BIOMATERIALS
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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.
研究领域:
纳米技术
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癌症治疗
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光热疗法
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气体治疗
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药物递送系统
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产品关联
DOI
PubMed
高影响因子
Catalysts
·
2020
·Vol. 10
·期 11
·1329
·
IF 3.52
Shijie Hao,Yandi Cai,Chuanzhi Sun,Jingfang Sun,Changjin Tang,Lin Dong
Monolithic Mn-Fe-Ce-Al-O catalyst with honeycomb cordierite ceramic as a carrier was reported for the first time for low temperature deNOxapplication. In the reaction of selective catalytic reduction (SCR) of NO with NH3, a NO conversion of above 80% at 100 °C was obtained. Notably, the catalyst also showed excellent resistance against SO2and H2O. About 60% NO conversion was maintained after successive operation in the mixed stream of SO2and H2O for 168 h. The Brunner−Emmet−Teller (BET) measurement, SEM, EDS, thermogravimetric analysis (TG), FT-IR, and XPS results of the used catalysts indicated that certain amounts of ammonium sulfate was formed on the surface of the catalyst. XPS results revealed that partial of Fe2+was oxidized to Fe3+during the reaction process, and Fe2+species have strong redox ability, which can explain the decrease in activity after reaction. In addition, SO2and H2O induced a transformation of Ce from Ce4+to Ce3+on the surface of the catalyst, which increased the amount of chemisorbed oxygen. Owing to these factors, the addition of Ce and Fe species contributes to excellent resistance of the catalyst to SO2and H2O.Keywords:honeycomb catalyst;Mn-Fe-Ce-Al-O;low temperature denitration;water and sulfur resistance
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2018
·
IF 4.667
Shuohan Yu,Yiyang Lu,Yuan Cao,Jiaming Wang,Bowen Sun,Fei Gao,Changjin Tang,Lin Dong
Mn-based catalysts were believed to be promoting low temperature NH 3 -SCR catalysts for their satisfactory catalytic activity, whereas their poor SO 2 and H 2 O tolerance inhibited their applications. In this work, utilizing poor SO 2 tolerance of Mn oxides, composite catalytic systems containing Mn oxides as deSO x catalyst was designed and synthesized, which exhibited excellent low temperature NH 3 -SCR performance in the presence of SO 2 and H 2 O. The deSO x mechanism of Mn oxides was systematically investigated. In results, SO 2 was catalytic oxidized on the surface of Mn oxides. Oxidized sulfur species could flow away from Mn oxides surface through feed gas flow or form MnSO 4 . When NH 3 and H 2 O were introduced into the feed gas, the oxidized sulfur species were completely deposited as NH 4 HSO 4 instead of forming MnSO 4 . Thus, SO 2 was removed from feed gas entirely resulting in the superb low temperature NH 3 -SCR performances. This work provided a general strategy to enhance SO 2 and H 2 O tolerance of NH 3 -SCR catalysts at low temperature by removing SO 2 using NH 3 and H 2 O who existed in the exhaust gas from stationary sources.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
ENERGY & FUELS
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2020
·
IF 3.421
Hongyuan Xi,Song Zhou,Zhao Zhang
Nitric oxide and sulfur dioxide from the exhaust gases of marine diesel engines are harmful for the environment and human health. Environmentally friendly sodium persulfate, which satisfies the requirements of ships and navigation, was used as the main absorbent for the simultaneous removal of SO2 and NO in a self-designed bubble column reactor with an industrial gas distributor in this work. The focus of this work was the absorption of the insoluble NO. The influences of various parameters including the reaction temperature, Na2S2O8 concentration, NO concentration, pH value of the solution, and presence of coexisting gases on NO absorption were comprehensively and systematically studied according to the different working conditions of marine diesel engines. Furthermore, experiments for simultaneously removing SO2 and NO were conducted. Different from the previous studies, the new experimental results showed that the increase of NO concentration and the pH value of 12 were not conducive to the NO absorption; the highest removal efficiency of NO was at pH of 9; the existence of sulfur dioxide weakened the absorption of nitric oxide; the final products of the simultaneous absorption were sulfate and nitrate according to the product detection results. However, the SO2 and NO in simulated exhaust gases (900 ppm SO2, 1000 ppm NO, 15% O2 and 5% CO2) from marine diesel engines were completely absorbed under nonoptimal conditions (at 70 °C and in a 0.15 mol/L sodium persulfate solution), which indicated that sodium persulfate is promising for use in wet emission control technologies for marine diesel engines.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2015
