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Cover Illustration
2019, Vol.5  No.2
The cover picture shows the hierarchical porous N-doped carbon fabricated from the renewable biomass soft wood. The as-made porous N-doped carbon with large surface area can remove Cr(VI) in solution efficiently and rapidly. A part of Cr(VI) ions were reduced to Cr(III) due to the reduction effect of electro-donor groups. This hierarchical porous N-doped carbon is a promising candidate for the removal of other heavy metals from wastewater. More details are discussed in the article by Yan on page 180024.
Online ISSN: 2414-3421
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  • Table of Content
      29 June 2019, Volume 5 Issue 2 Previous Issue    Next Issue
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    Contents: Gen. Chem. 2/2019
    General Chemistry. 2019, 5 (2): 199002-199002.  
    Abstract   PDF (354KB) ( )
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    Interview with Professor Kai Yan
    Kai Yan
    General Chemistry. 2019, 5 (2): 198003-198003.   DOI: 10.21127/yaoyigc20198003
    Abstract   PDF (134KB) ( )
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    A-D-A Structured Small-Molecule Hole Transporting Materials for Dopant-Free Perovskite Solar Cells
    Yuanyuan Kan, Bo Xu, Ke Gao*
    General Chemistry. 2019, 5 (2): 180026-180026.   DOI: 10.21127/yaoyigc20180026
    Abstract   PDF (623KB) ( )
    Hole-transporting materials (HTMs) are necessary for highly efficient perovskite solar cells (PSCs) to enable the hole carriers extraction and transport. There are designed varieties of HTMs so far, including small molecules and polymers. However, most of them have to be doped to get the high mobility and conductivity. Otherwise, the dopant will deteriorate the long-term stability and efficiency, which is a bottleneck for the commercialization of PSCs. The development for non-doping HTMs, which can replace the traditional doped HTMs, brings great hope to this field. Among them, acceptor (A)-donor (D)-acceptor (A) type non-doping HTMs are an important portion. In this min-review, we summarize all the A-D-A type non-doping HTMs and their properties.
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    Membrane Science and Membrane Engineering: a Successful Story
    Enrico Drioli, Elena Tocci, Francesca Macedonio
    General Chemistry. 2019, 5 (2): 180027-180027.   DOI: 10.21127/yaoyigc20180027
    Abstract   PDF (837KB) ( )
    Membrane engineering is one of the disciplines most involved in the technological innovations necessary to face the problems characterizing the world today and in future such as water shortage, raw material depletion, and energy consumption. Membrane operations contribute to solving these problems, and the potentialities of membrane operations have been widely recognized in the last few years. In this work, an overview of membrane applications and their perspectives in the field of membrane materials, membrane modelling and water treatment will be analyzed. The scope of this study is to show how membranes, membrane operations and their integration could contribute to the redesign of membrane engineering in the logic of the process intensification strategy.
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    State of the Art on Sb2(S1-x, Sex)3 Thin Film Solar Cells
    Thalía Jiménez, C. I. León-Pimentel, Diego Seuret-Jiménez, Maykel Courel
    General Chemistry. 2019, 5 (2): 180029-180029.   DOI: 10.21127/yaoyigc20180029
    Abstract   PDF (752KB) ( )
    The Sb2(S1-x, Sex)3 compound has received considerable attention in photovoltaic applications due to its physical properties and for containing abundant non-toxic elements. However, solar cells based on this material present low efficiencies. In this work, we review some of the physical properties reported for the semiconductors Sb2S3, Sb2Se3 and Sb2(S1-x, Sex)3, and the main techniques of film deposition of the Sb2(S1-x, Sex)3 ternary material along with the reported efficiencies. Finally, a brief review of the scarce theoretical analyses of the main properties of this semiconductor (refractive index, band-gap energy, absorption coefficient and recombination) is presented. This review remarks the need of more theoretical analyses and modeling to optimize and improve the fabrication processes of Sb2(S1-x, Sex)3 solar cells in order to reach better conversion efficiencies.
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    Efficient Removal of Cr(VI) from Aqueous Solution on the Hierarchical Porous N-Doped Carbon Derived from Soft Wood
    Ruiqi Li, Wei Shi, Yiran Lu, Di Hu, Kai Yan
    General Chemistry. 2019, 5 (2): 180024-180024.   DOI: 10.21127/yaoyigc20180024
    Abstract   PDF (688KB) ( )
    Efficient removal of Cr(VI) is one of challenges in wastewater treatment and remediation. The hierarchical porous N-doped carbon derived from renewable soft wood is facilely fabricated by a solvo-hydrothermal method and utilized to remove Cr(VI) efficiently. The as-obtained N-doped carbon exhibits hierarchical porous structure and large specific surface area of 324.2 cm2/g. The fabricated N-doped porous carbon can rapidly and efficiently adsorb Cr(VI) in 1 h and the adsorption process follows the pseudo-second-order model. The high adsorption capacity of 182.8 mg/g based on Langmuir model, and it is competitive with other carbon materials reported to date. Besides, the hierarchical porous carbon is easy to be recycled and the adsorption performance maintains stable over five runs.
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