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2023年4月嘲风作品集（二）

已有 657 次阅读 2023-6-26 16:10 |个人分类:作品发表|系统分类:论文交流

▲ Vol 23 Issue 07 | 12 April, 2023

Epitaxial Growth of Large Area Two-Dimensional Ferroelectric α-In2Se3

Qinming He, Zhiyuan Tang, Minzhi Dai, Huili Shan, Hui Yang, Yi Zhang, and Xin Luo

Two-dimensional (2D) ferroelectric materials have attracted intensive attention in recent years for academic research. However, the synthesis of large-scale 2D ferroelectric materials for electronic applications is still challenging. Here, we report the successful synthesis of centimeter-scale ferroelectric In2Se3 films by selenization of In2O3 in a confined space chemical vapor deposition method. The as-grown homogeneous thin film has a uniform thickness of 5 nm with robust out-of-plane ferroelectricity at room temperature. Scanning transmission electron microscopy and Raman spectroscopy reveal that the thin film is 2H stacking α-In2Se3 with excellent crystalline quality. Electronic transport measurements of In2Se3 highlight the current–voltage hysteresis and polarization modulated diode effect due to the switchable Schottky barrier height (SBH). First-principles calculations reveal that the polarization modulated SBH is originated from the competition between interface charge transfer and polarized charge. The large area growth of epitaxial In2Se3 opens up potential applications of In2Se3 in novel nanoelectronics.

https://pubs.acs.org/doi/10.1021/acs.nanolett.2c04289

▲ Vol 03 Issue 04 | 14 April, 2023

Unveiling the Neglected Roles of Chloride and Sulfate in the Removal of Nitro Compounds by Sulfidated Zero-Valent Iron/Ferrous Ion Systems

Shiwen Sun, Xueran Xu, Xiaofei Jiang, Yuhang Yue, Yinshun Dai, Xiaowei Yang, Qi Xiu, Liangfeng Duan, and Shan Zhao

Ferrous ions (Fe2+) can effectively promote the removal of pollutants by sulfidated zero-valent iron (S-ZVI), but the role of anions coexisting with Fe2+ was often ignored. This study systematically compared the performances of S-ZVI/FeCl2 and S-ZVI/FeSO4 systems for chloramphenicol (CAP) and nitrobenzene (NB) removal. The results showed that FeCl2 and sulfidation had a synergistic promoting effect on the reaction, but FeSO4 could not promote the removal of nitro compounds by S-ZVI. Liquid chromatography/mass spectrometry (LC/MS) and UV–vis analysis showed that only the nitro group was reduced during the removal of CAP and NB. The results of batch experiments showed that both NaCl and Na2SO4 could effectively promote the reaction, but the promotion effect of Na2SO4 weakened with the decrease of pH. X-ray photoelectron spectroscopy (XPS) analysis showed that Fe2+ could promote the adsorption of SO42– on the surface of S-ZVI. A possible mechanism was proposed: Fe2+ could maintain a low pH level because of hydrolysis, which promoted the adsorption of Cl– and SO42– on the surface of S-ZVI. Cl– promoted the reaction because of its pitting corrosion, while SO42– competed with nitro groups for the adsorption sites. Our findings suggest that the coexisting anions are quite essential in the removal of nitro compounds by S-ZVI/Fe2+ systems.

https://pubs.acs.org/doi/10.1021/acsestwater.2c00661

▲ Vol 05 Issue 04 | 14 April, 2023

Integrated Thermoelectric Design Inspired by Ionic Liquid Microemulsion-Based Gel with Regulatable Dual-Temperature Responsiveness

Yuzhen Qian, Chunxiao Chai, Ping Qi, Lin Ma, and Jingcheng Hao

The concept and principles of chromatic engineering of electrolytes have demonstrated charming prospects for constructing pluralistic electrochromic devices. Here, we develop a synthetic design bearing thermochromic and electrochromic behaviors based on the ionic liquid (IL) microemulsion-based gel, driven by the intrinsic thermodynamic stability of microemulsion and ionic conductivity of IL. The prepared gel can tune light-scattering behaviors as the droplet expanded or aggregated when the temperature is out of its thermodynamically stable temperature range. Not only that, oil-phase IL ([EMIM]TFSI) as well as introduced LiCl and LiTFSI endows it with satisfactory ionic conductivity, making it able to be utilized as a free-standing electrolyte layer for the electrochromic smart window. Therefore, the fabricated smart window based on this gel and WO3 electrochromic layer successfully realizes dual-stimuli responsiveness for both temperature and electric field, possessing energy-saving combined with privacy protection function. In addition, the component compatibility of microemulsion allows the harmonious introduction of hydrophilic antifreeze moisturizer ethylene glycol (EG) and hydrophobic ultraviolet absorber 2-hydroxy-4-(octyloxy)benzophenone (2H4MBP), which further promotes the multifunctional integration of a smart window for the strengthened safety factor, anti-freezing, anti-drying, and anti-UV capabilities. Finally, we extend the application of the IL microemulsion-based gel to an ionic writing plate based on the same electrochromic mechanism. In brief, this innovative preparation method paves the way for multifunctional electrochromic devices.

https://pubs.acs.org/doi/10.1021/acsapm.3c00169

▲ Vol 25 Issue 14 | 14 April, 2023

Study on the trace moisture influence on the adhesion phenomenon in Cd-based crystal growth

Kejing Liu, Zhengyi Sun, Ziang Yin, Xianggang Zhang, Qinghua Zhao, Wanqi Jie and Tao Wang

The wetting and sticking phenomena are the principal factors that lead to dislocation, parasitic grain nucleation, cracking, and other issues during crucible-based crystal growth of Cd-based crystals (CdTe/Cd1−xZnxTe). The trace amount of moisture in raw materials is an important factor influencing the sticking process, but this has not been sufficiently studied. Here, we investigate the chemical reactions between trace moisture and raw Cd materials by introducing H2O intentionally. The X-ray photoelectron spectra of the sticky surface indicate that residual moisture can react with raw Cd and generate more CdO compared with the untreated Cd. The reactive gas atmosphere process (RAP) method with a self-designed crucible was modified for the removal of moisture and reaction products. The waste products of the RAP method were successfully separated and determined to be CdCl2, CdCO3, CdO, and SiO2. The whole chemical process of oxidation and the RAP method was proposed accordingly. The purified Cd showed a spherical shape derived from the surface tension and de-wetting with the bare quartz crucible. These studies provide a comprehensive description of the moisture-driven oxidation behavior of Cd responsible for the sticking problem of the Cd/SiO2 system, which may guide high-quality Cd-based crystal growth techniques.

https://pubs.rsc.org/en/content/articlelanding/2023/ce/d2ce01553f

▲ Vol 11 Issue 14 | 14 April, 2023

Review on the advancement of SnS2 in photocatalysis

Xiaowen Guo, Fen Zhang, Yongcai Zhang and Junhua Hu

SnS2 is a CdI2-type layered non-noble metal sulfide semiconductor. SnS2 has the characteristics of suitable band gap, good photochemical stability, excellent photoelectrical activity and high carrier mobility, which enable its photoelectric and photocatalytic application prospects. In this study, the progress of SnS2 application in photocatalysis is reviewed. The properties of SnS2 materials in various photocatalytic applications and related mechanisms are introduced. The main activity improvement methods of SnS2 photocatalysts and possible development directions in the future are discussed and researched.

https://pubs.rsc.org/en/content/articlelanding/2023/ta/d2ta09741a

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