·Vol. 39
·期 10
·8158-8164
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IF 3.086
Dongshun Deng,Guoqiang Han,Yaotai Jiang
Efficient and reversible absorption of SO2 in six new deep eutectic solvents (DESs) composed of levulinic acid (LA) and quaternary ammonium salts (choline chloride, CC; choline acetyl chloride, CAC; tetraethylammonium chloride, TEAC; tetraethylammonium bromide, TEAB; tetrabutylammonium chloride, TBAC; tetrabutylammonium bromide, TBAB) was systematically investigated. The molar ratio of LA to quaternary ammonium salt was fixed at 3 : 1. The results showed that all DESs possessed satisfactory performance for SO2 absorption, with the maximum absorption capacity of 0.625 g SO2 per g DES of LA–TEAC at 293.15 K under ambient pressure. The absorbed SO2 was easily released by bubbling N2 at 323.15 K and the regenerated DES was recycled five times without obvious loss of absorption performance. The solubility of SO2 in DES of LA–CC at T = 293.15, 303.15, 313.15, and 323.15 K under subatmospheric pressures was also determined. The relative thermodynamic parameters, i.e., absorption enthalpy, absorption entropy, and absorption Gibbs free energy, were further calculated, giving results with small negative values. The influence of water content on the SO2 absorption was also investigated. According to NMR and FTIR analyses, the absorption of SO2 in DES was a physical process. Moreover, all the DESs exhibited high selectivity for SO2/CO2. The present DESs are promising absorbents for SO2 because of their high absorption capacity and good reversibility.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2017
·
IF 3.648
Yucui Hou,Jiahe Yan,Lixia Feng,Fan Xie,Weize Wu
Rice straw is a renewable, cheap, and abundant resource in agriculture. Due to its controllable and recoverable properties, H 2 O-SO 2 system was studied as a reaction medium to hydrolyze rice straw to produce chemicals by a two-step treatment. The first-step treatment converted hemicellulose to xylose (17.1%), glucose (3.1%) and arabinose (3.5%) at 140 °C. The second-step treatment converted cellulose to glucose (10.9%) at 190 °C. The total yield of products by the two-step treatment of rice straw was 41.1%, which is more than that in the one-step treatment (21.0% at 190 °C). The apparent activation energies for hemicellulose conversion and xylose dehydration were 76.7 and 66.9 kJ/mol, respectively. The degradation products obtained from the two-step treatment are less than that from the one-step treatment.
研究领域:
生物化学
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可再生资源工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Zhonghui Zhang,Bolun Yang,Yue Wu,Wenxiang Zhang,Heping Ma
The efficient capture of SO 2 after the combustion of fossil fuels is of great challenge as the low SO 2 concentration (<500 ppm) and coexisting with CO 2 , water, O 2 in flue gas . Robust zirconium-based MOFs possessing accessible polar sites usually have high SO 2 adsorption capacity but poor durably in adsorption desulfurization due to the acidic sulfate deposition on the Zr-O cluster. Herein, a Zr-O cluster post-modification method was introduced in a Zr-MOF (MOF-808) to form EDTA-MOF-808 (EDTA, ethylene diaminetetraacetic acid) for selective and durable removal of SO 2 . The introduction of EDTA not only improve their SO 2 adsorption capacity, but also sharply increase their SO 2 /CO 2 selectivity (57.2 vs 8.9) and SO 2 /N 2 selectivity (1915.8 vs 292.7) at low SO 2 partial pressure. Moreover, the synergistic effects of dipole and hydrogen bonding interaction between SO 2 and EDTA in EDTA-MOF-808 make the capture of SO 2 in a reversible manner, which can prevent the formation of S(VI) species in Zr-MOF. DFT calculation confirmed that SO 2 was interacted with EDTA through moderate dipole–dipole interaction (S(SO 2 ) with N(EDTA)) and hydrogen bonds (H(–COOH) with O(SO 2 )). Systematic investigations including thermodynamic SO 2 adsorption, dynamic breakthrough experiments, stability tests and DFT-calculations in both MOF-808 and EDTA-MOF-808 confirmed the efficient performance of post modification of Zr-O clusters with EDTA in Zr-MOFs for durable SO 2 capture.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Foods
·
2023
·Vol. 12
·期 11
·2222
·
IF 5.2
