SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Bing Yang,Yue Song,Yang Song,Ziyu Ma,Jianbo Sun
2D transition metal selenides are facing challenges in the field of gas sensing due to their short carrier lifetime and low utilization rate. Along these lines, in this work, MoSe 2 nanosheets were successfully synthesized by solvothermal method , and modified with TiO 2 QDs. P-N heterostructures with the advantage of quantum dot constraint effect are constructed. The developed heterojunction can effectively promote the separation and transfer of the generated charges, under the excitation of ultraviolet light , while the room temperature sensitivity of the material for the detection of NO 2 is enhanced.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yuling Ma,Airong Li,Cheng Wang
Metal-organic frameworks (MOFs) with a high specific surface area, an adjustable pore structure, and functionalized pore environment have a broad application prospect in gas adsorption and separation. In this work, a series of defective UiO-66 (UiO-66-monocarboxylic acid) samples were prepared by adding different monocarboxylic acids during the synthesis of UiO-66. UiO-66-monocarboxylic acid samples (UiO-66-formic acid, UiO-66-acetic acid, UiO-66-benzoic acid, UiO-66-acrylic acid, and UiO-66-cyanoacetic acid) had a high specific surface area (1200–1400 m 2 /g) and a good thermal stability (560 °C). In the desulfurization experiment of simulated flue gas (SO 2 /CO 2 /O 2 /N 2 , 0.3/10.0/5.5/84.2 vol%), the breakthrough time of UiO-66-cyanoacetic acid for SO 2 was higher (194 min/g), and the selectivity of SO 2 /CO 2 reached 33.8. Through optimizing the moles of cyanoacetic acid added, the breakthrough time of SO 2 on 18-UiO-66-cyanoacetic acid increased to 251 min/g. At a pressure of 1.0 bar and a temperature of 298 K, the adsorption capacity of SO 2 by 18-UiO-66-cyanoacetic acid reached 762.1 mg/g. In addition, the adsorption behavior of 18-UiO-66-cyanoacetic acid for SO 2 was considered as a combination of chemical and physical adsorption, and fractional chemisorption sites was provided by cyanoacetic acid.
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高影响因子
JOURNAL OF CONTROLLED RELEASE
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2022
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IF 11.467
Baizhu Chen,Xiaoge Zhang,Lili Cheng,Xiaomei Chen,Junjie Tang,Peng Zhang,Chen Wang,Jie Liu
The use of bacteria as living vehicles has attracted increasing attentions in tumor therapy field. The combination of functional materials with bacteria dramatically facilitates the antitumor effect. Here, we presented a rationally designed living system formed by programmed Escherichia Coli MG1655 cells (Ec) and black phosphorus (BP) nanoparticles (NPs). The bacteria were genetically engineered to express tumor necrosis factor-related apoptosis-inducing ligand (TRAIL), via an outer membrane YiaT protein (Ec-T). The Ec-T cells were associated with BP NPs on their surface to acquire [email protected] The designed living system could transfer the photoelectrons produced by BP NPs after laser irradiation and triggered the reductive metabolism of nitrate to nitric oxide for the in situ release at tumor sites, facilitating the therapeutic efficacy and the polarization of tumor associated macrophages to M1 phenotype. Meanwhile, the generation of reactive oxygen species induced the immunogenic cell death to further improve the antitumor efficacy. Additionally, the living system enhanced the immunological effect by promoting the apoptosis of tumor cells, activating the effect of T lymphocytes and releasing the pro-inflammatory cytokines. The integration of BP NPs, MG1655 cells and TRAIL led to an effective tumor therapy. Our work established an approach for the multifunctional antitumor living therapy.
