Using titanium dioxide/carbon nanotubes to remove humic acids in water Using titanium dioxide/carbon nanotubes to remove humic acids in water
Dept. of Civil Engineering, National Chi Nan University, 1, University Rd., PuLi, NanTou, Taiwan
Adv. Mater. Lett., 2016, 7 (2), pp 95-97
DOI: 10.5185/amlett.2016.6100
Publication Date (Web): Jan 04, 2016
Copyright © IAAM-VBRI Press
E-mail: yptsai@ncnu.edu.tw, chi813@gmail.com
This study used multi-walled carbon nanotubes (MWCNTs), TiO2 and their mixture (TiO2/CNT) to remove humic acids (HA) in water. The thermodynamic parameters with respect to the adsorption of MWCNTs, including free energy of adsorption (ΔG0), enthalpy (ΔH0), and entropy (ΔS0) changes, are further calculated in the study. The ΔH0 data showed the adsorption of HA onto MWCNTs is an endothermic physisorption. The ΔG0 data indicates the adsorption of HA onto MWCNTs was spontaneous and thermodynamically favorable. Photocatalytic experiments showed 60 mgl-1 of HAs were completely degraded and mineralized as CO2 after 5 h UV irradiation by 0.8 gl-1 of TiO2, indicating the efficiency of TiO2 for the removal of HA is better than CNTs. The experiments of TiO2/CNT indicated the photocatalytic efficiency of TiO2 in the presence of CNTs was not improved, even worse than TiO2 alone. However, the photocatalytic efficiency of TiO2/CNT mixture became better than TiO2 alone due to the supply of oxygen by aeration, ascribing to the reason that the provided oxygen might be adsorbed on the surface of CNTs and accept e- as well as form •O2-, which also leads to the formation of •OH- in the system.
Advanced Materials Research and Innovation Priorities for Accomplishing the Sustainable Development Goals
Contemporary Advances in Humidity Sensing Materials, Methods, and Performances
Roles of the Debye Length and Skin Depth in the Characterization of Space Charge Interactions in Semiconductor Nanoparticles
Antifungal Activity of Iron-gold and Cobalt-gold co-doped ZnO Nanoparticles
Adsorption and Thermodynamic Parameters of Activated Carbon-Diazepam Systems in Simulated Gastric Fluid
Synthesis, Impedance and Current-Voltage Spectroscopic Characterization of Novel Gadolinium Titanate Nano Structures
Removal of Toxic Dyes from Industrial Waste Water using Chitosan Grafted Itaconic Acid Nanocomposites
Structural, Optical and dielectric properties of Sr doped LaVO4
Design, 3D Development and Finite Element Analysis of Cylindrical Mesh Cage Bioimplants from Biometals
Advancements in Materials Technology for Accomplishing Sustainable Development Goals
A Review for Luminescence Property of Materials, Its Detection and Probabilities for Embedding of Luminescence with MEMS Technology
A Review on Low-Cost Adsorbents for Cadmium Pollutant Removal from Industrial Effluents
Study of Applications of Radial Basis Function Network in Forecasting
Simulation of LPG Pressure Vessel under Fire Engulfment
Strength Analysis of Friction Stir Welding (FSW) Joint Under Minimize Rotation Speed of FSW Tool
Formation of Pure In2O3 pallets for OLED Application
Study of Soil Nitrogen Level and Splitting on Nutrient Uptake around the Industries of Chhattisgarh, India