这项研究得到了 CARS-tea 和中国农业科学院创新项目 （CAAS-ASTIP-TRI） 的支持。

1. 抹茶包埋悬架的生产
<ol><li>将 4 g 羧甲基壳聚糖（参见 材料表）放入 100 mL 蒸馏水中，制备 0.04 g/mL 羧甲基壳聚糖储备液。将羧甲基壳聚糖溶解，在恒温加热磁力搅拌器上加热至 60°C。</li>
	<li>将 4 g 乳清蛋白（参见 材料表）溶于 50 mL 蒸馏水中，制备 0.08 g/mL 乳清蛋白储备液。</li>
	<li>溶液冷却后，将它们存放在冰箱中并冷藏过夜以使聚合物分子完全饱和。</li>
	<li>将 8 克抹茶和 4 克 NaCl（参见 材料表）放入烧杯中，加入 50 mL 无菌开水制备抹茶浆液。使用玻璃搅拌棒协助溶解过程。无菌水是在锅中煮沸 15 分钟的去离子水。</li>
	<li>将抹茶浆液与 50 mL 羧甲基壳聚糖溶液混合，并在室温下以 300 rpm 的速度与磁力搅拌装置混合。</li>
	<li>将 25 mL 乳清蛋白滴入混合物中，并以 300 rpm 的速度搅拌 30 分钟，以形成包埋的悬浮液。（参见 图 1）。悬浮液应与面条生产同时制备，并在同一天在 4 °C 的温度下储存。 注：抹茶包埋的悬浮液的 pH 值未调整，因此仅受抹茶或壁材料的影响。</li>
</ol>2. 小麦粉的微波处理
<ol><li>将 300 克小麦粉装在一个圆形塑料容器中。用保鲜膜盖住容器，然后将其放入 700 W 的微波炉中 60 秒。之后，将装有面粉的容器放在外面，直到感觉凉爽。</li>
</ol>3. 抹茶面的生产
<ol><li>面团混合：将 125 mL 预成型的抹茶包埋悬浮液和 15 mL 水慢慢倒入 300 g 微波处理的小麦粉中。轻轻地将面粉一点一点地拉到中心，直到嵌入的悬浮液加入。<ol><li>对于未经微波处理的小麦粉，使用 125 mL 水代替抹茶包埋的悬浮液来制备面条，面条被标记为空白面条（对照）。将 125 mL 水和 8 g 抹茶加入未经微波处理的小麦粉中，制成面条，并将其命名为抹茶面（M-noodles）。</li>
	</ol></li>
	<li>揉面团：用面团搅拌机揉面团 7 分钟。面团应该是光滑和柔韧的，完成后不要潮湿或粘稠。</li>
	<li>静置：将面团球放回搅拌碗中，用湿茶巾盖住。让它在室温下静置 30 分钟。</li>
	<li>如下所述准备面条。<ol><li>将面团分成 4 等份，然后重新包装 3 块并放在一边。在未包装的那块上轻轻撒上面粉，偶尔提起以确保它不会粘住。</li>
		<li>将压面机的压辊间距调整为 3.5 毫米。将面团放在面团上压成薄片，然后复合。反复按压面团片，直到达到光滑柔韧的稠度。</li>
		<li>将面团片稀释至 1 毫米。从 3.5 mm 开始，将压辊间距调整为 2 mm，然后调整为 1 mm。在每个辊间距中按压板材 3 次。</li>
		<li>用保鲜膜松散地盖住，然后对剩余的面团重复步骤 3.4.1-3.4.3。 注：为保证每批样品的压制过程一致，压辊间距调整一次，每次通过试样后调整下一次间距。</li>
		<li>将面条切成 22 厘米长、1 毫米厚和 3.0 毫米宽的样品（见 图 2）。撒上约 3.75 克粗面粉，确保面条不会粘在一起。</li>
	</ol></li>
</ol>4. 感官评价和物理性能分析
<ol><li>感官评估<ol><li>将 30 克面条放入 600 毫升沸水中，煮 5 分钟。测试前，立即将煮熟的面条浸入冷水中。</li>
		<li>使用 Li 等人 12 中概述的定量描述性分析 （QDA） 对面条样品进行感官评估。确保样本的感官特征由 12 名训练有素的小组成员使用 9 点享乐量表进行评估，其中 9 表示非常喜欢，1 表示非常不喜欢。</li>
	</ol></li>
	<li>颜色测量<ol><li>将煮熟的和新鲜的样品切成约 10 厘米的块，然后将它们放在色度计的仪器孔下。</li>
		<li>按下仪器按钮测量新鲜面条的颜色，并对每个样品重复测试 6 次。</li>
	</ol></li>
	<li>质构分析仪<ol><li>使用质构仪确定熟面条和新鲜面条的质构特性，并根据质构剖面分析 （TPA） 进行计算。</li>
		<li>将五根面条放在测试台上，对每个样品重复测试 6 次。</li>
	</ol></li>
</ol>5. 数据分析
<ol><li>通过方差分析 （ANOVA） 分析数据，并认为当 p < 0.05 时差异显著。</li>
</ol>

