Effectively boosting selective ammonia synthesis on
1. Introduction. In addition to as a key raw material for producing fertilizers, plastic, pharmaceuticals and so on, ammonia (NH 3) also serves as an ideal carbon-free energy …
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1. Introduction. In addition to as a key raw material for producing fertilizers, plastic, pharmaceuticals and so on, ammonia (NH 3) also serves as an ideal carbon-free energy …
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A sandwich electrochemical biosensing strategy for ultrasensitive detection of miRNA-21 was developed by using graphene oxide incorporated 3D-flower-like MoS2 (3D MoS2-rGO) nanocomposites as the substrate and horseradish peroxidase (HRP)-functionalized DNA strand 1 (S1)-gold nanoparticles (S1-AuNPs-HRP) as signal …
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Developing multifunctional flying perceptibility, by mimicking the biological system, is meaningful for aircrafts to adapt to the complicated and ambiguous flow environment.
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The conversion of molecular dinitrogen into ammonia is one of the most important chemical processes, which involves the inert N [[triple bond, length as m-dash]] N bond activation …
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1. Introduction. Cr(VI) has been extensively used in various industries including electroplating, leather tanning, and wood preservation (Kieber et al., 2002).Cr(VI) is non-biodegradable (Deep et al., 2014) and considered as a serious Class I carcinogen to human beings (Wei et al., 2016).Cr(VI) released into water and soil may be transferred to …
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Enhancing solar energy conversion is imperative and maximizing solar energy capture remains significant. Here, nanotechnology toward engineering hybrid photosystem involving biological …
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Tingting Qing. View author publications. ... c, C 1s X-ray photoelectron spectra (b) and overall spectra (c; binding energy of 0–293 eV) of the LBC-G cathode before and after …
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Qing dynasty, the last of the imperial dynasties of China, spanning the years 1644 to 1911/12. Under the Qing the territory of the empire and its population grew significantly, many of the non-Chinese minorities within the empire were Sinicized, and an integrated national economy was established.
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Advanced Energy Materials is your prime applied energy journal for research providing solutions to today's global energy challenges. Abstract Tuning material properties by modulation of the arrangement of atoms is a fundamental and effective strategy in materials science. Structurally long-range ordered materials are increasingl...
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We demonstrate the reversible insertion of anions into a hydrocarbon material in an aqueous system. The PAH electrode delivers a reversible capacity of ~65 mAh g−1, giving a CE of ~73% in the first cycle. The CE efficiency continues to increase, where by the 20th cycle a CE of ~92% is obtained. The lower CE in the first 20 cycles is ...
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The tunable light absorption offered by the simple structure with an all-dielectric configuration will provide potential applications for graphene-based optoelectronic devices in the near-infrared range, such as narrowband selective filters, detectors, optical switches, modulators, slow optical devices, etc. Optical switches based on dielectric …
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Ultrathin two-dimensional (2D) porous Zn(OH)2 nanosheets (PNs) were fabricated by means of one-dimensional Cu nanowires as backbones. The PNs have thickness of approximately 3.8 nm and pore size of 4–10 nm. To form "smart" porous nanosheets, DNA aptamers were covalently conjugated to the surface of PNs. These …
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NanoES were then combined with synthetic or natural macroporous ECMs providing ECMs with electrical sensory function and nanoES with biochemical environments suitable for tissue culture. Finally ...
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Figs. 1 (a) and (b) shows the unit structure and its top view of the multi-function and dual-band metasurface polarization converter based on graphene and VO 2.As can be seen from Fig. 1 (a), the unit structure of the converter consists of a pair of VO 2 rectangular column at the top, a graphene disk layer with a rectangular hole in the …
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Next, we explored the scope of the copper(II)-catalyzed nucleophilic trifluoromethylation of aromatic and heteroaromatic iodides ().Electron-deficient aryl iodides exhibited good reactivity and the products (3e–3m, 3p, and 3q) were obtained in 78–92% yields.While some electron-neutral (3a–3c) and electron-rich substrates (3s) gave the corresponding …
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A multi-ethnic empire. By the eighteenth century, the Qing dynasty ruled over a vast territory, from Mongolia to Tibet to Xinjiang in Central Asia. During the eighteenth century, partly because of the influx of New World crops like …
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SARS-CoV-2 virions are surrounded by a lipid bilayer that contains membrane proteins such as spike, responsible for target-cell binding and virus fusion. We found that during SARS-CoV-2 infection, spike becomes lipid modified, through the sequential action of the S-acyltransferases ZDHHC20 and 9. Pa …
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Electrocatalytic nitrogen reduction reaction (NRR) is a sustainable approach for NH3 production with low energy consumption. However, competing hydrogen reduction reaction (HER) in aqueous solution results in low NH3 production and Faraday efficiency (FE). Here, MoS2 nanostructures with a hydrophobic surface are synthesized by alkyl …
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The schematic illustrations of 2D film fabrication processes through hot-casting (HC) and post-annealing (PA) can be seen in Fig. 1 a. For the approach of HC, the substrate with a compact layer of TiO 2 was preheated at 100 ° C for 10 min before the deposition of perovskite layer through spin-coating of precursor solution. PA is a widely …
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Notably, we find that THz emission is locked to the polarization state (PS) and incident direction: THz E-field sign, amplitude, and direction are fully controlled by incident pump polarization and helicity (i.e., its polarization state) as well as the incident angle. Fig. 1. THz emission from PtSe 2 in transmission mode.
