The adsorption behavior ofp-aminobenzoic acid and o-aminobenzoic acid onto the different polymeric adsorbents was systematically investigated as a function of the solution concentration and temperature. Experimental r...The adsorption behavior ofp-aminobenzoic acid and o-aminobenzoic acid onto the different polymeric adsorbents was systematically investigated as a function of the solution concentration and temperature. Experimental results indicated that the equilibrium adsorption data of the four polymeric adsorbents fitted well in the Freundlich isotherm. The adsorption capacity of multi-functional polymeric adsorbent NJ-99 was the highest, which might be attributed to the strong hydrogen-bonding interaction between the amino groups on the resin and the carboxyl group of aminobenzoic acid. The adsorption capacity of o-aminobenzoic acid onto any adsorbent was higher than p-aminobenzoic acid. Thermodynamic studies suggested the exothermic, spontaneous physical adsorption process. Adsorption kinetics results showed that the adsorption followed the pseudo-second-order kinetics model and the intraparticle mass transfer process was the rate-controlling step.展开更多
[Objective]We aimed to study the preparation methods of impurely irrigated soil adsorbent from beaches,as well as its ability to absorb phenol.[Method]Using hydrochloric acid as activator,we compared the influences of...[Objective]We aimed to study the preparation methods of impurely irrigated soil adsorbent from beaches,as well as its ability to absorb phenol.[Method]Using hydrochloric acid as activator,we compared the influences of various soil adsorbents on the adsorption of phenol through the desired orthogonal tests where the usage of saw dust,concentration of hydrochloric acid,liquid-solid ratio and carbonization temperature varied.Afterwards,we characterized this soil adsorbent.[Result]The optimal conditions for preparing the soil adsorbent were as follows,that is,the usage of saw dust was 20%,concentration of HCl was 1 mol /L,the ratio of liquid to solid was 2:1,carbonization temperature was 500 ℃,and activation time was one hour,the absorption efficiency of phenol in water by the soil adsorbent reached above 90%.Characterization showed that the prepared soil adsorbent changed obviously in the structure,that is,soil pores and carbon content increased greatly,as well as its absorption efficiency.[Conclusion]The prepared soil adsorbent by this method greatly improved the absorption efficiency of phenol in water,which provided a novel method for the reasonable utilization of saw dust,with good prospects.展开更多
Spin defects in silicon carbide(SiC)have attracted much attentions in various quantum technologies.In this work,we study the optical manipulation of charge state and coherent control of multifold divacancy spins ensem...Spin defects in silicon carbide(SiC)have attracted much attentions in various quantum technologies.In this work,we study the optical manipulation of charge state and coherent control of multifold divacancy spins ensemble in SiC under resonant excitation.The results reveal that the resonantly excited divacancy ensemble counts have dozens of enhancements by repumping a higher-energy laser.Moreover,it has a similar optimal repump laser wavelength of around 670 nm for multiple divacancies.On the basis of this,the optically detected magnetic resonance(ODMR)experiment shows that repump lasers with different wavelengths do not affect the ODMR contrast and line width.In addition,the repump lasers also do not change the divacancy spins'coherence times.The experiments pave the way for using the optimal repump excitation method for SiC-based quantum information processing and quantum sensing.展开更多
The title compound, C16H20INo3, crystallizes in space group P1 (#2),triclinic, a=7. 970(1), b=9. 098(1), c= 12. 910(2) A, a=90. 00(1), β=81. 63(1), γ=65. 75(1)°, V=842. 6(2) A 3, Z=2, Dc= 1. 581 g/cm3,μ(MoKa) ...The title compound, C16H20INo3, crystallizes in space group P1 (#2),triclinic, a=7. 970(1), b=9. 098(1), c= 12. 910(2) A, a=90. 00(1), β=81. 63(1), γ=65. 75(1)°, V=842. 6(2) A 3, Z=2, Dc= 1. 581 g/cm3,μ(MoKa) = 1. 909mm-1, F(000) =400. The final R and (F2)R are 0. 0269 and0. 0632 for 2903 observed reflections (I>2σ(I) ), respectively. In the title molecule, two configurations,A and B were found for the slightly twisted cations, which take the same occupancy inthe crystal equally. Cations are connected through anions 1- and crystallized water,and anti-parallelly packed through intermolecular weak hydrogen bonding, van derWaals interactions and strong π-π interaction.展开更多
基金Project supported by the National Key Technology Research and Development Program of China(No.2006BAC02A15)Opening Foundation of Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection of China(No.JLCBE05006)the Qinglan Project of Jiangsu Province
文摘The adsorption behavior ofp-aminobenzoic acid and o-aminobenzoic acid onto the different polymeric adsorbents was systematically investigated as a function of the solution concentration and temperature. Experimental results indicated that the equilibrium adsorption data of the four polymeric adsorbents fitted well in the Freundlich isotherm. The adsorption capacity of multi-functional polymeric adsorbent NJ-99 was the highest, which might be attributed to the strong hydrogen-bonding interaction between the amino groups on the resin and the carboxyl group of aminobenzoic acid. The adsorption capacity of o-aminobenzoic acid onto any adsorbent was higher than p-aminobenzoic acid. Thermodynamic studies suggested the exothermic, spontaneous physical adsorption process. Adsorption kinetics results showed that the adsorption followed the pseudo-second-order kinetics model and the intraparticle mass transfer process was the rate-controlling step.