颜色稳定的抹茶新鲜面条生产的进展

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作者没有什么可披露的。

与方便面、细干面和其他类似产品相比，新鲜面条具有更强的保留其原汁原味和风味的能力，使其在市场上极具前景。之前的一项研究表明，绿茶可以在一定程度上提高新鲜面条的整体品质16。因此，将茶叶加入鲜面的面粉产品系统旨在优先考虑高品质和健康益处，符合当代提倡自然和追求绿色健康饮食的趋势。然而，茶中的多酚和色素等化合物在茶叶鲜面条的周围储存环境中?...

面条是中国传统谷物菜肴的主食，亚洲国家约 40% 的小麦产量用于面条加工1。然而，小麦粉的基本营养成分不足以满足消费者日益增长的营养需求。因此，一些研究人员选择用替代天然成分代替面条中的部分小麦粉，例如燕麦麸2、牛奶蛋白3、红薯4 和柑橘大促5，以增强面条的营养和功能品质。抹茶是一种丰富的生物活性化合物，具有抗氧化和抗炎特性，有可能降低患心血管疾病的风险并预防慢性疾病6。因此，人们对研究将抹茶融入传统美食的兴趣日益浓厚，包括中式蒸面包、年糕，尤其是新鲜面条。
然而，鲜面条容易出现随时间而变暗的情况，导致产品的视觉外观发生不利的变化，这对鲜面条的储存构成重大挑战7.人们普遍认为，在新鲜面条的储存过程中观察到的变色主要是由多酚氧化酶 （PPO） 的存在引起的7,8。此外，研究表明可溶性蛋白质组分参与非多酚氧化酶 （non-PPO） 变暗的过程9.近年来，人们投入了大量精力来减轻 PPO 在储存过程中的变黑。先前的研究表明，应用于生面条的酸抑制剂和热处理可以通过使蛋白质变性并因此抑制酶活性来有效实现这一目标10,11。叶绿素容易受到 pH 值、温度和热量变化的影响，绿茶面条充满活力的绿色色调主要归功于叶绿素10。显然，通过直接添加酸抑制剂和热处理来有效控制绿茶面的颜色存在局限性。
除了小麦粉的热加工外，抹茶面条中叶绿素的保存也是一个需要考虑的关键因素。已经提出了几种方法来延长叶绿素的储存时间并保留其色素，包括使用碱化剂、铜络合和低温储存12。不幸的是，大多数过程都需要接近自然的 pH 值，以减少不利化学反应的发生。叶绿素衍生物的铜复合物可能会减轻稳定性问题，叶绿素衍生物表现出让人联想到天然叶绿素的绿色。然而，与人工色素相比，个体表现出对天然叶绿素的偏好。微胶囊化技术已成为解决提高生物活性化合物稳定性挑战的可行解决方案，它通过提供对氧气、pH 值、离子强度和温度等环境条件的屏障 13,14,15。到目前为止，人们一直在研究茶提取物、儿茶素和叶绿素在包埋在不同墙体材料中的稳定性和控释特性14。然而，尚未提出将微胶囊掺入面条中 15。
在这项研究中，我们描述了一种将抹茶与乳清蛋白和羧甲基壳聚糖包埋并微波处理小麦粉以获得颜色稳定的抹茶新鲜面条的方法。在食品中添加微胶囊化生物活性化合物有助于创造新型功能性食品，同时保留固有的定性属性。我们展示了使用该加工方案获得的结果，以研究储存后抹茶面颜色值的变化。该研究的具体目标是确定制备具有独特颜色和风味的抹茶面的最佳方法。

