SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Xian Qin,Hui Liu,Jinjia Wei
The reversible reaction of calcium oxide (CaO) carbonation/calcination is a viable energy storage technology that can be used in concentrated solar power plants. However, the use of pure CaO material is limited by the low Tammann temperature of CaCO 3 , which leads to incomplete reaction in the carbonation/calcination cycle process and particle agglomeration and sintering after multiple cycles. These factors affect CO 2 mass transfer and react with deep CaO, resulting in decreased energy storage performance with the increase of number of cycles, which seriously hinders the practical application of the material. In this study, MnCl 2 was employed as a stabilizer to overcome the poor cyclic stability of CaO by using a simple wet impregnation method. Mn 2+ was introduced into the CaO precursor through impregnation and calcination processes, resulting in the formation of Ca 2 MnO 4 . This compound acted as a skeleton to support the CaO structure. Additionally, some of the Cl − reacted with Ca 2+ to produce CaCl 2 , which melted during carbonation and facilitated CO 2 mass transfer. It is worth noting that when the concentration of MnCl 2 is 0.05M, the loaded samples exhibit a high energy storage density of 1710 kJ/kg. Moreover, after 50 cycles of carbonation/calcination, the performance only decreases by 5 %, which is 3.7 times that of the CaO materials of the same period. The proposed CA-MnCl 2 -0.05 material could be applied in concentrated solar power plants for energy storage.
研究领域:
材料科学
·
可再生能源
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 7
·1246
·
IF 3.4
Wenjuan Qi,Desheng Ding,Weijie Luo,Weiliang Jin,Qian Kou,Chuntao Ge,Saijun Xiao
The hardness and wear resistance of amorphous Al–Mn alloy coatings can be improved by incorporating ceramic particles into them to extend their application. In this paper, Al–Mn/WC composite coatings have been prepared with electrodeposition in stirred AlCl3–NaCl–KCl–MnCl2molten salts at 180 °C with the addition of WC particles. The effects of stirring speed (400–700 rpm) and cathode current density (15–75 mA/cm2) on the produced Al–Mn/WC composite coatings have been studied. At 600 rpm and 700 rpm, the Al–Mn/WC composite coatings exhibited the best uniform distribution of the embedded WC particles, with the tested microhardness value up to 650 HV0.1, compared with 530 HV0.1of the Al–Mn alloy. Moreover, under various cathode current densities, the best quality of the Al–Mn/WC composite coating was obtained at 55 mA/cm2, with a homogeneous distribution of WC particles and the highest microhardness value (670 HV0.1). It is expected that this method could be extended to be applied for the preparation of aluminum-based and magnesium-based ceramic composite coatings.Keywords:AlCl3–NaCl–KCl–MnCl2molten salts;electrodeposition;WC particles;Al–Mn/WC composite coating
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
·
2016
·Vol. 23
·期 1
·13-18
·
IF 1.87
Wang Weiwei,Ren Xingbi,Yu Mingming,Xia Lidong,Liu Ning,Peng Shuming
By a solution impregnation method, three modified stationary phases were prepared by contacting activated alumina with MnCl 2 at different MnCl 2 :Al 2 O 3 molar ratios = 1:10, 1:5, 1:2.5, respectively. N 2 sorption isotherms at 78 K were examined for the unmodified and modified samples, from which pore size distributions (PSD) of textural properties were derived with density function theory. Elution chromatographic tests of hydrogen isotopes were carried out at 78 K. The results indicated that both the microporous specific surface area (SSA) and the mesoporous SSA decline after modification, while the microporous SSA remains nearly unvaried among the modified ones. The chromatographic retention times as well as the bandwidths decline as the Mn content rises. The resolution of chromatographic peaks increases after modification, it remains unvaried and then decreases as the Mn content increases. The PSD of alumina SSA changed by the modification significantly influences the hydrogen isotopic elution chromatography.
研究领域:
材料科学
·
核化学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Nanomedicine
·
2021
·
IF 6.4
Xinghan Liu,Yujun Xu,Lijie Yin,Yayi Hou,Shuli Zhao
Purpose Since immune cells in the tumor microenvironment (TME) can affect the development and progression of tumors, strategies modulating immune cells are considered to have an important therapeutic effect. As a TLR7/8 agonist, R848 effectively activates the innate immune cells to exert an anti-tumor effect. Mn 2+ has been reported to strongly promote the maturation of antigen-presenting cells (APCs), thereby enhancing the cytotoxicity of CD8 + T cells. Thus, we tried to investigate whether chitosan-poly(acrylic acid) nanoparticles (CS-PAA NPs) loaded with R848 and MnCl 2 (R-M@CS-PAA NPs) could exert an anti-tumor effect by regulating the function of immune cells. Methods R-M@CS-PAA NPs were prepared, and their basic characteristics, anti-tumor effect, and potential mechanisms were explored both in vitro and in vivo. Results R-M@CS-PAA NPs easily released MnCl 2 and R848 at low pH. In B16F10 mouse melanoma model, R-M@CS-PAA NPs exerted the most significant anti-melanoma effect compared with the control group and CS-PAA NPs loaded with R848 or MnCl 2 alone. FITC-labeled R-M@CS-PAA NPs were displayed to be accumulated at the tumor site. R-M@CS-PAA NPs significantly increased the infiltration of M1 macrophages and CD8 + T cells but reduced the number of suppressive immune cells in the TME. Moreover, in vitro experiments showed that R-M@CS-PAA NPs polarized macrophages into the M1 phenotype to inhibit the proliferation of B16F10 cells. R-M@CS-PAA NPs also enhanced the killing function of CD8 + T cells to B16F10 cells. Of note, R-M@CS-PAA NPs not only promoted the maturation of APCs such as dendritic cells and macrophages by STING and NF-кB pathways, but also enhanced the ability of dendritic cells to present ovalbumin to OT-I CD8 + T cells to enhance the cytotoxicity of OT-I CD8 + T cells to ovalbumin-expressing B16F10 cells. Conclusion These data indicate that the administration of R-M@CS-PAA NPs is an effective therapeutic strategy against melanoma.
