Potassium dichromate

About: Potassium dichromate is a research topic. Over the lifetime, 1430 publications have been published within this topic receiving 18967 citations. The topic is also known as: Potassium dichromate(VI) & Chromium potassium oxide.

External application medicine for phlebitis

Abstract: The said medicine for phlebitis is an ointment prepared with the medicinal material potassium dichromate, scallion stalk and castor bean and it has obvious curative effect.

In-situ Synthesis of SnO 2 Quantum Dots/ZnS Nanosheets Heterojunction as a Visible-light-driven Photocatalyst for Degradation of Rhodamine B, Potassium Dichromate and Tetracycline

Abstract: The SnO2 quantum dots (SnO2QDs)/ZnS nanosheets (ZnSNs) heterojunction was fabricated via an in-situ synthetic method at room temperature. Rhodamine B, potassium dichromate, and tetracycline were used to discuss the photocatalytic activities of the as-prepared samples under the visible light illumination. The photocatalytic mechanism of the as-prepared samples was also proposed. The experimental results indicate that the degradation efficiency of the as-prepared SnO2QDs/ZnSNs heterojunction first increases and then decreases with increasing the usage of ZnSNs. When the mass ratio of SnO2QDs to ZnSNs is 1: 2 in 180 min, the asprepared samples have the highest degradation efficiency of 89.1% for rhodamine B, 97.7% for potassium dichromate, and 83.8% for tetracycline, which are much higher than 51.7%, 26.8%, and 0.9% of pure SnO2QDs as well as 37.9%, 87.1%, and 19.1% of pure ZnSNs, respectively. After it is repeatedly degraded for 3 times, it possesses the degradation efficiency of 62.5% for rhodamine B, which increases by 200.5% in comparison with 20.8% of the pure SnO2QDs. Moreover, the enhanced photocatalytic performances of the as-prepared hybrids are attributed to the formation of heterojunction between the SnO2QDs and ZnSNs. In addition, hydroxyl radicals and superoxide anion radicals play major roles during the photocatalytic degradation process, while holes play a minor role.

Chemical etching solution for crystal of iii-v group compound

Abstract: PURPOSE:To provide the titled etching soln contg an alkali dichromate, hydrochloric acid and acetic acid, giving a mirror-finished surface, and having high reproducibility in etching depth CONSTITUTION:This etching soln is an aqueous soln contg an alkali dechromate such as potassium dichromate or sodium dichromate, hydrochloric acid and acetic acid When a crystal of a III-V group compound is etched with the etching soln, the formation of etching pits can be prevented, and a mirror-finished surface can be obtd with high reproducibility in etching depth The shape of the cross-section of the etched crystal is independent of the crystal orientation, so the etching soln can be used well as an etching soln for mesa etching

A Reduced‐scale Method for the Determination of the Dichromate Value (Chemical Oxygen Demand) of Sewage and Trade Effluents

Abstract: A description is given of a convenient and reliable analytical method for the determination of the dichromate value of sewage and trade effluents. The method is more rapid than existing macro-scale procedures and is sufficiently analytically accurate and reproducible for the calculation of trade-waste treatment charges. Oxidation with potassium dichromate is carried out in boiling 50% (vol./vol.) sulphuric acid, with a total reagent volume of 30 ml.