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PubMed
高影响因子
FUEL
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2022
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IF 8.035
Yimao Shen,Zhi Li,Jingtao Hu,Yue Zhang,Tianduo Li,Guangjin Chen
Gas hydrate technology is a new gas storage method developed in recent years and has great application potential. Due to the slow formation kinetics of hydrate and the low actual gas storage density, it is a promising method to prepare the fixed bed filled with wet porous materials to inducing adsorption-hydration coupling effect, so as to improve the gas storage efficiency. In this study, various additives including THF, TBAB and diesel oil were added to the water-bearing activated carbon fixed bed to improve its gas storage capacity. Our experimental results show that the addition of THF or TBAB can significantly promote the gas storage performance of the bed. At the optimum concentration of THF (7.5 wt%), the gas storage density of bed (S b ) and gas storage capacity of hydrate (S w ) were 128.66 V/V b and 194.26 V/V w , which are 2.89 times and 3.07 times higher than those of wet activated carbon fixed bed without additives, respectively. When 5 wt% TBAB was added, the S b and S w were increased by 1.86 times and 1.87 times, respectively. Moreover, using diesel to establish gas channels in the fixed bed to improve the gas mass transfer between the bulk gas phase and the fixed bed can also significantly improve the gas storage performance of the bed. When the oil-carbon ratio (R o ) is 0.5, the S b and S w are 97.97 V/V b and 172.77 V/V w , respectively. However, further increasing the amount of diesel oil will not significantly improve the gas storage density of the bed due to the volume increase of the bed caused by the addition of diesel. When both diesel oil and THF are added to the water-containing fixed bed, the effect will be not significantly better than that of the bed with diesel oil or THF alone because the two accelerators compete with each other. Finally, the gas release and decomposition speed of the water-bearing fixed bed with / without 7.5 wt%THF are investigated. The results show that the final gas recovery of the bed with 7.5 wt% THF could reach 95.01 %, indicating a good application prospect.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Junyu Li,Lin zhu,Chenhui Yan,Zhiwei Mou,Zhenghan Wang,Shiyi Wei,Yangfan Su,Yuxuan Chen,Zhengguo Chen,Xiaoan Li,Tao Duan,Jiehong Lei
Because of their non-toxicity and low cost, bismuth-based materials have received considerable attention for the capture of gaseous iodine, especially for the removal of radioactive iodine in nuclear post-processing plants. In the actual operation conditions of reprocessing plant, the presence of water vapor must be considered as an important factor because it will significantly affect the iodine capturing efficiency for most iodine-capturing materials. To address this problem, we successfully synthesized a hydrophobic bismuth-based chrysotile membrane, which was modified by the silane coupling agent KH570. The chrysotile fiber was chosen to provide rich reactive sites for bismuth loading, and the bismuth was chosen due to its high affinity to iodine. The hydrophobic surface endowed by KH570 acts as a ‘protecting layer’ when water vapor exists during iodine adsorption. The maximum of iodine capture efficiency of the prepared membrane reached 483.37 mg/g in air, and 443.04 mg/g under 75 % relative humidity. Comparing hydrophobic membrane with one that non-modified by KH570, the hydrophobic membrane increases about 54 % iodine adsorption capacity in humid condition. This study provides a certain reference value for the application of bismuth-based materials in iodine removal under humid conditions.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yongpeng Ma,Jiandong Wang,Wentao Gu,Xiaojing Zhang,Haomiao Xu,Wenjun Huang,Yonghui Guo,Shaobo Wang
Herein, MoS 2 was used in a MoS 2 /H 2 O heterogeneous system for the heterogeneously catalyzed removal of Hg 0 from flue gas. Hg 0 removal efficiency reached 77.6% at 25 °C when the dosage of MoS 2 was 0.200 g/L in aqueous suspension. The observed effects of MoS 2 dosage and inlet Hg 0 concentration on Hg 0 removal efficiency revealed that the gas–liquid mass transfer process is the limiting step of Hg 0 removal. Low pH and low temperature were conducive to Hg 0 removal. SO 2 in the flue gas was absorbed by MoS 2 , and the simultaneous decrease in solution pH resulted in a slight increase in Hg 0 removal efficiency. The presence of NO in the flue gas enhanced Hg 0 removal efficiency. Common anions, such as NO 3 − , SO 4 2− , and CO 3 2− , have no obvious effect on Hg 0 removal. However, Cl − improved Hg 0 removal efficiency by 11% because of the production of HgCl n 2−n . The kinetics and mechanism of Hg 0 removal were studied, and the results indicated that Mo acted as a bridge and catalyst for Hg 0 oxidation, while S immobilized Hg 2+ by formation of HgS on MoS 2 .