<table><tbody><tr><td>Carboxymethyl chitosan</td><td>Mackin</td><td></td><td></td></tr><tr><td>Colorimeter</td><td>3nh</td><td>NH-300+</td><td></td></tr><tr><td>Dough mixer</td><td>ACA</td><td>AM-CG108</td><td></td></tr><tr><td>Freezer</td><td>Haier</td><td>BCD-252KS</td><td></td></tr><tr><td>Heating magnetic stirrer</td><td>Yuhua</td><td>DF-101S</td><td></td></tr><tr><td>Magnetic stirrer</td><td>Keezo</td><td>KMS-521D</td><td></td></tr><tr><td>Matcha</td><td>Jinhua Feicui</td><td></td><td></td></tr><tr><td>Microwave</td><td>Panasonic</td><td>NN-GF351X</td><td></td></tr><tr><td>NaCl</td><td>China National Salt Industry Corporation</td><td></td><td></td></tr><tr><td>Noodle maker</td><td>Tianxi</td><td>JCD-10</td><td></td></tr><tr><td>Texture analyzer</td><td>Lotun Science</td><td>TA-XT plus</td><td></td></tr><tr><td>Wheat flour</td><td>Queen</td><td></td><td></td></tr><tr><td>Whey protein</td><td>Yuanye</td><td></td><td></td></tr></tbody></table>

preparation of matcha fresh noodles with stable color using embedding method and microwave treatment

抹茶作为一种健康的食品添加剂，已广泛应用于面条、饼干和面包等传统食品中。然而，抹茶食品的质量必须解决几个挑战，其中最重要的是防止抹茶变色。在这项研究中，我们介绍了一种新方法，涉及将抹茶与乳清蛋白 （0.08 g/mL） 和羧甲基壳聚糖 （0.04 g/mL） 掺入，同时在 700 W 下微波处理小麦粉 60 秒，以生产颜色稳定的抹茶新鲜面条。文章介绍了抹茶鲜面条生产过程中涉及的所有步骤，包括抹茶包埋处理、小麦粉微波处理、揉面团、发酵、分割面团、擀面团和用压面机将片材切片。研究结果显示，与未处理的新鲜抹茶面相比，包埋和微波处理后新鲜抹茶面的变色减少了 72.13%。此外，组合过程对抹茶面的感官属性（包括其香气和味道）没有任何不利影响。因此，本研究提出的新方法对于增强新鲜抹茶面在制备过程中的颜色稳定性具有重要潜力。

该协议允许对加工抹茶食品和面条进行感官和物理特性分析，从抹茶处理开始，一直到加工的中间阶段到最终产品。该协议与嵌入和微波相结合以生产抹茶面 条（图 3）。将未包埋抹茶、包埋抹茶和微波处理、无抹茶的新鲜面条分别标记为 M-Noodles 、 ME-Noodles 和 control 。在对 3 种面条样品的感官评价方面，观察到微波和添加壁材料对抹茶面的感官属性（包括其香...

