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Fei Liu

Bio: Fei Liu is an academic researcher from Tianjin University. The author has contributed to research in topics: Crystallographic defect & Materials science. The author has an hindex of 1, co-authored 3 publications receiving 6 citations.

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TL;DR: In this paper, the authors summarized the growth defects of organic crystals from four perspectives; formation mechanism, characterization methods, control methods, and applications, and concluded three kinds of formation mechanism which are related to diffusion of solute molecules, impurities participating in the crystal growth, and structure of solutes respectively.

11 citations

Journal ArticleDOI
TL;DR: Pyridoxine hydrochloride, commonly known as vitamin B6 (VB6), is considered to be one of the most essential vitamin enhancers as mentioned in this paper, and its crystal morphology is of paramount interest in the p...
Abstract: Pyridoxine hydrochloride, commonly known as vitamin B6 (VB6), is considered to be one of the most essential vitamin enhancers. Understanding its crystal morphology is of paramount interest in the p...

8 citations


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27 Jul 2022
TL;DR: In this article , the authors demonstrated various engineering defect strategies in graphitic carbon nitride (g-C3N4) to promote photocatalytic efficiency under solar energy.
Abstract: Excessive release of greenhouse gas carbon dioxide (CO2) into the atmosphere and continuous utilization of fossil fuels has resulted in global warming and energy shortage. Among the different alternatives, photocatalytic conversion of CO2 to fuels and hydrogen production is a promising approach. To achieve this goal, highly efficient and low-cost semiconductor are demanding to maximize solar energy conversion to renewable fuels. In this perspective, metal free two-dimensional (2D) graphitic carbon nitride (g-C3N4) has attracted numerous considerations because of its low cost and higher reduction potential, but it has a lower efficiency. Herein, we demonstrated various engineering defect strategies in g-C3N4 to promote photocatalytic efficiency under solar energy. Initially, an overview of engineering defects, creation of different vacancies in g-C3N4, and their identification is discussed. In the main stream defect, engineering such as carbon, nitrogen, and oxygen to promote g-C3N4 photocatalytic efficiency is systematically disclosed. Subsequently, the role of sulfur (S) and phosphorus (P) atoms in g-C3N4 to maximize CO2 reduction and hydrogen production are deliberated. The comparative analysis, efficiency enhancement, and role of defect engineering are finally discussed to get higher yields and productivities under solar energy utilization.

18 citations

Journal ArticleDOI
TL;DR: In this article, a systematic study through batch cooling crystallization, slow solvent evaporation, seeded single crystal growth, solid-state characterization, and molecular simulation was carried out to explore the mechanism of polymeric additives on morphology modulation and growth inhibition.

8 citations

Journal ArticleDOI
TL;DR: Selinger et al. as discussed by the authors reported a series of halogen-substituted benzil crystals showing elastic bending (within ∼2.45% strain), followed by elastoplastic deformation under ambient conditions.
Abstract: As an emerging class of flexible materials, mechanically bendable molecular crystals are broadly classified as elastic or plastic. Nevertheless, flexible organic crystals with mutually exclusive elastic and plastic traits, with contrasting structural requirements, co-existing under different stress settings are exceptional; hence, it is imperative to establish the concurring factors that beget this rare occurrence. We report a series of halogen-substituted benzil crystals showing elastic bending (within ∼2.45% strain), followed by elastoplastic deformation under ambient conditions. Under higher stress settings, they display exceptional plastic flexibility that one could bend, twist, or even coil around a capillary tube. X-ray diffraction, microscopy, and computational data reveal the microscopic and macroscopic basis for the exciting co-existence of elastic, elastoplastic, and plastic properties in the crystals. The layered molecular arrangement and the weak dispersive interactions sustaining the interlayer region provide considerable tolerance towards breaking and making upon engaging or releasing the external stress; it enables restoring the original state within the elastic strain. Comparative studies with oxalate compounds, wherein the twisted diketo moiety in benzil was replaced with a rigid and coplanar central oxalate moiety, enabled us to understand the effect of the anisotropy factor on the crystal packing induced by the C Created by potrace 1.16, written by Peter Selinger 2001-2019 O⋯C tetral interactions. The enhanced anisotropy depreciated the elastic domain, making the oxalate crystals more prone to plastic deformation. Three-point bending experiments and the determined Young's moduli further corroborate the co-existence of the elastic and plastic realm and highlight the critical role of the underlying structural elements that determine the elastic to plastic transformation. The work highlights the possible co-existence of orthogonal mechanical characteristics in molecular crystals and further construed the concurrent role of microscopic and macroscopic elements in attaining this exceptional mechanical trait.

8 citations

Journal ArticleDOI
TL;DR: In this article, a coarse-grained pseudoboehmite was obtained by neutralization of an ammonium aluminum sulfate solution [NH4Al(SO4)2·12H2O] with ammonia water in the presence of sodium dodecylbenzene sulf...
Abstract: Coarse-grained pseudoboehmite was obtained by neutralization of an ammonium aluminum sulfate solution [NH4Al(SO4)2·12H2O] with ammonia water [NH3 (aq)] in the presence of sodium dodecylbenzene sulf...

6 citations