基金Supported by Open Foundation of Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection (JL-CBE09004)
文摘[Objective]We aimed to study the preparation methods of impurely irrigated soil adsorbent from beaches,as well as its ability to absorb phenol.[Method]Using hydrochloric acid as activator,we compared the influences of various soil adsorbents on the adsorption of phenol through the desired orthogonal tests where the usage of saw dust,concentration of hydrochloric acid,liquid-solid ratio and carbonization temperature varied.Afterwards,we characterized this soil adsorbent.[Result]The optimal conditions for preparing the soil adsorbent were as follows,that is,the usage of saw dust was 20%,concentration of HCl was 1 mol /L,the ratio of liquid to solid was 2:1,carbonization temperature was 500 ℃,and activation time was one hour,the absorption efficiency of phenol in water by the soil adsorbent reached above 90%.Characterization showed that the prepared soil adsorbent changed obviously in the structure,that is,soil pores and carbon content increased greatly,as well as its absorption efficiency.[Conclusion]The prepared soil adsorbent by this method greatly improved the absorption efficiency of phenol in water,which provided a novel method for the reasonable utilization of saw dust,with good prospects.
基金Fundamental Research Funds for the Central Universities(WK2030380017,WK2470000026)Anhui Initiative in Quantum Information Technologies(AHY020100,AHY060300)+3 种基金Science Foundation of the CAS(ZDRW-XH-2019-1)Key Research Program of Frontier Sciences,Chinese Academy of Sciences(CAS)(QYZDY-SSW-SLH003)National Natural Science Foundation of China(11774335,11804330,11821404,11975221,61725504,61905233,U19A2075)National Key Research and Development Program of China(2016YFA0302700,2017YFA0304100)。
文摘Spin defects in silicon carbide(SiC)have attracted much attentions in various quantum technologies.In this work,we study the optical manipulation of charge state and coherent control of multifold divacancy spins ensemble in SiC under resonant excitation.The results reveal that the resonantly excited divacancy ensemble counts have dozens of enhancements by repumping a higher-energy laser.Moreover,it has a similar optimal repump laser wavelength of around 670 nm for multiple divacancies.On the basis of this,the optically detected magnetic resonance(ODMR)experiment shows that repump lasers with different wavelengths do not affect the ODMR contrast and line width.In addition,the repump lasers also do not change the divacancy spins'coherence times.The experiments pave the way for using the optimal repump excitation method for SiC-based quantum information processing and quantum sensing.
文摘The title compound, C16H20INo3, crystallizes in space group P1 (#2),triclinic, a=7. 970(1), b=9. 098(1), c= 12. 910(2) A, a=90. 00(1), β=81. 63(1), γ=65. 75(1)°, V=842. 6(2) A 3, Z=2, Dc= 1. 581 g/cm3,μ(MoKa) = 1. 909mm-1, F(000) =400. The final R and (F2)R are 0. 0269 and0. 0632 for 2903 observed reflections (I>2σ(I) ), respectively. In the title molecule, two configurations,A and B were found for the slightly twisted cations, which take the same occupancy inthe crystal equally. Cations are connected through anions 1- and crystallized water,and anti-parallelly packed through intermolecular weak hydrogen bonding, van derWaals interactions and strong π-π interaction.