作者聚焦：使用抹茶微胶囊增强食物的风味相互作用 

该方案描述了一种将抹茶与乳清蛋白和羧甲基壳聚糖包埋并微波处理小麦粉以获得颜色稳定的抹茶新鲜面条的方法。

包埋法和微波处理制备色泽稳定的抹茶鲜面

Matcha, as a healthy food additive, has been widely utilized in traditional foods such as noodles, cookies, and bread. However, there are several ...

preparation-matcha-fresh-noodles-with-stable-color-using-embedding

Research

JoVE Journal

Chemistry

Preparation of Matcha Fresh Noodles with Stable Color using Embedding Method and Microwave Treatment

559 次观看.  Tea Research Institute Chinese Academy of Agricultural Sciences. 我对茶和食物的风味相互作用的研究以及茶食品的研究和开发。在面条中添加抹茶微胶囊的想法最初被提出来以防止变色。此外，使用微波和包埋处理可以保留抹茶面的质地或味道。这种技术的主要优点是它使我们能够避免使用复合物，同时仍然保持新鲜抹茶面的天然品质，它还有助于保留抹茶中的活性物质。

视频: 作者聚焦：使用抹茶微胶囊增强食物的风味相互作用 

Preparation of Silica Nanoparticles Through Microwave-assisted Acid-catalysis

Microwave-assisted synthetic techniques were used to quickly and reproducibly produce silica nanoparticle sols using an acid catalyst with nanoparticle diameters ranging from 30-250 nm by varying the reaction conditions. Through the selection of a microwave compatible solvent, silicic acid precursor, catalyst, and microwave irradiation time, these microwave-assisted methods were capable of overcoming the previously reported shortcomings associated with synthesis of silica nanoparticles using microwave reactors. The siloxane precursor was hydrolyzed using the acid catalyst, HCl. Acetone, a low-tan &#948; solvent, mediates the condensation reactions and has minimal interaction with the electromagnetic field. Condensation reactions begin when the silicic acid precursor couples with the microwave radiation, leading to silica nanoparticle sol formation. The silica nanoparticles were characterized by dynamic light scattering data and scanning electron microscopy, which show the materials&#39; morphology and size to be dependent on the reaction conditions. Microwave-assisted reactions produce silica nanoparticles with roughened textured surfaces that are atypical for silica sols produced by St&#246;ber&#39;s methods, which have smooth surfaces.

Silica nanoparticles were prepared using acid-catalysis of a siloxane precursor and microwave-assisted synthetic techniques resulting in the controlled growth of nanomaterials ranging from 30-250 nm in diameter. The growth dynamics can be controlled by varying the initial silicic acid concentration, time of the reaction, and temperature of reaction.

Microwave-assisted synthetic techniques were used to quickly and reproducibly produce silica nanoparticle sols using an acid catalyst with nanoparticle ...

科研

化学

Manufacturing of Three-dimensionally Microstructured Nanocomposites through Microfluidic Infiltration

Microstructured composite beams reinforced with complex three-dimensionally (3D) patterned nanocomposite microfilaments are fabricated via nanocomposite in&#64257;ltration of 3D interconnected microfluidic networks. The manufacturing of the reinforced beams begins with the fabrication of microfluidic networks, which involves layer-by-layer deposition of fugitive ink filaments using a dispensing robot, filling the empty space between filaments using a low viscosity resin, curing the resin and finally removing the ink.&#160;Self-supported 3D structures with other geometries and many layers (e.g.&#160;a few hundreds layers) could be built using this method. The resulting tubular micro&#64258;uidic networks are then infiltrated with thermosetting nanocomposite suspensions containing nanofillers (e.g.&#160;single-walled carbon nanotubes), and subsequently cured. The infiltration is done by applying a pressure gradient between two ends of the empty network (either by applying a vacuum or vacuum-assisted microinjection). Prior to the infiltration, the nanocomposite suspensions are prepared by dispersing nanofillers into polymer matrices using ultrasonication and three-roll mixing methods. The nanocomposites (i.e.&#160;materials infiltrated) are then solidified under UV exposure/heat cure, resulting in a 3D-reinforced composite structure. The technique presented here enables the design of functional nanocomposite macroscopic products for microengineering applications such as actuators and sensors.

Three-dimensional (3D) microstructured composite beams are fabricated through the directed and localized infiltration of nanocomposites into 3D porous microfluidic networks. The flexibility of this manufacturing method enables the utilization of different thermosetting materials and nanofillers in order to achieve a variety of functional 3D reinforced nanocomposite macroscopic products.