Shihua Mai,Yue Ma,Hongsheng Liu,Chao Li,Yuqing Song,Kaizhen Hu,Xinyan Chen,Ying Chen,Wei Zou
To improve the fresh-keeping of highly perishable fruits with high commercial value, a novel starch-based foam packaging material was developed in this study. The foam incorporated the antiseptic ingredient Na2S2O5, which chemically interacted with environmental moisture to release SO2as an antifungal agent. Scanning electron microscopy (SEM), moisture absorption and mechanical measurements were used to characterize the unique sandwich-like inner structure of the foam which allowed for the modulable release of SO2. The starch-based foam exhibited sufficient resilience (~100%) to provide ideal cushioning to prevent physical damage to fresh fruits during transportation. When 25 g/m2of Na2S2O5was applied, the foam stably released over 100 ppm SO2and demonstrated satisfactory antifungal performance (inhibition over 60%) in terms of maintaining the appearance and nutritional values (such as soluble solids 14 vs. 11%, total acidity 0.45 vs. 0.30%, and Vitamin C 3.4 vs. 2.5 mg/100 g) of fresh grapes during a 21 day storage period. Additionally, the residual SO2(14 mg/kg) also meets the safety limits (<30 mg/kg). These research findings suggest great potential for the utilization of this novel foam in the food industry.Keywords:starch-based foam package;sandwich-like inner structure;cushioning;antisepsis;fresh-keeping
研究领域:
食品科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Kai Wang,Guangzhen Li,Yanhong Li,Yuan Chen,Ling Zhang,Zhiying Zhu,Zhiyong Xu,Wenbo Zhao
In the present work, a kind of amine alkyl siloxane N -butyl-N-((1,1,3-trimethyl-3,3-diphenyldisiloxaneyl)methyl)butan-1-amine (BTDMBA) was synthesized and used to capture SO 2 . Its thermal decomposition temperature is 160℃, which is comparable with that of Ionic liquids (ILs), but its viscosity is only 125 mPa∙s at 25℃ after the absorption of SO 2 , which is much lower than that of ILs. The reaction mechanism is that BTDMBA reacted with SO 2 to form charge transfer complex BTDMBA∙SO 2 . The reaction enthalpy and entropy change are −83.95 kJ/mol and −240.48 J·mol −1 ·K −1 , respectively, which are more negative than that of ILs. By comparing the enthalpy and entropy change of amine alkyl siloxane and absorbents reported in literatures, an unexpected entropy enthalpy compensation phenomenon was discovered and the isokinetic temperature was found to be 371 K. Based on this phenomenon and the optimization objective function, it was also found that with the decrease of entropy change, the optimal absorption and desorption temperature difference increased initially and decreased afterwards. The maximum of entropy changes is −201 J·mol −1 ·K −1 for absorbent to achieve recycle absorption capacity 0.79 mol/mol under the condition of absorption pressure 0.002 bar and desorption pressure 1 bar.
研究领域:
物理化学
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环境化学
·
分离科学
·
能源材料
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工业气体净化
·
绿色化工
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2023
·
IF 12.9
Xiaolong Liu,Yang Zou,Xue Li,Tieyao Xu,Wanglai Cen,Bin Li,Tingyu Zhu
Bimetallic catalysts Pt–M/Ti were prepared by introducing various dopants (M = Mn, Fe, Co, Cu, Ce, Mo) into Pt/Ti with ultralow loadings (0.5 wt % M) and compared in CO oxidation in the presence of H2O and SO2. Among these catalysts, Pt–0.5Mn/Ti contributed the highest oxidation efficiency and strongest sulfur resistance. Further improvement of Mn contents led to the decrease of CO conversion. It was indicated that the introduction of appropriate Mn species enhanced the active oxygen supplying ability of the catalyst, thus improving the reaction activity. The CO oxidation performance of the catalyst was improved through the reaction between *OH from H2O dissociation and CO. The deposition of S on the Pt–0.5Mn/Ti surface did not increase with time extension. Theoretical calculation results revealed that cleavage of S–O–Mn species could be facilitated by Pt, and the SO2 adsorption energy calculations demonstrated that SO2 was more easily adsorbed on Pt/Ti than Pt–0.5Mn/Ti, which was very consistent with its sulfur resistance. In situ DRIFT studies at 260 °C revealed that the introduction of SO2 onto Pt–0.5Mn/Ti showed little change for CO adsorption on different Pt species, while Pt/Ti showed an apparent decrease of Pt0–CO. 18O isotopic experiments in the presence of H218O and SO2 were systematically designed to accurately quantify the CO2 composition including C16O16O, C16O18O, and C18O18O. Accordingly, the reaction mechanism for Pt–0.5Mn/Ti catalyzed CO oxidation consisting of four pathways was proposed.
