INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Weiwei Lu,Yuan Zhang,Jinjin Zhang,Peng Xu
Photoelectrochemical (PEC) reduction of CO2 is a potential way to simultaneously address environmental problems and reduce the energy crisis. However, traditional conversion of CO2 in aqueous solution has serious drawbacks, such as low solubility, slow diffusion, and complicated existing form of CO2 in water, as well as the competitive H2 evolution from reduction of H2O, leading to unsatisfactory conversion efficiency and poor product selectivity. To overcome these problems, in this work, gas CO2 has been directly introduced to a flow cell, in which a membrane cathode assembly with Ag nanocube electrocatalysts is used. It is surprising to find that with this PEC reduction strategy, the product selectivity of CO can be substantially enhanced with the suppression of competitive H2 evolution. The control experiments and theoretical calculations suggest that the facile mass transfer of gas CO2 to the (100) plane of Ag nanocubes electrocatalysts and the suitable photocurrent density may account for such advantages.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2020
·
IF 2.029
Jianxia Zhang,Li Liu,Chao Sun,Xiaosong Li,Bing Zhao,Xiangnan Ju,Chunxia Tian,Dan Sun,Guijun Nian
The 3D layered α-Fe 2 O 3 microflowers assembled by pure and Sr-doped nanosheets were prepared by hydrothermal and annealing methods. SEM morphological characterization results show that after the introduction of Sr, the microflowers are assembled from more layered nanosheets. XPS indicates that the material can provide more surface oxygen vacancy defects and oxygen adsorption sites, which is beneficial to the improvement of gas sensitivity. The response of 3 wt% Sr-doped α-Fe 2 O 3 with alkaline earth metal element Sr to 100 ppm ethanol (82.1) is 2.37 times that of pure α-Fe 2 O 3 (34.5) to ethanol at low temperature (220 °C).
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
·
2020
·
IF 1.816
Kiran Abdullah,Xia Kong,Muhammad Imran,Ghulam Mustafa,Yanli Chen
A new hybrid material has been developed by mixing a sandwich-type double-decker, Eu[Pc(OC 4 H 9 ) 8 ] 2 = 2,3,9,10,16,17,23,24-octabutoxyphthalocyaninate] with acidified multiwalled carbon nanotubes (aMWCNTs) through non-covalent interactions. The UV-vis spectrum, X-ray diffraction and scanning electron microscope have been employed to reveal the J -aggregate mode and optimized morphology of Eu[Pc(OC 4 H 9 ) 8 ] 2 molecules in the Eu[Pc(OC 4 H 9 ) 8 ] 2 /aMWCNTs hybrid material. The gas-sensing devices based on this hybrid material are fabricated by a simple solvent-processing quasi-Langmuir–Shäfer (QLS) progress. The n -type and p -type response is shown by the Eu[Pc(OC 4 H 9 ) 8 ] 2 /aMWCNTs hybrid film at room temperature. The detection limit of the hybrid for ammonia and nitrogen dioxide gas is 0.5 ppm and 0.3 ppm, respectively.
