A novel 2D/0D C 3 N 5 /Bi 2 WO 6 S-scheme heterojunction with enhanced structural defects has been designed for the efficient elimination of pharmaceutical antibiotics and Cr( vi ). 

In situ construction of a C3N5 nanosheet/Bi2WO6 nanodot S-scheme heterojunction with enhanced structural defects for the efficient photocatalytic removal of tetracycline and Cr(<scp>vi</scp>)

We synthesized a series of carbon-supported atomic metal-N-C catalysts (M-SACs: M=Mn, Fe, Co, Ni, Cu) with similar structural and physicochemical properties to uncover their catalytic activity trends and mechanisms. The peroxymonosulfate (PMS) catalytic activity trends are Fe-SAC>Co-SAC>Mn-SAC>Ni-SAC>Cu-SAC, and Fe-SAC displays the best single-site kinetic value (1.65×105  min-1  mol-1 ) compared to the other metal-N-C species. First-principles calculations indicate that the most reasonable reaction pathway for 1 O2 production is PMS→OH*→O*→1 O2 ; M-SACs that exhibit moderate and near-average Gibbs free energies in each reaction step have a better catalytic activity, which is the key for the outstanding performance of Fe-SACs. This study gives the atomic-scale understanding of fundamental catalytic trends and mechanisms of PMS-assisted reactive oxygen species production via M-SACs, thus providing guidance for developing M-SACs for catalytic organic pollutant degradation.

Activity Trends and Mechanisms in Peroxymonosulfate-Assisted Catalytic Production of Singlet Oxygen over Atomic Metal-N-C Catalysts

Rationally designed tetra (4-carboxyphenyl) porphyrin/graphene quantum dots/bismuth molybdate Z-scheme heterojunction for tetracycline degradation and Cr(VI) reduction: Performance, mechanism, intermediate toxicity appraisement.

A novel organic/inorganic S-scheme heterostructure of TCPP/Bi12O17Cl2 for boosting photodegradation of tetracycline hydrochloride: Kinetic, degradation mechanism, and toxic assessment

S-Scheme MIL-101(Fe) octahedrons modified Bi2WO6 microspheres for photocatalytic decontamination of Cr(VI) and tetracycline hydrochloride: Synergistic insights, reaction pathways, and toxicity analysis

Using Fiber as the based material for photocatalyst particles is favorable for their recovery, thereby avoiding the photocatalyst particles cause secondary pollution to water environment. In this work, the AgBr and Ag3PO4 photocatalyst particles were loaded onto the surface of chitosan fiber (CF) via chelation and in situ anion-exchange method. The photocatalytic results illustrated that the AgBr/Ag3PO4/CF composites displayed the best photocatalytic performance when the mass ratio of Ag3PO4 and AgBr onto the CF was approximately 1:0.15, their degradation rate can reach 98.1% for the methyl orange (MO) solution, this value far exceeded those of pure CF, AgBr/CF composites, and Ag3PO4/CF composites. Besides, the AgBr/Ag3PO4/CF composites also shown excellent durability, after the fifth cycle, they still maintained a decolorization rate of 86.4% for the MO solution, while the Ag3PO4/CF composites maintained a decolorization rate of only 70.7%. Based on these results, we consider that the AgBr/Ag3PO4/CF composites have high practical interest in environmental remediation.

Growth of AgBr/Ag 3 PO 4 Heterojunction on Chitosan Fibers for Degrading Organic Pollutants

The invention relates to a graphene/polyvinyl alcohol modified nonwoven fabric production method, and belongs to the technical field of textile chemistry. The method comprises the following steps: dipping a nonwoven fabric in a graphene oxide/polyvinyl alcohol composite modification solution, drying the nonwoven fabric, and reducing graphene oxide to make the surface of the nonwoven fabric covered with a layer of reduced graphene oxide in order to obtain a nonwoven fabric product with excellent hydrophilic, antibiotic, antistatic and adsorptive functions. The method is suitable for modifying polypropylene fibers, terylene, polyamide, acrylic fibers, polyethylene fibers, polyvinyl chloride fibers, polytetrafluoroethylene, polyphenylene sulfide and other nonwoven fibers, and the nonwoven fabric product obtained in the invention can be used in fields of clothes, home textiles, medical health care, air purification, sewage treatment and military matters. The preparation method has the advantages of simplicity, low cost, wide application range and high application values.