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Shan-Jiang Wang,Xiao-Yang Zhang,Dan Su,Xi Yan,Huan-Li Zhou,Xiao-Mei Xue,Yun-Fan Wang,Tong Zhang
Photocatalytic water pollution remediation is currently a hot issue in the field of environmental protection. However, the limited optical adsorption, recombination of electrons and holes, as well as low kinetics in solid-liquid conditions impede the further improvement in photoactivity. Inspired by the degradation mechanism of photocatalytic process, started with interfacial engineering , in this paper, plasmonic metal-semiconductor heterostructures (PMSHs) combined with an optimized dissolved oxygen transporting channel were prepared. With the synergetic help of PMSHs and superhydrophilic-superhydrophobic (superwetting) reaction interface, it is not only can realize the effective capture of photons in the visible light band, but also promote the fully separation of electron-hole pairs. The efficiency in PMSHs based triphase system is ~60 times higher than traditional solid-liquid system, and is ~3 times higher than PMSHs based solid-liquid system. The stability and wide applicability in series organic dyes degradation also made it a good potential for practical pollutants water treatment.
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高影响因子
MACROMOLECULES
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2022
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IF 6.057
Wenxiang Zhang,Yue Wu,Yinhui Li,Shuhui Chen,Yu Fu,Zhonghui Zhang,Tong Yan,Shanshan Wang,Heping Ma
Efficiently capturing and recycling perfluorinated electron specialty gases (F-gases) with severe greenhouse effects (e.g., long atmospheric lifetime and high global warming potential) from etching exhaust is of great significance to the semiconductor industry. The adsorption separation technique based on a porous adsorbent is considered as an economical and effective method to remove the F-gases in the semiconductor exhaust, benefiting from its low energy consumption and high operational feasibility. Herein, two fluorinated microporous polymers (termed POPTrB-4F and POPTrB-8F) have been synthesized via direct C–H arylation polycondensation. Motivated by their fluorinated pore structure and sturdy covalent bond linkage mode, the separation performances of POPTrB-4F/8F for F-gases under both equilibrium and kinetic conditions were systematically studied. Both experimental results and theoretical calculations show that these two fluorinated polymers can selectively capture F-gases from the simulated etching exhaust. Impressively, the ideal adsorbed solution theory selectivity of POPTrB-4F and POPTrB-8F to SF6 reached 62.88 and 51.55, respectively, at 298.15 K and 1 bar. Moreover, the mechanisms of gas adsorption and separation in porous organic polymers have also been profoundly revealed through simulation calculations based on the density functional theory. These results suggest the possibility of exploiting these fluorinated microporous polymers for the separation of F-gases in an eco-friendly way.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Huang Liu,Huashi Li,Desong Yao,Ping Guo,Lianhui Wen
Due to the weak cementation of natural gas hydrate (NGH) reservoir in the seabed, during both the drilling and development processes, a multiphase (gas hydrate-sediments-seawater-natural gas mixture) flow is more likely to exist in the NGH reservoir and development wells, understand the natural gas hydrate particle dissociation kinetic in the hydrate-sediments/seawater slurries is important. In this work, first, a new NGH phase behavior research experimental apparatus contains a strong magnetic stirrer was built. By using this, we for the first time proposed to form NGH reservoir in the water saturated sands under stirring in the laboratory, which showed a much higher hydrate formation rate and water to hydrate conversation ratio than the usual static formation method. After that, the CH 4 hydrate-sands/seawater slurries were produced, the influence of pressures, temperatures, the size of sands, and stirring rates on CH 4 hydrate dissociation kinetic in the slurry were investigated. The dissociation rate of CH 4 hydrate-sands mixed particles markedly increased with decreasing operation pressure from 3 MPa to 0.1 MPa. The average dissociate rate reached 1762.57 mL/min at 0.1 MPa. It is interesting that unlike to the single NGH reservoir, no hydrate secondary formation and ice formation phenomenon arose in the hydrate-sands/seawater slurries during the CH 4 hydrate dissociation process. The increase of temperature and stirring rate substantially stimulated the dissociation of CH 4 hydrate particles in the slurry, while the sands’ size showed little effect. In addition, a high precision kinetic model for describing the dissociation of CH 4 hydrate in hydrate-sands/seawater slurries was built, in which the influence of pressure, temperature and stirring rate on the hydrate apparent dissociation rate constant was considered at the same time.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