✓ 已验证
产品关联
DOI
高影响因子
PLoS One
·
2020
·Vol. 15
·期 1
·e0227235
·
IF 2.74
Xindan Liu,Ying Zhang,Menghua Wu,Zhiguo Ma,Hui Cao
Schizonepetae Spica (SS), the dried spike of Schizonepeta tenuifolia Briq., is a traditional Chinese medicinal herb. According to the color of persistent calyx, SS is categorized into two classes: the yellowish-green-type and the brownish-type. Based on the chemometrics analysis of gas chromatography-mass spectrometry (GC-MS), a novel model of identifying and evaluating the quality of SS in different colors was constructed for the first time in this work. 20 batches SS samples of different colors were collected and used to extract essential oils. The average essential oils yield of SS in yellowish-green color was significantly higher than that of SS in brownish color from the same origin ( p <0.05). The GC-MS fingerprints of 20 batches SS samples whose correlation coefficients were over 0.964 demonstrated SS samples were consistent to some extent in spite of slightly different chemical indexes. A total of 39 common volatiles compounds were identified. Hierarchical clustering analysis (HCA), principal component analysis (PCA) and partial least-squares discriminate analysis (PLS-DA) were developed to distinguish SS samples characterized by different colors. Consistent results were obtained to show that SS samples could be successfully grouped according to their color. Finally, 4,5,6,7-tetrahydro-3,6-dimethyl-benzofuran and pulegone were detected as the key variables for discriminating SS samples of different colors and for quality control. The obtained results proved that SS of good quality were often yellowish-green and those of poor quality were often brownish.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMATERIALS
·
2020
·
IF 10.317
Qianglan Lu,Tong Lu,Min Xu,Lifang Yang,Yilin Song,Nan Li
Recent years have witnessed the blooming of gas therapy nanoplatforms, which emerged as a promising area for cancer therapy. However, uncontrolled or inadequate generation of gas and unclear therapeutic mechanisms, which were still regarded as big challenges to apply gas therapy into clinical. Here in, a gas treatment based on sulfur dioxide (SO 2 ) prodrug doped nanorattles was explored, which could not only inhibit superficial tumor but also deep tumor. A Benzothiazole sulfinate (BTS, a water-soluble SO 2 prodrug) doped rattle-structured rough nanocapsule with high drug payload (~80%) composed of gold nanorods cores and polydopamine (PDA) shell ( [email protected] , GPBRs) has been prepared. Taking advantages of excellent photothermal conversion ability as well as acidic condition in the tumor sites, SO 2 gas release could be precisely controlled by both photothermal and pH, thus realizing “collusion inside” gas therapy and “outside” photothermal therapy. In addition, the cytotoxic SO 2 was found to induce cell apoptosis accompanied by the upregulation of intracellular reactive oxygen species (ROS) levels and modulation of apoptosis-relative proteins such as p53, bcl-2, Bax and caspase-3. Such photothermal/pH triggered SO 2 gas therapy may provide an effective strategy to stimulate further development of deep tumor therapy.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MARINE AND PETROLEUM GEOLOGY
·
2019
·
IF 3.538
Peng Liu,Xiaofeng Wang,Ying Lin,Changjie Liu,Xiaofu Li,Wenhui Liu
Adsorption and desorption processes of shale gas possess particular characteristics compared to conventional natural gas. Previous studies conducted desorption experiments on fresh core samples to investigate the isotope and chemical fractionations during the desorption process. However, complete chemical and isotope fractionations cannot be obtained due to the loss of gases during the coring process. In this study, we utilized a modified experimental apparatus based on the fixed adsorption bed to conduct systematic desorption experiments in confined systems with different proportions of free and adsorbed gases. The results show that different adsorption capacities and non-synchronous desorption for alkane gas components are leading factors influencing chemical fractionation during the desorption process. Meanwhile, C 1 /C 2 and C 1 /(C 1 +C 2 ) vary with different proportions of adsorbed gases in the same adsorption matrix. Generally, isotope fractionation between the adsorbed and free phases during desorption follows the Rayleigh fractionation model. The linear correlations between proportions of adsorbed CH 4 and isotope fractionation factors can be applied to predict the proportions of adsorbed gases. Calculations show that on average 55% of hydrocarbon gases exist at adsorbed state in shale gas from Yanchang Formation of Ordos Basin.
