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Hao Y.,Hebei University of Science and Technology | Cao Y.,Hebei University of Science and Technology | Sun B.,Hebei University of Science and Technology | Zhang Y.,Hebei University of Science and Technology | And 3 more authors.
Acta Chimica Sinica | Year: 2012

In this paper, ordered one-dimensional poly (3-hexylthiophene) (P3HT) /CdS/TiO2/ZnO core-shell nanorod arrays were fabricated. Highly ordered and vertically oriented one-dimensional ZnO nanorod arrays were electrodeposited on the indium-tin oxide (ITO) glass substrates. TiO2 sol was deposited on ZnO nanorod array by dip-coating to obtain TiO2/ZnO core-shell nanorod array. CdS nanocrystals were electrodeposited on the TiO2/ZnO core-shell nanorods to fabricate CdS/TiO2/ZnO core-shell nanorod arrays. Then a thin P3HT layer was electrodeposited on the CdS/TiO2/ZnO core-shell nanorod arrays to prepare the photoanode of the nanostructured hybrid solar cell. The photovoltaic performance of the hybrid solar cell was tested, and the mechanism of the solar cell was investigated. Source

Wang J.,Tianjin Polytechnic University | Cheng Z.,Tianjin Polytechnic University | Jia H.,Tianjin Polytechnic University | Zhang H.,Tianjin Polytechnic University | Huang Y.,Tianjin Motimo Membrane Technology Co.
Huagong Xuebao/CIESC Journal | Year: 2014

Comparing with coagulation membrane filtration (C-MF) process, the circulating flocculation membrane filtration (CF-MF) process is a combination of circulating contact flocculation with membrane filtration. The differences of membrane fouling development in the two processes were investigated in this study. SUVA was used as an evaluation index of hydrophilic/hydrophobic properties for organic matters to assess the effect of process variation on SUVA as well as to find relation between SUVA and index of comprehensive membrane fouling. The results indicated that there exists a good liner relationship between SUVA in membrane filtration and membrane fouling. The higher SUVA was, the more serious membrane fouling was. In the optimal operation conditions, SUVA in membrane filtration effluent and coagulation process supernatant were 1.74 L · mg-1 · m-1 and 1.18 L · mg-1 · m-1 for CF-MF process, the removal of organic matters increased by 17% and 29%, comparing with C-MF process, indicating that the removal of hydrophobic organic matters and the control of fouling formation on membrane from them was better for CF-MF than C-MF. Comparing with C-MF process, the CF-MF is more effective for removing organic matters. With coagulant dosing of 6 mg · L-1 and reflux floc concentration of 10 mg · L-1, the removal rate of UV254 and DOC were 58.75% and 49.7% respectively. © All Rights Reserved. Source

Zhang H.,Tianjin Polytechnic University | Li X.-L.,Tianjin Motimo Membrane Technology Co. | Hu X.-Y.,Tianjin Polytechnic University | Chen Y.-B.,Tianjin Polytechnic University | Xiao C.-F.,Tianjin Polytechnic University
Gongneng Cailiao/Journal of Functional Materials | Year: 2012

The mechanochemical treatment of PVC was studied by ball mill and the structure changes of PVC was analyzed. Based on the research, the flat membranes were prepared using the PVC before and after mechanochemical treatment, respectively by thermally induced phase separation (TIPS) method. The structure and properties of membranes were studied by FT-IR, DSC and SEM. Results showed that the mechanochemical treatment eliminated the PVC pomegranate appearance structure which made PVC difficult to be processed, and the perfection of initial micro-crystal of PVC was also reduced. The water flux of the flat membrane built of PVC after mechanochemical treatment by TIPS method reached 693.6 L/(m2·h) which was much higher than that built of PVC before mechanochemical treatment with the value of only 7.1 L/(m2·h), and the fracture strength of the flat membrane was also increased. Source

Tianjin Motimo Membrane Technology Co. | Date: 2012-07-02

A method for making a liquid separation membrane, including: (1) providing a polyvinylidene fluoride liquid separation membrane or polypropylene liquid separation membrane prepared by a thermally induced phase separation method as a substrate membrane, soaking the substrate membrane with water or a weak polar organic liquid to make membrane pores of the substrate membrane filled with the liquid, the soaking time being between 0.5 s and 1 min, and the weak polar organic liquid being indissolvable and compatible with the polyvinylidene fluoride liquid separation membrane or polypropylene liquid separation membrane; (2) coating a casting solution of polyvinylidene fluoride on the surface of the soaked substrate membrane obtained in step (1), and quickly soaking the substrate membrane in a coagulating bath heated to a temperature of 60-100 C. for curing to yield the liquid separation membrane.

Yin Y.-M.,Tianjin Motimo Membrane Technology Co. | Xi X.-J.,Tianjin Motimo Membrane Technology Co. | Dai H.-P.,Tianjin Motimo Membrane Technology Co. | Ke Y.-W.,Tianjin Motimo Membrane Technology Co. | Zhu H.-Z.,Tianjin Polytechnic University
Journal of Tianjin Polytechnic University | Year: 2014

Three kinds of combination processes about sand filter + ultrafiltration UF), the air flotation + UF and coconut shell charcoal filter + UF are developed to treat surface water. The removal performance of different combination techniques for turbidity, algae, UV254, bacteria and other contaminants is investigated, and the membrane fouling in combination techniques is analyzed. The results show that the turbidity can be controlled at around 0.1 NTU and the total number of bacteria is 0 CFU/L for the permeate water of three kinds of combination process. Due to the coconut shell charcoal filter + UF for the removal efficiency of UV254, ammonia nitrogen and algae is superior to the sand filter + UF and air flotation + UF, it reduces the smell and taste in the water. Compared with air flotation + UF and sand filter + UF, the coconut shell charcoal filter + UF is more advantageous to applied to depth treatment of drinking water, owing to the smooth transmembrane pressure(TMP) change trend and stable running. Source

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