全文获取类型
收费全文 | 50篇 |
免费 | 6篇 |
国内免费 | 20篇 |
专业分类
化学 | 55篇 |
晶体学 | 2篇 |
物理学 | 19篇 |
出版年
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 5篇 |
2018年 | 4篇 |
2017年 | 3篇 |
2016年 | 2篇 |
2015年 | 2篇 |
2014年 | 3篇 |
2013年 | 7篇 |
2012年 | 4篇 |
2011年 | 5篇 |
2010年 | 2篇 |
2009年 | 4篇 |
2008年 | 4篇 |
2007年 | 2篇 |
2006年 | 2篇 |
2005年 | 5篇 |
2004年 | 2篇 |
2003年 | 3篇 |
2002年 | 4篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1999年 | 2篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1993年 | 1篇 |
1985年 | 1篇 |
1979年 | 1篇 |
排序方式: 共有76条查询结果,搜索用时 890 毫秒
41.
Shibin Sun Lihua Dong Zhenjiang Li Yanyan Qiu 《Journal of solid state chemistry》2011,184(8):2190-2195
A novel gas-sensing material and photocatalyst was successfully obtained by decorating Ag/AgCl nanoparticles on the W18O49 nanorods through a clean photochemical route. The as-prepared samples were characterized using combined techniques of X-ray diffractometry, electron microscopy, energy dispersive X-ray spectrometry, and X-ray photoelectron spectroscopy. Gas-sensing measurements indicate that the Ag/AgCl/W18O49 NRs sensors exhibit superior reducing gas-sensing properties to those of bare W18O49 NRs, and they are highly selective and sensitive to NH3, acetone, and H2S with short response and recovery times. The Ag/AgCl/W18O49 NRs photocatlysts also possess higher photocatalytic performance than bare W18O49 NRs for degradation of methyl orange under simulated sunlight irradiation. Possible mechanisms concerning the enhancement of gas-sensing and photocatalytic activities of the Ag/AgCl/W18O49 NRs composite were proposed. 相似文献
42.
以少层六方氮化硼纳米层状材料为载体,通过水溶性盐晶体模板法和离子交换法制备了h-BN稳定AgI/AgCl的三元复合体系。通过XRD、FT-IR、SEM、TEM等手段对样品的结构和形貌进行检测分析,利用UV-Vis DRS测试了样品的吸光性能。可见光光催化降解罗丹明B实验表明,光照24 min,AgI/AgCl/h-BN复合光催化材料对罗丹明B的降解率高达93%,远高于实验合成的大块AgCl、AgCl立方块、AgI/AgCl纳米腰果及文献报道的数值。并且三元材料循环利用4次后,对罗丹明B的降解率几乎保持不变。结合光电化学测试、活性物种捕获和电子自旋共振等实验结果,探讨了复合材料光催化活性和稳定性提高的机理。 相似文献
43.
采用气相扩散-沉积-光还原法制备了可见光响应复合光催化剂Ag/AgCl@NH2-UiO-66.通过X射线衍射(XRD)、电子扫描显微镜(SEM)、X射线能谱(EDS)、紫外可见漫反射光谱及X射线光电子能谱(XPS)等对催化剂的结构进行了表征.结果表明Ag/AgCl@NH2-UiO-66具有优良的光催化活性,可见光条件下(λ≥420 nm)对20 mg·L-1罗丹明的降解效率14 min即可达到98%. 相似文献
44.
掺有浅电子陷阱的AgCl微晶的光电子衰减谱的时间分辨特性 总被引:1,自引:1,他引:0
利用微波吸收技术研究了K4Ru(CN)6浅电子陷阱掺杂剂对立方体AgCl微晶光生电子时间分辨特性的影响。结果表明,掺杂剂的掺杂量以及掺杂位置对乳剂的光生电子时间分辨特性都有影响。掺杂量为245×10-5mol·(molAg)-1,掺杂位置75%Ag时自由电子的衰减最慢,寿命最长。 相似文献
45.
O. V. Ovchinnikov S. V. Chernykh M. S. Smirnov D. V. Alpatova R. P. Vorob’eva A. N. Latyshev A. B. Evlev A. N. Utekhin A. N. Lukin 《Journal of Applied Spectroscopy》2007,74(6):809-816
We have used IR spectroscopy to study the nature of interaction between molecules of the organic dye methylene blue (MB) and
the surface of AgCl(I) microcrystals. We recorded the IR absorption spectra of the organic dye methylene blue in the gas phase,
adsorbed on the surface of AgCl(I) microcrystals, and also in the form of crystal hydrates. The results obtained allowed us
to hypothesize that unsaturated dimethylamino groups and the sulfur atom in the heterocycle of this dye are the most active
in the interaction between methylene blue molecules and the surface of AgCl(I) microcrystals. With the help of IR spectra
of methylene blue crystal hydrates, we confirmed the significant role of OH groups during adsorption of molecules on the surface
of AgCl(I) microcrystals. We suggest the possibility of formation of hydrogen bonds between the anions of the crystal lattice
and the unsaturated dimethylamino groups as well as the sulfur atoms in the heterocycle, by formation of hydrogen bonds with
the OH groups.
__________
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 74, No. 6, pp. 731–737, November–December, 2007. 相似文献
46.