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Recently, numerous graphene-based structures have been proposed to improve the absorption properties, including graphene grating, 21, 22 micro-ribbons, 23 and micro-disk arrays. 24 The optical absorption of a suspending graphene monolayer is merely 2.3% under normal incidence in the visible and near-infrared regions. 25 Coupling of …
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Introduction Messenger RNA (mRNA) can be translated into functional proteins in the ribosomes, and differential expression of mRNA in cells has been shown to be correlated with some diseases. 1,2 For example, the imbalanced expression of manganese superoxide dismutase (MnSOD) mRNA is closely related to tumor …
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Sông Sắt là một con sông phụ lưu của sông Đáy. Sông chảy theo hướng bắc - nam, nối từ sông Châu Giang đổ ra Sông Đáy. Sông có chiều dài 39 km và diện tích lưu vực là km². Sông Sắt chảy qua các tỉnh Hà Nam, Nam Định rồi đổ vào sông Đáy tại vị …
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Global ammonia production reached 175 million metric tons in 2016, 90% of which is produced from high purity N2 and H2 gases at high temperatures and pressures via the …
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Abstract. Negative capacitance is a newly discovered state of ferroelectric materials that holds promise for electronics applications by exploiting a region of thermodynamic space …
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NOTE: #: equal contribution, *: corresponding author. 2015; 2014; Pang, P., Ashcroft, B.A., Song, W., Zhang, P., Biswas, S., Qing, Q., Yang, J., Nemanich, R.J., Bai ...
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Quặng sắt chính là nguyên liệu đầu vào cho quá trình sản xuất ra kim loại sắt và các hợp chất của sắt phục vụ cho nhiều lĩnh vực quan trọng như: xây dựng, chế tạo,…. Việc tìm …
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Quặng sắt [1] là các loại đá và khoáng vật mà từ đó sắt kim loại có thể được chiết ra có hiệu quả kinh tế. Quặng sắt thường giàu các sắt oxit và có màu sắc từ xám sẫm, vàng tươi, tía sẫm tới nâu đỏ. Sắt thường được tìm thấy dưới dạng magnetit ( Fe. 3O. 4 ...
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Kangxi of China. Emperor Kangxi of China, also known as K'ang-hsi, May 4, 1654 – December 20, 1722) was the fourth Emperor of China of the Manchu Qing Dynasty (also known as the Ching), and the second Qing …
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Bài 1 trang 42 KHTN lớp 6: Hãy chỉ ra đâu là vật thể, đâu là chất trong các câu sau: a) Cơ thể người chứa 63% - 68% về khối lượng là nước. b) Thuỷ tinh là vật liệu chế tạo ra nhiều vật gia dụng khác nhau như lọ hoa. cốc, bát, nồi... c) Than chì là vật liệu chính làm ruột ...
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Advanced Energy Materials is your prime applied energy journal for research providing solutions to today's global energy challenges. Abstract Lithium-rich manganese-based layered oxides (LMLOs) are considered to be one type of the most promising materials …
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To evaluate the performance of PVSCs using the s-NiO x as the HTL, we fabricated the solar cells with a p-i-n configuration of FTO/s-NiO x /Perovskite (MAPbI 3)/C 60 /BCP/Ag. Fig. 2 a presents the current-voltage (J-V) characteristics of the s-NiO x based PVSC under 100 mW/cm 2 simulated AM 1.5G illumination. At the initial light exposure, …
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