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IF 4.326
Zan Chen,Zongping Hong,Hong Wu,Cheng Li,Zhongyi Jiang
Hybrid membranes based on the Tröger’s base polyimide (PI-TB) as a rigid microporous polymer matrix containing a kinked N-heterocycle and a kind of CO2-philic porous UiO-66-NH2 nano-filler were successfully fabricated for gas separation. This new hybrid membrane exhibits good interfacial compatibility through hydrogen bonds and charge transfer interactions between the PI-TB matrix and the UiO-66-NH2 nano-filler, thus enabling a relatively high loading and well dispersion of nano-filler. Meanwhile, the as-synthesized UiO-66-NH2 nanoparticles increase the average inter-chain spacing distance of PI-TB by interfering with the packing of polymer chains and thus providing additional transport pathways in the membranes. The pure gas permeabilities and ideal selectivities for CO2/CH4, CO2/N2, and O2/N2 systems were investigated at 35 °C and a feed pressure of 1 bar. Among them, the hybrid membrane containing 30 wt % UiO-66-NH2 exhibits the optimal gas separation performance with enhanced permeabilities of CO2 and O2 increased by ∼166% (415 and 92.3 Barrer, respectively) while maintaining comparable CO2/CH4, CO2/N2, and O2/N2 gas pair selectivities (25.0, 18.9, and 4.2, respectively) with the pristine PI-TB membrane. This work enriched the studies on the post-modification of PI-TB as a potential candidate membrane material for gas separation.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Xiaoning Meng,Mingshu Bi,Qiuping Xiao,Wei Gao
With the emergence of hydrogen economy worldwide and the increase of safety problems caused by the highly flammable and explosive characteristics of hydrogen (H 2 ), it is urgent to develop the portable sensors that can sensitively and quickly detect H 2 leaks. In this work, the H 2 sensing characteristics of Pd/SnS 2 /SnO 2 nanocomposites synthesized via hydrothermal route as well as impregnation route were systematically investigated for the first time. The influence of different SnS 2 and Pd loading on the H 2 sensing performances of SnO 2 nanoparticles was revealed by varying the addition levels of thiourea and palladium chloride. The H 2 sensing experimental results demonstrated that SnS 2 and Pd modification can greatly enhance the sensing capabilities of SnO 2 , where 1.0 at% Pd/SnS 2 /SnO 2 sensor exhibited high response (95) and rapid response/recovery time (1/9 s) to 500 ppm H 2 at 300 ℃, thus outperforming the current reported sensing performances of SnO 2 -based H 2 sensors. The superior sensing characteristics of Pd/SnS 2 /SnO 2 were attributed to the simultaneous synergistic effect of the three components. This study will supply a rational strategy for designing high sensitive and rapid response H 2 sensors.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Lulu Guo,Zhen Shen,Chunhui Ma,Chunqiang Ma,Jiaqi Wang,Tingxun Yuan
The development of high response, low detection limit and low-cost acetone sensors remains a great challenge so far. In this work, the high-performance acetone sensors based on Au nanoparticles (NPs)-loaded SnO 2 porous nanosheets were successfully synthesized via metal-organic frameworks (MOFs) template method, which synthesis method is facile and meets the requirements of large-scale production. The acetone sensing characteristics of pristine SnO 2 and Au-SnO 2 -based sensors are investigated. The optimized Au-SnO 2 -based sensor exhibits high response to acetone (R a /R g = 18.2 @100 ppm at 240 °C) with high selectivity and fast response/recovery time compared with that of pristine SnO 2 . Importantly, a fully reversible resistance signal with a low acetone concentration (1 ppm) can be detected, and the theoretical detection limit of the sensor is as low as 40 ppb. Finally, the enhanced acetone sensing performance of the Au-SnO 2 sensor can be attributed to the increased specific surface area and chemically adsorbed oxygen, as well as the formation of Schottky junction between the Au and SnO 2 interfaces.
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高影响因子
危险品化学品经营许可证（带存储）