian
An N -acetylcysteine functionalized chitosan oligosaccharide-palmitic acid conjugate (NAC-COS-PA) with bioadhesive and permeation promoting properties was synthesized to enhance transocular drug delivery. Flurbiprofen (FB) loaded self-assembled NAC-COS-PA nanomicelles (NAC-COS-PA-FB) were prepared and the drug loading was 7.35 ± 0.32%. Human immortalized corneal epithelial (HCE-T) cell cytotoxicity and hen's egg test-chorioallantoic membrane assays confirmed that the conjugate had good biocompatibility. The transportation efficiency of coumarin-6 (C6) loaded nanomicelles in the HCE-T cell monolayer was approximately 1.97 times higher than that of free C6. Decreased intracellular Ca 2+ concentration and cell membrane potential , increased cell membrane fluidity , and reversible changes in the F-actin cytoskeleton are presumed to be responsible for the enhanced drug permeation. NAC-COS-PA exhibited strong binding capacity with mucin and rabbit eyeball. In vivo pharmacokinetics indicated that the area under the curve (AUC 0 – 6 h ) and the maximum concentration (C max ) of NAC-COS-PA-FB were approximately 1.92 and 2.44 times that of the FB solution, respectively. NAC-COS-PA-FB demonstrated the best in vivo anti-inflammatory efficacy compared to unfunctionalized nanomicelles (COS-PA-FB) and FB solution. Consequently, NAC-COS-PA appears to be a promising bioadhesive carrier for ophthalmic delivery.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYHEDRON
·
2022
·
IF 2.975
Si-Hui Tan,Zhao-Hui Chen,Huan Luo,Ting Liu,Guo-Qing Zhong
Two novel bismuth(III) complexes of the formulae (2-HMI) 4 [Bi 2 Cl 10 ] ( 1 ) and {(Hphen)[BiCl 4 ]} n ( 2 ) (2-MI = 2-methylimidazole, Hphen = 1,10-phenanthroline) were synthesized. The complexes were characterized by elemental analyses, X-ray diffraction, Fourier transform infrared spectra and thermogravimetry analysis. The X-ray crystallographic investigation reveals that 1 is ionic compound built of 2-methylimidazolium cations and binuclear metalate anions, [Bi 2 Cl 10 ] 4– . 2 is a coordination polymer, and its asymmetric structural units are connected by one Bi 3+ ion, four Cl – ions and one disordered and protonized Hphen + cation. In addition, the photocatalytic activities of 1 and 2 towards the degradations of Rhodamine B (RhB) and methylene blue (MB) were explored, and the mechanism of the photocatalytic degradation was also discussed. The results show that 1 and 2 are good candidates for photocatalytic degradation of RhB and 2 is also a good candidate for photocatalytic degradation of MB.
✓ 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）