Urea

Manufactured by Beijing Chemical Works

Sourced in China

Urea is a chemical compound with the formula CO(NH2)2. It is a colorless, crystalline solid that is highly soluble in water. Urea is commonly used as a lab equipment product due to its core function as a nitrogen-rich compound that can be used in various chemical and biochemical applications.

Automatically generated - may contain errors

Lab products found in correlation

9 protocols using urea

Nickel-based Electrocatalyst Synthesis

Check if the same lab product or an alternative is used in the 5 most similar protocols

Sodium molybdate (vi) dihydrate (Na₂MoO₄·2H₂O), nickel(ii) chloride hexahydrate (NiCl₂·6H₂O), urea, sodium sulfide nonahydrate (Na₂S·9H₂O) and thiourea (CH₄N₂S) were obtained from Beijing Chemical Works. A 5 wt% Nafion solution was obtained from Du Pont China Holding Co., Ltd. A nickel foam (NF) having a thickness of 0.5 mm was bought from Changsha Lyrun New Materials Co., Ltd., and it (cut as 1.0 cm × 1.0 cm in size) was washed with hydrochloric acid, ethanol and deionized water. All other chemicals were of analytical grade and were purchased from Sinopharm Chemical Reagents Co. All chemicals were used without further purification.

Ge J., Jin J., Cao Y., Jiang M., Zhang F., Guo H, & Lei X. (2021). Heterostructure Ni3S4–MoS2 with interfacial electron redistribution used for enhancing hydrogen evolution. RSC Advances, 11(32), 19630-19638.

+ Open protocol

+ Expand

Preparation of Starch-Cellulose Composites

Check if the same lab product or an alternative is used in the 5 most similar protocols

Microcrystalline cellulose (MCC, about 25 µm) was provided by Sigma-Aldrich (Shanghai) Trading Co., Ltd. (St. Louis, MO, USA). High amylose corn starch (starch, about 12.5 µm) was purchased by Yujing Food Co., Ltd. (Zhengzhou, China) Sodium hydroxide (NaOH) and urea were received from Beijing Chemical Works (Beijing, China). Hydrochloric acid (HCl) was supplied by Sinopharm chemical reagent co. Ltd (Shanghai, China).

Luo Q., Huang X., Gao F., Li D, & Wu M. (2019). Preparation and Characterization of High Amylose Corn Starch–Microcrystalline Cellulose Aerogel with High Absorption. Materials, 12(9), 1420.

+ Open protocol

+ Expand

Betula Mandshurica Bark Extraction and Analysis

Check if the same lab product or an alternative is used in the 5 most similar protocols

Birch bark (BB), Betula Mandshurica Nakai, obtained from the campus of Jilin Agricultural University (Changchun, China) in 2022, was washed with deionized water, dried at 80 °C for 12 h, and crushed. Urea, NaOH, H₂SO₄, HCl, and ethanol were purchased from Beijing Chemical Works (Beijing, China) and used without further purification.
Diphenylcarbazide (CAS: 140-22-7), Methyl orange (MO, CAS: 547-58-0), and Potassium dichromate (Cr⁶⁺, CAS: 7778-50-9) were supplied by Aladdin Chemical (Shanghai) Co., Ltd. (Shanghai, China) and the structural formulas are shown in Figure S1 (Supplementary Material).

Su Y., Shi Y., Jiang M, & Chen S. (2022). One-Step Synthesis of Nitrogen-Doped Porous Biochar Based on N-Doping Co-Activation Method and Its Application in Water Pollutants Control. International Journal of Molecular Sciences, 23(23), 14618.

+ Open protocol

+ Expand

Synthesis of Metal-Modified Carbon Catalysts

Check if the same lab product or an alternative is used in the 5 most similar protocols

Pyrolytic carbon black (CBp) was provided by Hunan Qiheng Environmental Protection, China. Urea (CO(NH₂)₂, 71334-76-4, 99%), ethyl alcohol (EtOH, 141-78-6, 95%), hydrochloric acid (HCl, 7647-01-0, 36%), and sulfuric acid (H₂SO₄, 8014-95-7, 51.9%) were received from Beijing Chemical Factory, China. Ammonium fluoride (NH₄F,14972-90-8, 99.5%), iron nitrate nine hydrate (Fe (NO₃)₃·9H₂O), nickel nitrate hexahydrate (Ni (NO₃)₂·6H₂O), and ascorbic acid (C₆H₈O₆, 2252244-20-3, 99.7%) were provided by Xilong Chemical Industry, China. Zinc oxide (ZnO, 1314-13-2, 99%) and sodium hydroxide (KOH, 1310-58-3, 85%) were supplied by Beijing Chemical Factory, China. Carbon paper, foam nickel, and foam nickel molybdenum were provided by Cyber.

Che K., Zhao M., Sun Y, & Pan J. (2023). In Situ Synthesis of NiFeLDH/A–CBp from Pyrolytic Carbon as High-Performance Oxygen Evolution Reaction Catalyst for Water Splitting and Zinc Hydrometallurgy. Materials, 16(11), 3997.

+ Open protocol

+ Expand

Functionalized Membrane for Dye Removal

Check if the same lab product or an alternative is used in the 5 most similar protocols

Polyacrylonitrile (PAN) ultrafiltration membrane with a molecular weight cutoff (MWCO) of 50,000 Da was supplied by Zhongkeruiyang Membrane Engineering & Technology Co., Ltd. (Beijing, China). Cobalt (II) nitrate hexahydrate, aluminum nitrate nonahydrate, urea, sodium hydroxide, ethylene glycol (EG), ethanol, acetone, HA, EBT, CR, EB, RhB, MB, and MO were all obtained from Beijing Chemical Factory. The molecular structures and weights of the dyes used in this paper are summarized in Table 1. Carboxyl-functionalized multi-walled carbon nanotubes (MWCNTs-COOH) were purchased from Beijing Inno Chem Science & Technology Co., Ltd (Beijing, China). The MWCNTs-COOH had a length of 10–30 μm, an outer diameter of 20–30 nm, and an inner diameter of 5–10 nm. All chemicals were used without further purification.