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2019
·Vol. 26
·期 12
·1-8
·
IF 1.53
Chen Zhaoyu,Wang Zhe,Hou Lei,Wang Chunmei,Du Xinming,Liu Chang,Liu Wenchang,Li Haiqiang,Xu Jingmei
Poly (arylene ether ketone) containing different content of the amino groups (Am-PAEK) polymer membranes were prepared by nucleophilic polycondensation used as gas separation membranes. Am-PAEK was synthesized successfully confirmed by Fourier Transform Infrared (FT-IR). The glass transition temperature (T g ) of Am-PAEK membranes enhanced from 164.83 °C to 192.83 °C, and the XRD results showed that the crystallinity of the Am-PAEK membranes increased as the amino groups content increased. The tensile strength and young’s modulus of the Am-PAEK-10% achieved 44.10 MPa and 2053 MPa, respectively. All of the Am-PAEK membranes exhibited excellent thermal performance. The gas separation capability testing showed that the Am-PAEK-10% membrane showed higher pure gas permeability [P(CO 2 ) = 12.38] as well as ideal permselectivity [α(CO 2 /CH 4 ) = 21.34], the separation performance was closest the Robeson upper bound. It was due to that acid–base and hydrogen bond interactions between the amino groups and carbon dioxide exit in the membranes. Thus, the strategy of precise regulated the content of amino groups of Am-PAEK showed a prospective approach for high performance gas separation membranes.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Bio Materials
·
2019
·
IF 0
Yao Huang,Junqing Huang,Mingyang Jiang,Songjun Zeng
Gaseous therapy based on nitric oxide (NO) has emerged as a potential tumor therapy route. However, the development of a NO generator with precisely controlled NO releasing in the target site is still facing enormous challenges. Herein, a typical NO delivery platform by integrating the hollow structured polydopamine (PDA) coated Bi2S3 nanohybrids (denoted as H-Bi2S3@PDA) with a heat-sensitive S-nitrosothiol (RSNO) molecule was explored for near-infrared (NIR) light-responsive on-demand NO-releasing and synergetic gas/photothermal combination therapy of tumors. The designed H-Bi2S3@PDA nanocomposites hold high photothermal conversion efficiency of 46.13% under irradiation of a NIR laser, leading to NIR light-triggered controllable generation of NO gas via breaking the S–NO bonds of the heat-sensitive RSNO molecules. More importantly, synergistic gas/photothermal therapy of the tumor was also achieved, which presented remarkable inhibition growth and ablation of tumors. These findings provide the opportunity to design a NIR light-activated NO generator with a combination of photothermal materials and heat-sensitive molecules for integrative gas/photothermal therapy in deep tumors.
✓ 已验证
产品关联
DOI
PubMed
CARBON
·
2022
·
IF 11.307
Haojie Li,Qiang Zhang,Zhixuan Xie,Bingyu Zhao,Yuxiu Yu,Yaodong Liu
Simultaneously enhancing the gas permeability , selectivity and aging stability of carbon molecular sieve membrane (CMSM) is extremely difficult. Facing such poser, a novel silicon doped CMSM at molecular level was prepared by copolymerizing siloxane with single Si– O –Si unit into the backbone of polyimide (PI). This can effectively avoid prior separated structure or multiple Si– O –Si structures and strongly alter the chains packing and thermostability of PI, finally determine the pore structure and thermodynamic behavior . The simple design adjustment simultaneously exhibits the triple enhanced effects on the gas permeability, selectivity and aging stability. The best molecule doped CMSM exhibits the ultra-high H 2 permeability (12482 Barrer, 87% higher), 26% higher H 2 /CH 4 selectivity, and 32% higher H 2 /N 2 selectivity than pure PI based CMSM. Additionally, such CMSM also has a much better aging stability than pure CMSM and most reported CMSMs . After stabilization, it still maintains a high H 2 permeability (8000 Barrer). And the hyper-aging CMSM also exhibits a good aging resistance showing a H 2 permeability of 5300 Barrer, as well as high selectivity of H 2 /CH 4 (125) and H 2 /N 2 (106) after 35 days. This work opens a new way on designing CMSM with excellent performance through heteroatom doping to need future application.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 48
·22869-22875
·
IF 3.591
Bingyan Han,Jingmei Jiang,Qifang Yan,Jing Zhao,Ze Xin,Qin Yan,Gaohong He
Carbon dots (CDs) have been studied for years as one of the most promising fluorescent nanomaterials. Herein, fluorescent CDs excited by visible light emitted red fluorescence with a quantum yield of 32.8% via a facile hydrothermal treatment. In addition to being applied in cell imaging, the as-prepared CDs were also utilized in the detection of ammonia and formaldehyde in aqueous solutions because of their pH-dependent properties, with a low limit of detection of 3.7 nM and 44 μM, respectively. Furthermore, we synthesized flexible and transparent fluorescence films by mixing the as-prepared CDs and PVB powder, which can be utilized to directly detect ammonia gas under visible light according to significant colour changes. Therefore, the as-prepared CDs would have more prominent and influential application in clinical diagnostics and environmental analysis.