研究领域:
药理学
·
免疫学
·
纳米技术
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2015
·
IF 2.79
Jingying Pan,Jie Fu,Xiuyang Lu
A systematic study on microwave-assisted oxidative degradation of lignin model compounds, such as 2-phenoxy-1-phenylethanol, vanillyl alcohol, and 4-hydroxybenzyl alcohol, was performed by evaluating the catalytic activity of 14 types of metal salts. The acidity of each metal salt solution for the oxidative degradation of 2-phenoxy-1-phenylethanol, vanillyl alcohol, and 4-hydroxybenzyl alcohol under the microwave irradiation and conventional heating conditions was measured and compared. The results showed that CrCl3 and MnCl2 were the most effective for the degradation of the lignin model compounds. The acidity of metal salt is in favor of the catalytic activity for the degradation of 2-phenoxy-1-phenylethanol, vanillyl alcohol, and 4-hydroxybenzyl alcohol, and microwave irradiation is able to accelerate the degradation rate in a large scale. The possible mechanisms for the degradation of 2-phenoxy-1-phenylethanol, vanillyl alcohol, and 4-hydroxybenzyl alcohol are proposed on the basis of the product distributions.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2026
·
IF 3.4
Changwei Xiang,Kun Shi,Weiqiang Dong,Huixin Xiong
In this study, ferrihydrite composites of MnO 2 /Fh and PANI/Fh could form from bacterially oxidized Fe(III)-solutions mixing MnCl 2 (Mn/Fe =1) and polyaniline (PANI, 10 mg) at pH 8.0 −10.0, respectively. They could be used to remove P from the (waste)waters. The prepared MnO 2 /Fh wwas identified as Fh, γ-MnO 2 and γ-MnOOH phases by XRD, FTIR and XPS, and the other composite was PANI/Fh. Adsorption processes fitted to the first/second-order rate models and Weber-Morris intraparticle diffusion model (R 2 ranging in 0.920–0.999), and were spontaneous, endothermic and random. Isothermal adsorptions could be well described by Langmuir model (R 2 of 0.991–0.997) and Freundlich model (R 2 of 0.933 −0.979). The maximal P (10 mg/L) adsorption capacities ( Q e ) were 99.3 mg/g (PANI/Fh) and 84.3 mg/g (MnO 2 /Fh), while that of Fh was 53.6 mg/g at pH7.0. There were the wide pH ranges for PANI/Fh (3.0 −11.0) and MnO 2 /Fh (3.0 −8.0), and the presence of CO 3 2- ion declined P removal efficiencies. The main adsorption mechanisms were electrostatic attraction, ion exchange, and surface complexation. Two Fh composites still had the better abilities of treating P-containing neutral river waters after three regenerations. It provides the potential approaches for preparing Fe-composites and removing P using waste bacterial Fe(III)-solutions.
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·Vol. 43
·期 16
·7973-7981
·
IF 4.229
Shaowei Yang,Hui Xie,Hongwei Zhu,Lijuan Zhang,Yunshan Zhou,Huixian Zhang,Zipeng Zhao
In this work, metal-organic framework compound CPL-1 of a formula {[Cu 2 (pzdc) 2 (pyz)]⋅2H 2 O} n (pzdc = pyrazine-2,3-dicarboxylate, pyz = pyrazine) possessing kinetic quantum sieving effect on H 2 /D 2 separation was selected to prepare two new chromatography stationary phase materials CPL-1@γ-Al 2 O 3 and MnCl 2 @CPL-1@γ-Al 2 O 3 by loading CPL-1 on γ-Al 2 O 3 particles with size 80–100 mesh through repeating in situ crystallization process , and afterwards by loading MnCl 2 on CPL-1@γ-Al 2 O 3 via impregnation approach. The two optimized materials were thoroughly characterized by IR, XRD , SEM, EDS and TG/DTA method. The experimental results showed that, under liquid nitrogen temperature by using just 1-m chromatographic column and cheap He gas as carrier gas, the MnCl 2 @CPL-1@γ-Al 2 O 3 can solve the problem of long separation time and trailing phenomenon existing in the CPL-1@γ-Al 2 O 3 column, can realize highly effective hydrogen isotope H 2 /D 2 separation with good separation resolution (R = 1.62) and approximate Gauss distribution of chromatographic peak, can be used for both qualitative and quantitative analysis of hydrogen isotope H 2 /D 2 with short separation time of 6.5 min.
研究领域:
分离科学
·
材料化学
·
物理化学
·
核化学
·
色谱学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）