Graphene/polyvinyl alcohol modified nonwoven fabric production method

The invention relates to a preparation method of filter tip fibers for selectively adsorbing benzopyrene and phenol The preparation method comprises the steps of firstly, performing oxidation treatment on graphite to obtain graphene oxide, performing ultrasonic treatment on the graphene oxide to prepare an aqueous solution or preparing a mixed aqueous solution from the graphene oxide with chitosan, next, dipping the fibers into the aqueous solution of the graphene oxide or in the mixed solution of the graphene oxide and the aqueous solution of the chitosan, drying in vacuum for 6 hours at 80 DEG C, and finally, obtaining the filter tip fibers According to the preparation method, the chitosan is evenly attached on the surface of the fibers and a remarkable effect of reducing phenol harmful substances can be achieved Meanwhile, due to strong Pi-Pi interaction between the graphene and the benzopyrene, the graphene modified filter tip is capable of effectively retaining the strong carcinogenic substance benzopyrene in the smoke of cigarette The preparation method is simple, relatively high in efficiency and low in environmental pollution; meanwhile, the fibers can be modified after the graphene and the chitosan are compounded, and the synergistic effect of the graphene and the chitosan in removing arene harmful substances can be developed; as a result, the preparation method has favorable application prospect

Preparation method of filter tip fibers for selectively adsorbing benzopyrene and phenol

The invention relates to a polyphenylene sulfide ultrafine fiber oil-water separation membrane and a preparation method thereof and belongs to the technical field of thin film materials. Through a spray-coating method, the superhydrophobic polyphenylene sulfide superfine fiber membrane having a nano-micro-binary coarse structure on the surface is prepared. The preparation method has simple processes and realizes a low cost. The polyphenylene sulfide ultrafine fiber oil-water separation membrane has high water permeation pressure, large oil flux, good oil-water separation effect, and excellent high temperature resistance, corrosion resistance, air permeability and self-repairability. The superhydrophobic polyphenylene sulfide superfine fiber membrane can be widely used in the fields of membrane distillation, pervaporation and oil-water separation.

Polyphenylene sulfide ultrafine fiber oil-water separation membrane and preparation method thereof

The invention relates to a melt-blowing polyphenylene sulphide non-woven fabric lithium battery diaphragm and a preparation method thereof. The preparation method of the melt-blowing polyphenylene sulphide non-woven fabric lithium battery diaphragm comprises the following steps: drying polyphenylene sulphide aggregates in a melt-blowing polyphenylene sulphide non-woven fabric preparation technology, carrying out melt extrusion, drafting with hot air, cooling, condensing a net, and optimizing technological conditions of hot rolling treatment and heat setting treatment on a polyphenylene sulphide ultrafine fiber net, so that the melt-blowing polyphenylene sulphide non-woven fabric lithium battery diaphragm is obtained. The prepared melt-blowing polyphenylene sulphide non-woven fabric lithium battery diaphragm has the advantages of high melting point, high diaphragm breaking temperature, good fire resistance, low thickness, smooth surface and good chemical and dimension stability, and the prepared melt-blowing polyphenylene sulphide non-woven fabric lithium battery diaphragm has good absorbency, small pore diameter and high porosity, so that requirements of the lithium battery diaphragm are met, safety of a lithium battery is improved, and service life of the lithium battery is prolonged.

Wang Hua

Papers

Growth of AgBr/Ag 3 PO 4 Heterojunction on Chitosan Fibers for Degrading Organic Pollutants

Graphene/polyvinyl alcohol modified nonwoven fabric production method

Preparation method of filter tip fibers for selectively adsorbing benzopyrene and phenol

Polyphenylene sulfide ultrafine fiber oil-water separation membrane and preparation method thereof

Melt-blowing polyphenylene sulphide non-woven fabric lithium battery diaphragm and preparation method thereof