47.
Linlin Sun Chongyang Liu Jinze Li Yaju Zhou Huiqin Wang Pengwei Huo Changchang Ma Yongsheng Yan 《催化学报》2019,40(1):80-94
Exfoliation of bulk graphitic carbon nitride (g-C3N4) into two-dimensional (2D) nanosheets is one of the effective strategies to improve its photocatalytic properties so that the 2D g-C3N4 nanosheets (CN) have larger specific surface areas and more reaction sites. In addition, poly-o-phenylenediamine (PoPD) can improve the electrical conductivity and photocatalytic activity of semiconductor materials. Here, the novel efficient composite PoPD/AgCl/g-C3N4 nanosheets was first synthesized by a precipitation reaction and the photoinitiated polymerization approach. The obtained photocatalysts have larger specific surface areas and could achieve better visible-light response. However, silver chloride (AgCl) is susceptible to agglomeration and photocorrosion. The PoPD/AgCl/CN composite exhibits an extremely high photocurrent density, which is three times that of CN. Obviously enhanced photocatalytic activities of PoPD/AgCl/g-C3N4 are revealed through the photodegradation of tetracycline. The stability of PoPD/AgCl/CN is demonstrated based on four cycles of experiments that reveal that the degradation rate only decreases slightly. Furthermore, ?O2? and h+ are the main active species, which are confirmed through a trapping experiment and ESR spin-trap technique. Therefore, the prepared PoPD/AgCl/CN can be considered as a stable photocatalyst, in which PoPD is added as a charge carrier and acts a photosensitive protective layer on the surface of the AgCl particles. This provides a new technology for preparing highly stable composite photocatalysts that can effectively deal with environmental issues. 相似文献
48.
This paper reports a micro-planar Ag/AgCl quasi-reference electrode (QRE) with long-term stability which is characterized by both long-term potential stability and practical immunity to interference species, and which has been applied for use with an amperometric glucose sensor for plasma glucose. For fabrication, we coated a silver/silver chloride (Ag/AgCl) electrode first with γ-aminopropyltriethoxysilane (γ-APTES) and then with perfluorocarbon polymer (PFCP). Tests demonstrate the new electrode’s ability to remain stable over an 82-day period in 150 mM KCl, and also show its imperviousness to the effects of interference species (1 mM KI and 1 mM KBr), pH, and serum. Furthermore, in tests for glucose concentrations in plasma samples, a good correlation coefficient, 0.954 (n=30, Y=1.02X+0.20), was demonstrated between results obtained with a clinical analyzer and those obtained with an amperometric glucose sensor that used the developed Ag/AgCl QRE, showing that the Ag/AgCl QRE functions well as a reference electrode for plasma samples. 相似文献
49.
In this work quantum-sized CdS nanocrystals were synthesized using a quaternary water-in-oil microemulsion and immobilized onto gold working electrode by self-assembled monolayers techniques. Formaldehyde dehydrogenase was covalently immobilized onto a protecting membrane, which was stratified on part of the semiconductor nanoparticles modified electrode. The covalent enzyme immobilization has been required to improve the stability of the catalytic oxidation of formaldehyde, which occurs after light stimulation of the semiconductor through the electron/hole recombination. A study about the best electrochemical oxidation potentials under different flow conditions was performed. Preliminary sensor stability and interferences tests were also carried out, for a sensitive and selective detection of formaldehyde. A detection limit of 41 ppb of formaldehyde was calculated and an operational stability of 6 h was achieved under flow conditions by means of this novel amperometric biosensor based on FDH-semiconductor hybrid systems, not requiring NAD+/NADH as charge transfer in the enzymatic reaction. 相似文献
50.
《Electroanalysis》2018,30(3):561-570
Complete all‐in‐one multi‐arrayed glutamate (Glut) sensors have been constructed on a silicon‐based micromachined probe composed of micro‐platinum (Pt) working electrodes, a micro‐silver/silver chloride (Ag/AgCl) reference electrode (RE), and a micro‐Pt counter electrode (CE). The OCP shift of the electrodeposited Ag/AgCl on‐probe micro‐reference electrode compared with a Ag/AgCl wire is <0.1 mV/h. The composition ratio of Ag, Cl, and Pt on the electrodeposited on‐probe micro‐reference electrode is observed to be 1.00 : 0.48 : 0.02 analyzed by EDS. The miniaturized amperometric Glut biosensors were constructed on working electrode sites (electrode area: ∼8.5×10−5 cm2) of the microprobe modified with glutamate oxidase (GlutOx) enzyme layers for the selective, fast, and continuous detection of L‐glutamate. The sensor selectivity towards common electroactive interferents has been improved significantly by coating the electrode surface with perm‐selective polymer layers, overoxidized polypyrrole (PPY) and Nafion®. The sensitivity, detection range, and response time of the proposed all‐in‐one Glut biosensors are 204.7±5.8 nA μM−1 cm−2 (N=5), 4.99–109 μM, and 2.7±0.3 sec, respectively and no interferent signals of AA and DA were observed. The sensor can be reused over 19 times of continuous repetitive operation (total measurement time: ∼4 hours) and the sensor sensitivity can retain up to four weeks of storage. 相似文献