Four kinds of cryptomelane-type octahedral molecular sieve(OMS)-2-X(the X represents the molar ratio of KMnO4/MnAc2) were prepared as catalytic materials for ozone decomposition through a one-step hydrothermal reactio...Four kinds of cryptomelane-type octahedral molecular sieve(OMS)-2-X(the X represents the molar ratio of KMnO4/MnAc2) were prepared as catalytic materials for ozone decomposition through a one-step hydrothermal reaction of KMnO4 and MnAc2, by changing their molar ratios. These samples were characterized by N2 adsorption–desorption, X-ray di raction(XRD), transmission electron microscopy(TEM), scanning electron microscopy(SEM), temperature programmed reduction by H2(H2-TPR) and X-ray photoelectron spectroscopy(XPS). Among them, the OMS-2-0.7 sample showed the best O3 conversion of 92% under high relative humidity(RH) of 90% and gas hourly space velocity of 585,000 h-1. This was accordingly thought as a possible way for purifying ozone-containing waste gases under high RH atmospheres. The e ciency of ozone decomposition of the prepared OMS-2-X sample was found to be related to specific surface area, particle size, surface oxygen vacancies, and Mn3+ cation amounts. The one-step hydrothermal synthesis was shown to be a simple method to prepare the considerably active OMS-2 solids for ozone decomposition.展开更多
Di(2-ethylhexyl)phthalate(DEHP),a complex structure with high toxicity,is a common organic pollutant.This study investigated the effects of fresh biochar(FBC),and freeze-thaw cycled aged biochar(FTC-BC)on DEHP-contami...Di(2-ethylhexyl)phthalate(DEHP),a complex structure with high toxicity,is a common organic pollutant.This study investigated the effects of fresh biochar(FBC),and freeze-thaw cycled aged biochar(FTC-BC)on DEHP-contaminated soils using a pot experiment.The specific surface area of FBC increased from 145.20 to 303.50 m~2/g,and oxygen-containing functional groups increased from 1.26 to 1.48 mol/g after freeze-thaw cycles,greatly enhancing the adsorption of DEHP by biochar in the soil.The comprehensive radar chart evaluation showed that FBC and FTC-BC reduced DEHP growth stress and improved the soil properties.Compared with FBC,FTC-BC performed better in protecting the normal growth of pakchoi and improving soil properties.In addition,the application of biochar increased the diversity and abundance of bacteria in the DEHP-contaminated soil and changed the composition of the soil bacterial community.The partial least squares path model(PLS-PM)showed that adding biochar as a soil remediation agent significantly positively impacted soil nutrients and indirectly reduced the DEHP levels in soil and plants by increasing soil microbial diversity.Compared with FBC,FTC-BC creates a more satisfactory living environment for microorganisms and has a better effect on the degradation of DEHP in the soil.This study provides a theoretical basis for future biochar remediation of DEHP-contaminated soils in cold high-latitude regions.展开更多
Aqueous rechargeable Zn//MnO_(2)batteries show promising prospects for grid-scale energy storage due to their intrinsic safety,abundant resource,and potential high performance.Unfortunately,the real capability of thes...Aqueous rechargeable Zn//MnO_(2)batteries show promising prospects for grid-scale energy storage due to their intrinsic safety,abundant resource,and potential high performance.Unfortunately,the real capability of these devices is far from satisfactory thanks to the low capacity and sluggish kinetics of the MnO_(2)cathode.Herein,we report a dual cation doping strategy by synthesis of MnO_(2)in the presence of Ti_(3)_(2)X MXenes and Ni^(2+)ions to essentially address these drawbacks.Such a process contributes to a Ti,Ni co-dopedα-MnO_(2)anchored on MXenes.The Ti^(3+)ions