通过微流体渗透制备三维微结构纳米复合材料的制造

Microstructured composite beams reinforced with complex three-dimensionally (3D) patterned nanocomposite microfilaments are fabricated via nanocomposite ...

Facile Preparation of Internally Self-assembled Lipid Particles Stabilized by Carbon Nanotubes

We present a facile method to prepare nanostructured lipid particles stabilized by carbon nanotubes (CNTs). Single-walled (pristine) and multi-walled (functionalized) CNTs are used as stabilizers to produce Pickering type oil-in-water (O/W) emulsions. Lipids namely, Dimodan U and Phytantriol are used as emulsifiers, which in excess water self-assemble into the bicontinuous cubic Pn3m phase. This highly viscous phase is fragmented into smaller particles using a probe ultrasonicator in presence of conventional surfactant stabilizers or CNTs as done here. Initially, the CNTs (powder form) are dispersed in water followed by further ultrasonication with the molten lipid to form the final emulsion. During this process the CNTs get coated with lipid molecules, which in turn are presumed to surround the lipid droplets to form a particulate emulsion that is stable for months. The average size of CNT-stabilized nanostructured lipid particles is in the submicron range, which compares well with the particles stabilized using conventional surfactants. Small angle X-ray scattering data confirms the retention of the original Pn3m cubic phase in the CNT-stabilized lipid dispersions as compared to the pure lipid phase (bulk state). Blue shift and lowering of the intensities in characteristic G and G&#39; bands of CNTs observed in Raman spectroscopy characterize the interaction between CNT surface and lipid molecules. These results suggest that the interactions between the CNTs and lipids are responsible for their mutual stabilization in aqueous solutions. As the concentrations of CNTs employed for stabilization are very low and lipid molecules are able to functionalize the CNTs, the toxicity of CNTs is expected to be insignificant while their biocompatibility is greatly enhanced. Hence the present approach finds a great potential in various biomedical applications, for instance, for developing hybrid nanocarrier systems for the delivery of multiple functional molecules as in combination therapy or polytherapy.

We report on a smart application of carbon nanotubes for kinetic stabilization of lipid particles that contain self-assembled nanostructures in their cores. The preparation of lipid particles requires rather low concentrations of carbon nanotubes permitting their use in biomedical applications such as drug delivery.

内部自组装脂质颗粒的简易制备碳纳米管稳定

We present a facile method to prepare nanostructured lipid particles stabilized by carbon nanotubes (CNTs). Single-walled (pristine) and multi-walled ...

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for Cu(II) Through Microwave Pre-Pyrolysis

An environment-friendly technique for synthesizing biomass-based mesoporous activated carbon with high nitrogen-/oxygen-chelating adsorption for Cu(II) is proposed. Bagasse impregnated with phosphoric acid is utilized as the precursor. To pyrolyze the precursor, two separate heating modes are used: microwave pyrolysis and conventional electric-heating pyrolysis. The resulting bagasse-derived carbon samples are modified with nitrification and reduction modification. Nitrogen (N)/oxygen (O) functional groups are simultaneously introduced to the surface of activated carbon, enhancing its adsorption of Cu(II) by complexing and ion-exchange. Characterization and copper adsorption experiments are performed to investigate the physicochemical properties of four prepared carbon samples and determine which heating method favors the subsequent modification for doping of N/O functional groups. In this technique, based on analyzing data of nitrogen adsorption, Fourier transform infrared spectroscopy, and batch adsorption experiments, it is proven that microwave-pyrolyzed carbon has more defect sites and, therefore, time-saving effective microwave pyrolysis contributes more N/O species to the carbon, although it leads to a lower specific surface area. This technique offers a promising route to synthesis adsorbents with higher nitrogen and oxygen content and a higher adsorption capacity of heavy-metal ions in wastewater remediation applications.