✓ 已验证
产品关联
DOI
高影响因子
Asian Journal of Pharmaceutical Sciences
·
2023
·
IF 10.2
Min Zhong,Peiqin Liang,Zhenzhen Feng,Xin Yang,Guang Li,Rui Sun,Lijuan He,Jinxiu Tan,Yangpengcheng Xiao,Zhiqiang Yu,Muhua Yi,Xuefeng Wang
Ovarian cancer (OC) is one of the most common and recurring malignancies in gynecology. Patients with relapsed OC always develop "cascade drug resistance" (CDR) under repeated chemotherapy, leading to subsequent failure of chemotherapy. To overcome this challenge, amphiphiles (P1) carrying a nitric oxide (NO) donor (Isosorbide 5-mononitrate, ISMN) and high-density disulfide are synthesized for encapsulating mitochondria-targeted tetravalent platinum prodrug (TPt) to construct a nanocomposite (INP@TPt). Mechanism studies indicated that INP@TPt significantly inhibited drug-resistant cells by increasing cellular uptake and mitochondrial accumulation of platinum, depleting glutathione, and preventing apoptosis escape through generating highly toxic peroxynitrite anion (ONOO − ). To better replicate the microenvironmental and histological characteristics of the drug resistant primary tumor, an OC patient-derived tumor xenograft (PDX OC ) model in BALB/c nude mice was established. INP@TPt showed the best therapeutic effects in the PDX OC model. The corresponding tumor tissues contained high ONOO − levels, which were attributed to the simultaneous release of O 2 •− and NO in tumor tissues. Taken together, INP@TPt-based systematic strategy showed considerable potential and satisfactory biocompatibility in overcoming platinum CDR, providing practical applications for ovarian therapy.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Rock Mechanics and Geotechnical Engineering
·
2026
·
IF 10.8
Ying-Zhen Li,Zhen Jiang,Xian-Lei Fu,Zhe-Yuan Jiang,Yang Xu,Yan-Jun Du
Biopolymers are increasingly being employed to reduce engineered barrier permeability and to control the migration of contaminants in soils or groundwater. This study evaluated the effects of sol-gel conversion in pore fluid on the gas permeability of compacted biopolymer-amended clayey soil. The sol-gel conversion was implemented using divalent calcium (Ca 2+ ) and trivalent chromium (Cr 3+ ) ions as bridging cations and xanthan gum (XG) as the source material of gel matrix. The chemical features and morphology of XG gels were characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, zeta potential, and particle size measurements. The strength and viscosity of XG gels were assessed. The results showed that the strength of XG gels initially increased and then decreased as concentration rose from 10 to 200 mM. With Ca 2+ and Cr 3+ concentrations of 50 mM and 10 mM, respectively, the viscosity of the 0.5 wt.% XG gel increased to 35 Pa s and 87 Pa s, which are approximately 2 and 5 times larger than that of the 0.5 wt.% XG solution (18 Pa s). Additionally, the gas permeability tests were conducted on the compacted XG-amended soils immersed in Ca 2+ /Cr 3+ solutions and cured under standard condition. The gas permeability of the XG-amended soil specimen immersed in the 10 mM Cr 3+ solution was measured to be 1.0 × 10 -15 m 2 , which is approximately one-quarter of that of the specimen (4.5 × 10 -15 m 2 ) immersed in deionized water and one-half of that of the specimen immersed in the 10 mM Ca 2+ solution (2.0 × 10 -15 m 2 ), highlighting the role of sol-gel conversion in improving gas barrier performance.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）