Li Q., Song P., Yang Y., Li Y., Wang N, & An Q. (2021). CNTs Intercalated LDH Composite Membrane for Water Purification with High Permeance. Nanomaterials, 12(1), 59.

+ Open protocol

+ Expand

Fabrication of PCDTBT and CN-PPV Devices

Check if the same lab product or an alternative is used in the 5 most similar protocols

PCDTBT ((C₄₃H₄₇N₃S₃)_nC₁₂H₁₀, M_w = 20 000–100 000)
and CN-PPV ((C₃₆H₄₆N₂O₄)_n) were both provided by Sigma Chemical
Co., Ltd. Mg(NO₃)₂·6H₂O, Al(NO₃)₃·9H₂O, urea, formamide, and toluene
were all of analytical grade and obtained from Beijing Chemical Factory,
China. SiO₂ (300 nm)/Si wafer and silver paste were provided
by J&K Co., Ltd.

Zheng S., Lu J, & Duan X. (2016). Novel Visible-Light Photodetector Based on Two-Dimensional Confined Electron Donor–Acceptor Co-Assembled Layered Double Hydroxide Ultrathin Films. ACS Omega, 1(6), 1239-1246.

+ Open protocol

+ Expand

Cellulose Acetate Modification Protocol

Check if the same lab product or an alternative is used in the 5 most similar protocols

Cellulose acetate (Mn = 30000, DS = 2.5) was used after drying in the vacuum oven at 70 °C for 24 h caisothiocyanate (FITC), protoporphyrin IX (PpIX), dibutyltindilaurate (DBTDL), N,N’-carbonyldiimidazole (CDI) were purchased from J& K Scientific Ltd. and used as received. N,N’-Dimethylformamide (DMF) was dehydrated by CaH₂ and preserved with 3 Å molecular sieve after distillation. Super-dry dimethyl sulfoxide (DMSO) with molecular sieves was purchased from J& K Scientific Ltd. and used as received. Ammonia (NH₃, 25% in water), diethylamine (NHEt₂), triethylamine (NEt₃), and urea were purchased from Beijing Chemical Works and used as received. Aniline, benzylamine, hydrazine (64%), and histamine were purchased from J& K Scientific Ltd. and used as received. Morpholine, pyrrolidine, and putrescine were purchased from Sigma-Aldrich, Inc. and used as received.

Jia R., Tian W., Bai H., Zhang J., Wang S, & Zhang J. (2019). Amine-responsive cellulose-based ratiometric fluorescent materials for real-time and visual detection of shrimp and crab freshness. Nature Communications, 10, 795.

+ Open protocol

+ Expand

Luminescent Gd2O3:Eu3+ Nanophosphors

Check if the same lab product or an alternative is used in the 5 most similar protocols

Gadolinium
oxide (Gd₂O₃, 99.9%), europium oxide (Eu₂O₃, 99.9%), boric
acid (H₃BO₃, >99.5%), and acetylacetone (C₅H₈O₂, 99%) were bought from Aladdin
Industrial Co. Ltd. (Shanghai, China). Nitric acid (HNO₃, 65%), urea ((NH₂)₂CO, 99%), and ethanol (C₂H₅OH, 98%) were purchased from Beijing Chemical
Works (Beijing, China), and poly(ethylene glycol)-1000 (PEG, 99%)
was obtained from Bioruler Co. Ltd. All of the materials were used
without further purification, unless otherwise stated. Deionized water,
used for all processes, was prepared by the Hitech laboratory water
purification system DW100 (Shanghai Hitech Instruments Co., Ltd.).

Cui S., He X., Wang D., Wang J.X., Pu Y, & Chen J.F. (2019). Tuning the Doping of Europium in Gadolinium Borate Microparticles at Mesoscale Toward Efficient Production of Red Phosphors. ACS Omega, 4(11), 14497-14502.

+ Open protocol

+ Expand

Synthesis of Nanomaterials for Research

Check if the same lab product or an alternative is used in the 5 most similar protocols

Citric acid (99.5%) and urea (99%) were purchased from Beijing Chemical Works. TiO 2 powder (P25, a mixed phase of 80% anatase and 20% rutile; average size 25 nm) was purchased from Degussa. CdSe/ZnS core/shell QDs were purchased from Ocean Nano Tech LLC. All chemicals were used without further purification. The water used in all experiments was purified using a Millipore system.

Sun M., Qu S., Ji W., Jing P., Li D., Qin L., Cao J., Zhang H., Zhao J, & Shen D. (2015). Towards efficient photoinduced charge separation in carbon nanodots and TiO2 composites in the visible region. Physical chemistry chemical physics : PCCP, 17(12).

+ Open protocol

+ Expand

About PubCompare

Our mission is to provide scientists with the largest repository of trustworthy protocols and intelligent analytical tools, thereby offering them extensive information to design robust protocols aimed at minimizing the risk of failures.

We believe that the most crucial aspect is to grant scientists access to a wide range of reliable sources and new useful tools that surpass human capabilities.

However, we trust in allowing scientists to determine how to construct their own protocols based on this information, as they are the experts in their field.

Ready to get started?

Revolutionizing how scientists
search and build protocols!