incorporated in the framework allow a partial multivalent variation for a large capacity while the Ni^(2+)ions promote the H^(+)transfer within the MnO_(2)matrix via the Grotthuss proton transport manner.As a result,the optimal dual cation doped MnO_(2)exhibits a large reversible capacity of 378 mAh·g-1 at 0.1 C and a high rate capability.Moreover,capacity retention as high as 92%is observed after cycling at 4 C for 1000 times,far superior to many of the previously reported results.This facile strategy demonstrated here may shed new insight into the rational design of electrodes based on high-performance Zn//MnO_(2)batteries.展开更多
OBJECTIVE: To study the use of Jianjining in the treatment of myasthenia gravis (MG) patients with a deficiency of both spleen and kidney via the theory on the combination of disease with syndrome. METHODS: Sixty MG p...OBJECTIVE: To study the use of Jianjining in the treatment of myasthenia gravis (MG) patients with a deficiency of both spleen and kidney via the theory on the combination of disease with syndrome. METHODS: Sixty MG patients with a deficiency of both spleen and kidney were randomly divided into an treatment group (n=30) treated with Jianjining granules and Western Medicine (prednisone or pyridostigmine bromide) and a control group (n= 30) treated with Jianjining granules. The dosage of the three drugs was reduced over the course of treatment. After 3 and 6 months of treatment, the curative effect was evaluated with the muscle weakness severity scale (MWSS). RESULTS: The MWSS score after treatment declined significantly in both groups. The score in the treatment group was much lower than that in thecontrol group (P<0.05). The total effective rate was 63.33% (19/30) in the treatment group and 36.67% (11/30) in the control group after 3 months of treatment, and 80.00% (24/30) and 50.00% (15/30), respectively, after 6 months of treatment. The obvious and total effective rates in the treatment group were much higher than those in the control group (P<0.05). After 6 months of treatment, there were no obvious differences (P>0.05) in the obvious and effective rates between the 2 groups. However, the total effective rate in the treatment group was much higher than that in the control group (P<0.01). CONCLUSION: Using the theory on the combination of disease with syndrome, we found that the curative effect of Jianjining and Western Medicine on MG patients with deficiency of both spleen and kidney is worth further exploration.展开更多
基金financial support from the National Natural Science Foundation of China (No. U1862102)the Fundamental Research Funds for the Central Universities (XK1802-1, JD1819)
文摘Four kinds of cryptomelane-type octahedral molecular sieve(OMS)-2-X(the X represents the molar ratio of KMnO4/MnAc2) were prepared as catalytic materials for ozone decomposition through a one-step hydrothermal reaction of KMnO4 and MnAc2, by changing their molar ratios. These samples were characterized by N2 adsorption–desorption, X-ray di raction(XRD), transmission electron microscopy(TEM), scanning electron microscopy(SEM), temperature programmed reduction by H2(H2-TPR) and X-ray photoelectron spectroscopy(XPS). Among them, the OMS-2-0.7 sample showed the best O3 conversion of 92% under high relative humidity(RH) of 90% and gas hourly space velocity of 585,000 h-1. This was accordingly thought as a possible way for purifying ozone-containing waste gases under high RH atmospheres. The e ciency of ozone decomposition of the prepared OMS-2-X sample was found to be related to specific surface area, particle size, surface oxygen vacancies, and Mn3+ cation amounts. The one-step hydrothermal synthesis was shown to be a simple method to prepare the considerably active OMS-2 solids for ozone decomposition.
