CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Guanghong Luo,Zihuang Li,Meili Chen,Jiezhou Zheng,Xiaonian Deng,Gang Xu,Mo Cheng,Xianming Li,Yanhong Duo
The mitochondria critically determine the cell fates and therapeutic interventions. Contrary to the conventional and prevalent nanomaterial-based antitumor strategy, this study proposed a novel synergistic solution that accomplied with a dual tumor and mitochondria-specific [email protected] &SNP-TPP&FA (BCS) platform. The Ce6 and SNP were released in response to the tumor microenvironment and 660 nm laser irradiation. This induced the generation of NO, mild temperature, and ROS, and a second dynamic therapy (ONOO − ), destroying the mitochondrial structure and inhibiting the mitochondrial function. The blockade of the mitochondrial function would hinder the cellular respiration and ATP supply, and also perturb the communication and cellular components between the mitochondria and lysosomes. Consequently, the BCS NPs exhibited better antitumor efficacy as well as excellent biosafety than the gas therapy (GT), mild photothermal therapy (mPTT), or photodynamic therapy (PDT) nanoagents individually. This novel cascaded GT/mPTT/PDT synergistic solution offering great potential for numerous anti-cancer treatments.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Yuxuan Feng,Shuhui Chen,Kaisheng Hua,Hui Li,Dong Jiang,Lujie Sheng,Dan Zhao,Jizhong Ren
Thermally rearranged(TR) polymers are usually prepared at an insert atmosphere and display high gas permeability, but their low gas selectivity results in high energy consumption. Thermal oxidation is an effective method to enhance the gas selectivity of microporous polymers. In this work, the effect of oxygen in the purge environment on imide-to-benzoxazole conversion and membrane structures was investigated. 1% oxygen content of the purge environment could restrain imide-to-benzoxazole conversion of 6FDA-DETDA/bisAPAF hydroxyl block polyimide(bHPI) membranes effectively, and oxygen induced the oxygen bridge formation, improving the gas selectivities of the resulting thermal-oxidative membranes with the increased oxygen content. Thermal-oxidative PBOCI membranes (TO-PBOCI) based on block poly(benzoxazole-co-imide)(PBOCI) precursor membranes were prepared to enhance gas separation performance of microporous polymers. The stable polybenzoxazole structures and microphase separation of polybenzoxazole blocks maintained membrane structures and the gas transport channels in the thermal-oxidative process at high temperature. Significantly, the remaining hydroxyl groups in PBOCI precursor membranes were beneficial for oxygen bridge formations of TO-PBOCI membranes, enhancing H 2 /CH 4 selectivity. As a result, the TO-PBOCI membranes treated at a high temperature kept high H 2 permeability and H 2 /CH 4 selectivity, surpassing the 2008 Robeson upper bound. The study about TO-PBOCI membranes promotes a better understanding of the polymeric materials and process development of microporous polymer membranes for hydrogen separation applications.
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 28
·15136-15145
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IF 14.511
Na Luo,Haijie Cai,Xiaojie Li,Mengmeng Guo,Chen Wang,Xiaohong Wang,Pengfei Hu,Zhixuan Cheng,Jiaqiang Xu
The construction of sensitive and durable sensitizers facilitates the development of metal oxide semiconductor (MOS)-based sensors with excellent gas sensing performance. Here, amorphous ruthenium oxide (RuOx) doped with lithium ions was successfully synthesized, and employed as a sensitizer to enhance the gas response of ZnO sensing materials. The gas sensing test results show that amorphous RuOx has better sensitization effects on ZnO than crystalline RuO2 at an optimum working temperature of 210 °C, such as a higher response, lower working temperature, better selectivity and faster response/recovery speed. The response of the RuOx/ZnO-1 sensor remains almost unchanged over a period of 60 days, while the RuOx sensitizer loaded on ZnO retains an amorphous structure after 60 days of working. Ex situ XPS also demonstrates that amorphous RuOx does not crystallize into polycrystalline RuO2 at 210 °C. The enhanced gas-sensing performance of the RuOx/ZnO-1 sensor can be attributed to the abundant active sites and better catalytic performance of amorphous RuOx, as well as enhanced electronic transmission between RuOx and ZnO. This is the first report showing that amorphous RuOx can work stably as a sensitizer at high temperature (210 °C), which facilitates the widespread use of amorphous metal catalysts in various fields.