Preparation of Biomass-based Mesoporous Carbon with Higher Nitrogen-/Oxygen-chelating Adsorption for CuII Through Microwave Pre-Pyrolysis

Here, we present a protocol to synthesize nitrogen/oxygen dual-doped mesoporous carbon from biomass by chemical activation in different pyrolysis modes followed by modification. We demonstrate that the microwave pyrolysis benefits the subsequent modification process to simultaneously introduce more nitrogen and oxygen functional groups on the carbon.

微波热解法制备了更高氮素/氧螯合吸附的生物物质基介孔碳对 cu (ii) 的研究

An environment-friendly technique for synthesizing biomass-based mesoporous activated carbon with high nitrogen-/oxygen-chelating adsorption for Cu(II) is ...

环境科学

Nanosponge Tunability in Size and Crosslinking Density

We describe a protocol for the synthesis of linear polyesters containing pendant epoxide functionality and their incorporation into a nanosponge with controlled dimensions. This approach begins with synthesis of a functionalized lactone which is key to the pendant functionalization of the resulting polymer. Valerolactone (VL) and allyl-valerolactone (AVL) are then copolymerized using ring-opening polymerization. Post-polymerization modification is then used to install an epoxide moiety on some or all of the pendant allyl groups. Epoxy-amine chemistry is employed to form nanoparticles in a dilute solution of both polymer and small molecule diamine crosslinker based on the desired nanosponge size and crosslinking density. Nanosponge sizes can be characterized by transmission electron microscopy (TEM) imaging to determine the dimension and distribution. This method provides a pathway by which highly tunable polyesters can create tunable nanoparticles, which can be used for small molecule drug encapsulation. Due to the nature of the backbone, these particles are hydrolytically and enzymatically degradable for a controlled release of a wide range of hydrophobic small molecules.

This article describes a process for tuning the size and crosslinking density of covalently crosslinked nanoparticles from linear polyesters containing pendant functionality. By tailoring synthesis parameters (polymer molecular weight, pendant functionality incorporation, and crosslinker equivalents), a desired nanoparticle size and crosslinking density can be achieved for drug delivery applications.

Nanosponge 可调大小和交联密度

We describe a protocol for the synthesis of linear polyesters containing pendant epoxide functionality and their incorporation into a nanosponge with ...

Control and Disposal of Invasive Japanese Knotweed Reynoutria japonica Houtt. Using Microwave Treatment

The study aims to assess the effectiveness of microwave treatment (MWT) at a frequency of 2.45 GHz and a power of 800 W to control Japanese knotweed (Reynoutria japonica Houtt.) using a self-propelled device that was built in the in-house facility. The MWT was applied in the field population of knotweed in July 2022. First, plants were mechanically moved from the area of 1 m2, and next, the cut shoots around 4 cm high were microwave-treated for 25 min, 20 min, and 15 min. The control treatments were: 1) only cut plants and 2) rhizomes dug out to 30 cm deep. The effectiveness of the microwave treatments was observed for the next 11 months by counting the number of newly grown shoots. The results showed that a 25 min MWT was 100% effective in Japanese knotweed loss of vitality, while a 15 min MWT microwave treatment stimulated plant growth by around 50%, compared to controls. Rhizomes were dug out in a separate in vitro experiment for laboratory testing. The rhizomes were categorized by thickness and subjected to a 60 s MWT using a commercial microwave, after which their temperature and vitality were assessed. The temperature of rhizomes following MWT depended on their thickness. Those rhizomes that warmed to temperatures above 42 &#176;C were effectively destroyed. Summing up, the time plants are exposed to microwaves plays a major role in the effectiveness of this method. The longer the exposure to MWT, the better control. The thinner the rhizomes, the more effective the in vitro MWT rhizomes disposal.

This protocol provides a method for microwave control of Japanese knotweed in the field and disposal of dug-up rhizomes in laboratory conditions. The advantages and disadvantages of both methods are discussed. Future research directions are also suggested to optimize the use of microwaves for controlling Japanese knotweed.

The study aims to assess the effectiveness of microwave treatment (MWT) at a frequency of 2.45 GHz and a power of 800 W to control Japanese knotweed ...