基金supported by the Joint Funds of the National Natural Science Foundation of China (No.U21A20238)the Strategic Pilot Project of Science and Technology in CAS (No.XDA28010502)+1 种基金the major projects of research and development program of application technology of Heilongjiang Province of China (No.GA19B105)the Heilongjiang Provincial Key Laboratory of Soil Protection and Remediation。
文摘Di(2-ethylhexyl)phthalate(DEHP),a complex structure with high toxicity,is a common organic pollutant.This study investigated the effects of fresh biochar(FBC),and freeze-thaw cycled aged biochar(FTC-BC)on DEHP-contaminated soils using a pot experiment.The specific surface area of FBC increased from 145.20 to 303.50 m~2/g,and oxygen-containing functional groups increased from 1.26 to 1.48 mol/g after freeze-thaw cycles,greatly enhancing the adsorption of DEHP by biochar in the soil.The comprehensive radar chart evaluation showed that FBC and FTC-BC reduced DEHP growth stress and improved the soil properties.Compared with FBC,FTC-BC performed better in protecting the normal growth of pakchoi and improving soil properties.In addition,the application of biochar increased the diversity and abundance of bacteria in the DEHP-contaminated soil and changed the composition of the soil bacterial community.The partial least squares path model(PLS-PM)showed that adding biochar as a soil remediation agent significantly positively impacted soil nutrients and indirectly reduced the DEHP levels in soil and plants by increasing soil microbial diversity.Compared with FBC,FTC-BC creates a more satisfactory living environment for microorganisms and has a better effect on the degradation of DEHP in the soil.This study provides a theoretical basis for future biochar remediation of DEHP-contaminated soils in cold high-latitude regions.
基金This work was financially supported by the National Natural Science Foundation of China(Nos.21975258,22179145,22005341,and 21878336)the startup support grant from China University of Petroleum(East China)Shandong Provincial Natural Science Foundation(Nos.ZR2020ZD08 and ZR2018ZC1458).
文摘Aqueous rechargeable Zn//MnO_(2)batteries show promising prospects for grid-scale energy storage due to their intrinsic safety,abundant resource,and potential high performance.Unfortunately,the real capability of these devices is far from satisfactory thanks to the low capacity and sluggish kinetics of the MnO_(2)cathode.Herein,we report a dual cation doping strategy by synthesis of MnO_(2)in the presence of Ti_(3)_(2)X MXenes and Ni^(2+)ions to essentially address these drawbacks.Such a process contributes to a Ti,Ni co-dopedα-MnO_(2)anchored on MXenes.The Ti^(3+)ions incorporated in the framework allow a partial multivalent variation for a large capacity while the Ni^(2+)ions promote the H^(+)transfer within the MnO_(2)matrix via the Grotthuss proton transport manner.As a result,the optimal dual cation doped MnO_(2)exhibits a large reversible capacity of 378 mAh·g-1 at 0.1 C and a high rate capability.Moreover,capacity retention as high as 92%is observed after cycling at 4 C for 1000 times,far superior to many of the previously reported results.This facile strategy demonstrated here may shed new insight into the rational design of electrodes based on high-performance Zn//MnO_(2)batteries.
基金Supported by a Key Project in Basic Research of Shanghai Municipal Committee of Science(No.10JC1414500)a Planned Project in the TCM Fund of Scientific Research under the Shanghai Municipal Health Bureau (2010J002B)
文摘OBJECTIVE: To study the use of Jianjining in the treatment of myasthenia gravis (MG) patients with a deficiency of both spleen and kidney via the theory on the combination of disease with syndrome. METHODS: Sixty MG patients with a deficiency of both spleen and kidney were randomly divided into an treatment group (n=30) treated with Jianjining granules and Western Medicine (prednisone or pyridostigmine bromide) and a control group (n= 30) treated with Jianjining granules. The dosage of the three drugs was reduced over the course of treatment. After 3 and 6 months of treatment, the curative effect was evaluated with the muscle weakness severity scale (MWSS). RESULTS: The MWSS score after treatment declined significantly in both groups. The score in the treatment group was much lower than that in thecontrol group (P<0.05). The total effective rate was 63.33% (19/30) in the treatment group and 36.67% (11/30) in the control group after 3 months of treatment, and 80.00% (24/30) and 50.00% (15/30), respectively, after 6 months of treatment. The obvious and total effective rates in the treatment group were much higher than those in the control group (P<0.05). After 6 months of treatment, there were no obvious differences (P>0.05) in the obvious and effective rates between the 2 groups. However, the total effective rate in the treatment group was much higher than that in the control group (P<0.01). CONCLUSION: Using the theory on the combination of disease with syndrome, we found that the curative effect of Jianjining and Western Medicine on MG patients with deficiency of both spleen and kidney is worth further exploration.