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Journal of Materials Chemistry B
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2022
·Vol. 10
·期 27
·5263-5271
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IF 7.571
Peng Liu,Weifei Zhang,Jiapeng Deng,Yien Zheng,Jian Weng,Fei Yu,Deli Wang,Ming Zheng,Bin Kang,Hui Zeng
Sulfur dioxide (SO2) based gas therapy has received great attention recently. Nevertheless, it is still a challenge to fabricate a SO2 delivery system to achieve effective delivery and on-demand stimuli triggered release at tumor sites. Herein, a chain-shattering polymeric SO2 prodrug micelle system was fabricated for effective SO2 based gas therapy. First, an amphiphilic polymer (mPEG-P(HDI-DN)) was prepared by polycondensation of poly(ethylene glycol) methyl ether, hexamethylene diisocyanate and monomer containing SO2. mPEG-P(HDI-DN) can self-assemble into spherical micelles with a diameter of around 50–90 nm. Triggered release of SO2 from micelles can be achieved in the presence of GSH with the degradation of mPEG-P(HDI-DN) into small molecules. The in vitro experiment proved that mPEG-P(HDI-DN) micelles can enter into osteosarcoma cells and inhibit the growth of osteosarcoma cells by increasing the ROS level in cells. The in vivo experiments demonstrate that mPEG-P(HDI-DN) micelles can inhibit the growth of osteosarcoma effectively without obvious tissue toxicity. These results indicate that this chain-shattering polymeric SO2 prodrug micelle system is a promising candidate for effective SO2 based gas therapy.
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HIGH PERFORMANCE POLYMERS
·
2022
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IF 1.73
Hongge Jia,Shijun Zhao,Pengfei Jiang,Boyu Jing,Guoxing Yang,Shuangping Xu,Mingyu Zhang,Yanqing Qu,Yonglan Zou
A set of ionic liquid capped polyimide membranes was prepared using 1-aminoethyl-3-methylimidazolium hexafluorophosphate (IL1) and 1-aminopropylimidazolium bis(trifluoromethylsulfonyl)imine (IL2) as the terminal groups. The products’ molecular weights, mechanical properties, and separation permeability (CO2/CH4) were investigated. For CO2/CH4 separation, the selectivity of the ionic liquid capped polyimide membranes was higher than that of noncapped ones. Among them, the membrane synthesized by 4.4′- diaminodiphenyl ether and 4.4′-(hexafluoroisopropyl) diphthalic anhydride (6FDA) as monomer, with IL1 as terminal group, displayed the best selectivity. Its permeability was 7.47 Barrer and selectivity 102.42, which exceeded the 1991 Robeson curve. Polyimide membranes capped by ionic liquid showed high gas selectivity and good gas permeability as well as good physical and chemical properties. Consequently, it can be concluded that introducing an ionic liquid structure to polyimide chains could make attractive membrane materials for various gas separation and related applications.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-10
·
IF 17.694
Zhu Zhengxin,Liu Zaichun,Yin Yichen,Yuan Yuan,Meng Yahan,Jiang Taoli,Peng Qia,Wang Weiping,Chen Wei
Conventional electric double-layer capacitors are energy storage devices with a high specific power and extended cycle life. However, the low energy content of this class of devices acts as a stumbling block to widespread adoption in the energy storage field. To circumvent the low-energy drawback of electric double-layer capacitors, here we report the assembly and testing of a hybrid device called electrocatalytic hydrogen gas capacitor containing a hydrogen gas negative electrode and a carbon-based positive electrode. This device operates using pH-universal aqueous electrolyte solutions (i.e., from 0 to 14) in a wide temperature range (i.e., from − 70 °C to 60 °C). In particular, we report specific energy and power of 45 Wh kg −1 and 458 W kg −1 (both values based on the electrodes’ active materials mass), respectively, at 1 A g −1 and 25 °C with 9 M H 3 PO 4 electrolyte solution. The device also enables capacitance retention of 85% (final capacitance of about 114 F g −1 ) after 100,000 cycles at 10 A g −1 and 25 °C with 1 M phosphate buffer electrolyte solution.