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·125232
·
IF 7.5
Xiankun Wu,Weijian Xiong,Wentao Zheng,Chenyang Xu,Qing Zhao,Xiaomin Zhang,Youting Wu
Novel sulfolane-based DESs with exceptionally low viscosity were developed. • The potential formation of DESs was disclosed via molecular dynamics simulations. • High SO₂ absorption capacity and satisfied SO₂/CO₂ selectivity was achieved. • Cooperative absorption mechanism revealed by DFT and molecular dynamics simulations. • Excellent reversibility over four consecutive absorption-desorption cycles. To address the limitations of conventional flue gas desulfurization technologies and the challenges of high viscosity and poor selectivity in many deep eutectic solvents (DESs), this work develops a series of novel low-viscosity sulfolane-based DESs for selective SO₂ capture. Four DESs were prepared by combining sulfolane (Sul) with four hydrogen bond donors (HBDs): imidazole (Im), caprolactam (CPL), 3-aminopyrazole (3-AP), and 4-methylimidazole (4-MI) at a 1:1 molar ratio. These DESs exhibit exceptionally low viscosities (below 20 mPa·s at 313.2 K) and fast gas–liquid mass transfer. Among them, Sul-Im demonstrates outstanding performance, achieving a high SO₂ absorption capacity of 9.38 mol/kg at 313.2 K and 1.0 atm, excellent SO₂/CO₂ selectivity of 24.5, and rapid absorption equilibrium within 400 s. Spectroscopic characterizations together with density functional theory calculations and molecular dynamics simulations reveal a cooperative absorption mechanism: the N site of imidazole acts as the dominant Lewis basic site for strong interaction with SO₂, while the O sites of sulfolane provide a polar solvation environment that further stabilizes SO₂ through Lewis acid–base and dipole–dipole interactions. Moreover, Sul-Im exhibits excellent reversibility over four consecutive absorption–desorption cycles with no significant capacity loss. These sulfolane-based DESs offer a compelling combination of low viscosity, high SO₂ capacity, fast kinetics, and good regenerability, positioning them as promising and sustainable solvents for selective SO₂ removal from CO₂-containing flue gas. Download: Download high-res image (155KB) Download: Download full-size image This work develops a series of novel sulfone-based deep eutectic solvents for the highly selective capture of SO 2 from CO 2 through experimental study and molecular simulation insights.
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yixi Wang,Wenqing Xu,Zhi Liu,Yulong Shan,Wanrong Chen,Xinyu Zhang,Tingyu Zhu
Controlling both CO and NOx pollutants without additional cost is necessary but challenging, especially in industrial flue gas with complex components. Previous studies mainly focused on the effect of O 2 and SO 2 on the CO oxidation side reaction and valence state of Ir species on various catalysts, while neglecting the impact on NO conversion pathway. Herein, we propose an "ineffective reaction pathway" in the presence of O 2 with nitrate as an intermediate according to the results of in situ DRIFTS and DFT. And we also reveal the contribution of SO 2 in inhibiting the adsorption of O 2 and promoting the selective adsorption of NO and CO even at lower injection concentrations, based on the oxidation of SO 2 on Ir(111). This is quite a favorable characteristic for the treatment of industrial flue gas, resolving the long–standing dispute on the involvement of these components in the CO–SCR reaction. Under specific conditions (CO/NO=20, O 2 =5%, SO 2 =200 ppm) at 250 °C, the NOx conversion is as high as 78%. These results will contribute to the development of more efficient catalysts in the future for simultaneously controlling two pollutants (CO and NOx).
研究领域:
环境科学
·
催化化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）