Ultra-low charge transfer resistance carbons by one-pot hydrothermal method for glucose sensing

Abstract

Hydrothermal carbon (HTC) is typically welldispersed, but it remains a great challenge for HTC to become conductive. Co-doping with heteroatoms has been confirmed to be an effective strategy to significantly promote the electrical conductivity of carbon. Moreover, there is no simple and green method to construct sensitive HTC based electrochemical biosensors until now. In this paper, N and S dualdoped carbon (NS-C) with ultra-low charge transfer resistance is easily synthesized from L-cysteine and glucose in a hydrothermal reaction system. The morphology, structural properties and electrochemical properties of the as-prepared NS-C are analyzed. In comparison with the undoped hydrothermal (UC) modified glassy carbon electrode (GCE), the charge transfer resistance of UC (476 Ω , indicating a high affinity of glucose oxidase to glucose. These results demonstrate that the hydrothermal method is an effective way for preparing high electrical conductivity carbon with excellent performances in biosensor application.

Ultramicroporous carbon granules with narrow pore size distribution for efficient CH4 separation from coal‐bed gases

“…The peaks centered at 1350 and 1580 cm −1 correspond to the D and G band, respectively (Figure 1I). 35 The D band represents the subsistent disorder carbon structures, and the G band corresponds to the vibration of sp 2 ‐hybridized C atoms in the graphitic layer. The peak intensity ratio of D and G bands ( I D / I G ) is regarded as an index of the graphitization degree 18 : the high I D / I G value for GOC‐4 indicated that a higher number of defects were generated with increased KOH/GOCs ratios.…”

Impact of High-Frequency Traveling-Wave Magnetic Fields on Low-Conductivity Liquids: Investigation and Potential Applications in the Chemical Industry

“…In traditional methods, the utilization of concentrated acids or alkalis in industrial processes necessitates the use of equipment capable of withstanding high temperatures, pressures, and corrosive environments. However, achieving adequate stirring under these conditions poses a challenge, making large-scale reactor production technically intricate and costly [8][9][10][11]. To address these issues, high-frequency travelingwave magnetic field drive technology offers a solution by enabling non-contact stirring and heating of the electrolyte within enclosed reactors.…”

Carbon Microspheres with Cr(VI) Adsorption Performance were Prepared by In-situ Hydrothermal Carbonization Method

“…Biomass can be pyrolyzed under anaerobic or oxygen-limited conditions to obtain carbonrich, highly aromatic, and porous solid biochar materials [11], which possess abundant pore structures, a large specific surface area, and rich oxygen-containing functional groups on their surface. Biochar materials also exhibit excellent optical, electrical, mechanical, and chemical properties, finding wide applications in the fields of environment and energy [11][12][13][14][15]. The methods for preparing biochar materials include the template method [11], chemical vapor deposition (CVD) [12], high-temperature pyrolysis [13], and hydrothermal carbonization [14][15][16].…”

“…Biochar materials also exhibit excellent optical, electrical, mechanical, and chemical properties, finding wide applications in the fields of environment and energy [11][12][13][14][15]. The methods for preparing biochar materials include the template method [11], chemical vapor deposition (CVD) [12], high-temperature pyrolysis [13], and hydrothermal carbonization [14][15][16]. Among them, hydrothermal carbonization is an exothermic reaction in which carbohydrates are used as raw materials and water serves as the reaction medium.…”