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Journal of Materials Chemistry A
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2022
·Vol. 10
·期 25
·13355-13367
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IF 14.511
Bowen Wang,Ji Pan,Xiuyang Zou,Junliang Zhao,Guodong Xu,Zhiyu Jin,Zhe Sun,Feng Yan
The ionomer binder is crucial for the preparation of homogeneous catalyst layers for anion exchange membrane fuel cells (AEMFCs). However, the dense stacking of the ionomer on the catalyst surface results in large resistance to gas (especially O2) penetration in the three-phase boundary (TPB). Here, an in situ UV-driven gas “expressway” for the catalyst layer of AEMFCs was prepared by a rigid anthracene-based cross-linkable ionomer. The gas permeability of the catalyst layer was increased by 130% after crosslinking due to the high free volume between the ionomer chain segments. Meanwhile, the electrochemical and identical location transmission electron microscopy (IL-TEM) characterizations showed that the crosslinked ionomer binders played an anchoring role for the catalyst particles. The performance of an H2/O2 AEMFC (based on commercialized FAA-3-50 membranes) containing the crosslinked ionomer is much better than that of the uncrosslinked PPOAN ionomer. The in situ UV-driven crosslinking strategy of catalyst layers provides new insights into the preparation of homogeneous mesoscopic structures for the catalyst particles. More importantly, the rigid anthracene-based crosslinked structure constructs microscopic gas channels in the ionomer–catalyst interface, which has been overlooked in previous work.
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CELLULOSE
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2022
·Vol. 29
·期 15
·8293-8303
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IF 6.123
Yue Shuangshuang,Wang Shuanjin,Han Dongmei,Huang Sheng,Xiao Min,Meng Yuezhong
A transparent perhydropolysilazane-derived-SiO x coated cellulose film with high gas barrier properties was fabricated via a facile solution dip-coating followed by UV curing method. The conversion of perhydropolysilazane to SiO x was proved by ATR-FTIR, XPS and TOF–SIMS characterizations. AFM and SEM images revealed the smoothness of the coating and good adhesion between the cellulose substrate and the coating. The thickness of the SiO x coating (50–450 nm) can be tuned by changing the concentration of the perhydropolysilazane precursor solution. The cellulose film (35 µm in thickness) with 450 nm thick SiO x coating exhibits low oxygen transmission rate (OTR) value of 0.82 cm 3 /m 2 ·day and water vapor transmission rate (WVTR) value of 1.28 g/m 2 ·day. The excellent oxygen and water vapor barrier properties, ultrahigh transparency and complete biodegradability of the SiO x coated cellulose film endow it competitive potential for packaging applications. Graphical abstract A transparent perhydropolysilazane-derived-SiO x layer is tightly coated on a cellulose film via a facile solution dip-coating followed by UV curing method. The sandwich structured cellulose-SiO x films show excellent oxygen and water vapor barrier properties as well as ultrahigh transparency and complete biodegradability, which has a great potential for food, medicine and other packaging applications.
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NANOTECHNOLOGY
·
2022
·Vol. 33
·期 40
·405502
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IF 3.953
Ziqin Zhuang,Li Zhang,Chaozhu Huang,Xiaohang Wang,Haichuan Guo,Tiju Thomas,Fengdong Qu,Pei Wang,Minghui Yang
Surface modification by employing precious metals is one of the most effective ways to improve the gas-sensing performance of metal oxide semiconductors. Pure α-Fe2O3 nanoparticles and Pt-modified α-Fe2O3 nanoparticles were prepared sequentially using a rather simple hydrothermal synthesis and impregnation method. Compared with the original α-Fe2O3 nanomaterials, the Pt-α-Fe2O3 nanocomposite sensor shows a higher response value (Ra/Rg = 58.6) and a shorter response/recovery time (1 s/168 s) to 100 ppm dimethyl disulfide (DMDS) gas at 375 °C. In addition, it has better selectivity to DMDS gas with the value of more than 9 times higher than the other target gases at 375 °C. This study indicates that the Pt-α-Fe2O3 nanoparticle sensor has good prospects and can be used as a low-cost and effective DMDS gas sensor.
