Removal of chromium (VI) from water by porous carbon derived from corn straw: Influencing factors, regeneration and mechanism

Ultrafast Laser Pulses Enable One-Step Graphene Patterning on Woods and Leaves for Green Electronics

High specific capacitance and high energy density supercapacitor electrodes enabled by porous carbon with multilevel pores and self-doped heteroatoms derived from Chinese date

Hydrothermal carbonization (HTC) is a promising thermochemical process for the conversion of biomass with high moisture content, and therefore, interest in the development of continuous technology is growing. However, the development of continuous HTC systems requires the in-depth understanding of reaction kinetics, heat transfer mechanisms, exothermic or endothermic nature of the reaction, effect of operational parameters, recyclability of process water, and variability in biomass feedstock. The current paper discusses the effects of recyclability of process water and particle size on the product yield. To investigate the water recycling effect, HTC experiments were performed on sawdust using recycled water in a batch reactor. Moreover, to study the particle size effect, 3 small reactors containing specific particle sizes of biomass were placed in a larger reactor simultaneously to ensure consistency in the process condition. The results showed that the process water recycling increases the mass yield an...

Effects of Process Water Recycling and Particle Sizes on Hydrothermal Carbonization of Biomass

Fruit waste (Pulp) decorated CuO NFs as promising platform for enhanced catalytic response and its peroxidase mimics evaluation

In recent years, porous biomass carbon has become a new functional material used as an absorbent and an electrode material. In this study, we present an organic waste conversion achieved through a two-step process: first, fallen phoenix tree leaves were transformed into carbon microspheres via the hydrothermal method; second, a porous carbon material was prepared from these carbon microspheres through an activation process using KOH. The carbon microspheres were analyzed by using several characterization methods, including X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and the Brunauer-Emmett-Teller method. The porous carbon material exhibited excellent supercapacitive performance with specific capacitances of 367 F/g at a current density of 0.5 A/g and 240 F/g at a current density of 20 A/g. The capacitance retention of the material was 91.7% after 2000 charge/discharge cycles at a current density of 20 A/g.

Supercapacitive performance of porous carbon materials derived from tree leaves

The invention discloses a method for preparing a carbon material from phoenix tree leaves. The carbon material prepared through combination of hydrothermal carbonization and multi-step activation presents a honeycomb structure, has a greatly-increased specific surface area and can be used as an adsorption agent and as an electrode material of supercapacitor.

Method for preparing carbon material from phoenix tree leaves

A novel method to prepare ZnO/Ni multilayer thin film used in back electrode for solar cell

The invention discloses a preparation method of straw-core carbon material. The preparation method includes: washing straw, then taking out straw cores, grinding into powder, evenly mixing deionized water, surfactant PVP and the straw core powder, transferring to a hydrothermal reaction kettle, using hydrochloric acid to regulate pH, sealing the hydrothermal reaction kettle, placing into a drying oven, performing heating reaction, cooling, performing suction filtration, washing, and drying to obtain the carbon material. The preparation method has the advantages the surface of the obtained carbon material is rough, a certain amount of irregular carbon microspheres is formed, and high specific surface area and even particle size are achieved.

Preparation method of straw-core carbon material

The invention provides a solar cell composite back reflecting electrode and a preparation method of the solar cell composite back reflecting electrode. ZnO and Ni are compounded, the short-circuit current density and the optical distance of light in a photoelectric conversion layer are increased, and then the composite back reflecting electrode which is excellent in performance is acquired and excellently utilized. Materials used in the solar cell composite back reflecting electrode are cheap and easy to acquire, operation is easy and convenient to conduct, and pollution is not generated.

Zhang Changcun

Papers

Supercapacitive performance of porous carbon materials derived from tree leaves

Method for preparing carbon material from phoenix tree leaves

A novel method to prepare ZnO/Ni multilayer thin film used in back electrode for solar cell

Preparation method of straw-core carbon material

Solar cell composite back reflecting electrode and preparation method thereof