Triplet Fusion Upconversion Nanocapsule Synthesis

Triplet fusion upconversion (UC) allows for the generation of one high energy photon from two low energy input photons. This well-studied process has significant implications for producing high energy light beyond a material's surface. However, the deployment of UC materials has been stymied due to poor material solubility, high concentration requirements, and oxygen sensitivity, ultimately resulting in reduced light output. Toward this end, nanoencapsulation has been a popular motif to circumvent these challenges, but durability has remained elusive in organic solvents. Recently, a nanoencapsulation technique was engineered to tackle each of these challenges, whereupon an oleic acid nanodroplet containing upconversion materials was encapsulated with a silica shell. Ultimately, these nanocapsules (NCs) were durable enough to enable triplet fusion upconversion-facilitated volumetric three-dimensional (3D) printing. By encapsulating upconversion materials with silica and dispersing them in a 3D printing resin, photopatterning beyond the surface of the printing vat was made possible. Here, video protocols for the synthesis of upconversion NCs are presented for both small-scale and large-scale batches. The outlined protocols serve as a starting point for adapting this encapsulation scheme to multiple upconversion schemes for use in volumetric 3D printing applications.

This protocol details the synthesis of upconversion nanocapsules for subsequent use in photopolymerizable resins for triplet fusion upconversion-facilitated volumetric 3D printing.

三重融合上转换纳米胶囊合成

Triplet fusion upconversion (UC) allows for the generation of one high energy photon from two low energy input photons. This well-studied process has ...

工程学

氢氧化镍纳米片的微波合成与表征

Effect of Microwave Synthesis Conditions on the Structure of Nickel Hydroxide Nanosheets

A protocol for rapid, microwave-assisted hydrothermal synthesis of nickel hydroxide nanosheets under mildly acidic conditions is presented, and the effect of reaction temperature and time on the material&#39;s structure is examined. All reaction conditions studied result in aggregates of layered &#945;-Ni(OH)2 nanosheets. The reaction temperature and time strongly influence the structure of the material and product yield. Synthesizing &#945;-Ni(OH)2 at higher temperatures increases the reaction yield, lowers the interlayer spacing, increases crystalline domain size, shifts the frequencies of interlayer anion vibrational modes, and lowers the pore diameter. Longer reaction times increase reaction yields and result in similar crystalline domain sizes. Monitoring the reaction pressure in situ shows that higher pressures are obtained at higher reaction temperatures. This microwave-assisted synthesis route provides a rapid, high-throughput, scalable process that can be applied to the synthesis and production of a variety of transition metal hydroxides used for numerous energy storage, catalysis, sensor, and other applications.

作者聚焦:氢氧化镍纳米片的快速微波辅助水热合成 

Nickel hydroxide nanosheets are synthesized by a microwave-assisted hydrothermal reaction. This protocol demonstrates that the reaction temperature and time used for microwave synthesis affects the reaction yield, crystal structure, and local coordination environment.

微波合成条件对氢氧化镍纳米片结构的影响

A protocol for rapid, microwave-assisted hydrothermal synthesis of nickel hydroxide nanosheets under mildly acidic conditions is presented, and the effect ...

包埋法和微波处理制备色泽稳定的抹茶鲜面

副本

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此视频中的章节

Preparation of Silica Nanoparticles Through Microwave-assisted Acid-catalysis

通过微流体渗透制备三维微结构纳米复合材料的制造

内部自组装脂质颗粒的简易制备碳纳米管稳定

微波热解法制备了更高氮素/氧螯合吸附的生物物质基介孔碳对 cu (ii) 的研究

Nanosponge 可调大小和交联密度

Control and Disposal of Invasive Japanese Knotweed Reynoutria japonica Houtt. Using Microwave Treatment

三重融合上转换纳米胶囊合成

微波合成条件对氢氧化镍纳米片结构的影响

微波合成条件对氢氧化镍纳米片结构的影响

微波合成条件对氢氧化镍纳米片结构的影响