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ACS Materials Letters
·
2021
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IF 8.312
Rui Tang,Zhijie Zhu,Chaoran Li,Mengqi Xiao,Zhiyi Wu,Dake Zhang,Chengcheng Zhang,Yi Xiao,Mingyu Chu,Alexander Genest,Günther Rupprechter,Liang Zhang,Xiaohong Zhang,Le He
Cascade catalysis of reverse water gas shift (RWGS) and well-established CO hydrogenation holds promise for the conversion of greenhouse gas CO2 and renewable H2 into liquid hydrocarbons and methanol under mild conditions. However, it remains a big challenge to develop low-temperature RWGS catalysts with high activity, selectivity, and stability. Here, we report the design of an efficient RWGS catalyst by encapsulating ruthenium clusters with the size of 1 nm inside hollow silica shells. The spatially confined structure prevents the sintering of Ru clusters while the permeable silica layer allows the diffusion of gaseous reactants and products. This catalyst with reduced particle sizes not only inherits the excellent activity of Ru in CO2 hydrogenation reactions but also exhibits nearly 100% CO selectivity and superior stability at 200–500 °C. The ability to selectively produce CO from CO2 at relatively low temperatures paves the way for the production of value-added fuels from CO2 and renewable H2.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 33
·期 1
·280-289
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IF 3.665
Peng Kong,Jingqian Deng,Zhongjie Du,Wei Zou,Chen Zhang
A comb-like polymer containing crystallized alkyl side chains and the intermolecular hydrogen bonds between the linking groups was fabricated by grafting long-chain fatty amine onto poly(styrene-co-acrylic acid) n (P(S-AA) n , wherein “n” denoted AA feed ratio). The chemical structures and crystallization behaviors of the comb-like polymer P(S-AA) n -g(p) (wherein “p” denoted the number of side-chain carbon atoms) were analyzed by Fourier transform infrared, gel permeation chromatography, X-ray photoelectron spectroscopy, and X-ray diffractometer, differential scanning calorimetry, atomic force microscopy, respectively. It was found that the lamellar morphology could be generated by controlling the grafting density and side chain length of P(S-AA) n -g(p). Moreover, it was identified that the hydrogen bonds between amide groups could enhance the crystallinity and then adjust the interlamellar spacing of lamellar phase. As a result, P(S-AA) 70 -g(18) with the highest degree of crystallinity and closely packed lamellar morphology showed a good gas-barrier performance, and the nitrogen permeability reached 1.78 × 10 −14 cm 3 ·cm/cm 2 ·s·Pa. Furthermore, the permeation switch of the obtained comb-like polymer could reach 500 times traversing the melting point.
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Membranes
·
2021
·Vol. 12
·期 1
·34
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IF 4.106
Yushu Zhang,Hongge Jia,Qingji Wang,Wenqiang Ma,Guoxing Yang,Shuangping Xu,Shaobin Li,Guiming Su,Yanqing Qu,Mingyu Zhang,Pengfei Jiang
The preparation, characterization and gas separation properties of mixed matrix membranes (MMMs) were obtained from polyimide capped with ionic liquid and blended with metal-organic frameworks (MOFs). The synthesized MOF was amine functionalized to produce UiO-66-NH2, and its amino group has a higher affinity for CO2. Mixed matrix membranes exhibited good membrane forming ability, heat resistance and mechanical properties. The polyimide membrane exclusively capped by ionic liquid exhibited good permselectivity of 74.1 for CO2/CH4, which was 6.2 times that of the pure polyimide membrane. It is worth noting that MMM blended with UiO-66-NH2demonstrated the highest ideal selectivity for CO2/CH4(95.1) with a CO2permeability of 7.61 Barrer, which is close to the 2008 Robeson upper bound. The addition of UiO-66-NH2and ionic liquid enhanced the permselectivity of MMMs, which may be one of the promising technologies for high performance CO2/CH4gas separation.Keywords:mixed matrix membrane;metal-organic frameworks;polyimide;gas separation
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