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The modification of titanium in mesoporous silica for Co-based Fischer–Tropsch catalysts

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8,   Pages 1224-1236 doi: 10.1007/s11705-022-2139-1

Abstract: Ordered SBA-15 mesoporous silica with incorporated titanium was successfully synthesized via a one-potThe results showed that titanium was successfully incorporated into the mesoporous silica framework witha limited amount of titanium (Si/Ti > 20), and the mesoporous structure was retained.However, the increased titanium content inevitably resulted in the formation of anatase TiO 2titanium strengthened the interactions between cobalt species and supports

Keywords： Fischer–Tropsch synthesis     titanium incorporation     mesoporous silica     metal-support interactions     C   

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Anodization of titanium alloys for orthopedic applications

Merve İzmir, Batur Ercan

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 1,   Pages 28-45 doi: 10.1007/s11705-018-1759-y

Abstract:

In recent years, nanostructured oxide films on titanium alloy surfaces have gained significant interestand titanium alloys and summarizes the interactions between anodized titanium alloy surfaces with cellsIt will start with summarizing the mechanism of nanofeatured oxide fabrication on titanium alloys andthen switch its focus on the latest findings for anodization of titanium alloys, including the use offluoride free electrolytes and anodization of 3D titanium foams.

Keywords： titanium alloys     anodization     biocompatibility     orthopedics    

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ENHANCING RAINFALL-RUNOFF POLLUTION MODELING BY INCORPORATION OF NEGLECTED PHYSICAL PROCESSES

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 4,   Pages 553-565 doi: 10.15302/J-FASE-2023519

Abstract:

The growing need to mitigate rainfall-runoff pollution, especially first flush, calls for accurate quantification of pollution load and the refined understanding of its spatial-temporal variation. The wash-off model has advantages in modeling rainfall-runoff pollution due to the inclusion of two key physical processes, build-up and wash-off. However, this disregards pollution load from wet precipitation and the relationship between rainfall and runoff, leading to uncertainties in model outputs. This study integrated the Soil Conservation Service curve number (SCS-CN) into the wash-off model and added pollutant load from wet precipitation to enhance the rainfall-runoff pollution modeling. The enhanced wash-off model was validated in a typical rural-residential area. The results showed that the model performed better than the established wash-off model and the commonly-used event mean concentrations method, and identified two different modes of pollution characteristics dominated by land pollution and rainfall pollution, respectively. In addition, the model simulated more accurate pollutant concentrations at high-temporal-resolution. From this, it was found that 12% of the total runoff contained 80% to 95% of the total load for chemical oxygen demand, total N, and total P, whereas it contained only 15% of the total load for NH4+-N. The enhanced model can provide deeper insights into non-point pollution mitigation.

Keywords： Erhai Lake     field experiment     non-point source     pollution load     rainfall runoff     wash-off model    

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Titanium: The Metal Giant in the New Millennium

Yang Yuchun

Strategic Study of CAE 2002, Volume 4, Issue 3,   Pages 21-31

Abstract:

The rise and development of the extraction of titanium sponge and the manufacture of titanium millThe wide application and important role of metallic titanium, titanium products and titanium-based alloysThe market prospect for titanium industry in the new millennium is forecast and some suggestions on thebetter development of titanium industry are put forward.

Keywords： titanium     titanium sponge     titanium products     titanium industry     market demand and supply of titanium    

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Application of Titanium in Automotive Industry and Metallurgical Technologies for Cutting the Cost ofTitanium materials

Yang Yuchun

Strategic Study of CAE 2005, Volume 7, Issue 8,   Pages 9-17

Abstract:

The advantages offered by titanium materials to the automotive industry including reducing vehicleLow cost production technologies of sponge titanium and titanium materials are introduced and evaluated

Keywords： titanium     titanium materials in automotive manufacture     new metallurgical processing of titanium    

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Methanol to propylene: the effect of iridium and iron incorporation on the HZSM-5 catalyst

Alireza MOHAMMADREZAEI, Sadegh PAPARI, Mousa ASADI, Abas NADERIFAR, Reza GOLHOSSEINI

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 3,   Pages 253-258 doi: 10.1007/s11705-012-0902-4

Abstract: The effect of iridium and iron impregnation of HZSM-5 zeolite on the methanol to propylene reaction (MTP) was investigated. The selectivities of propylene and other hydrocarbons, and the conversion of methanol were compared by performing MTP in a small pilot plant. The results indicate that HZSM-5 zeolite modified by iron and iridium increased propylene selectivity by 6.3% and 8%, respectively. The selectivity of propylene was higher for Ir/H-ZSM-5 than for Fe/H-ZSM-5, where Fe/H-ZSM-5 was more stable than Ir/H-ZSM-5. Analytic techniques, including X-ray diffraction, BET surface area, temperature-programmed desorption of ammonia, and inductively coupled plasma atomic emission spectroscopy, were used to characterize the modified zeolites as well as the parent zeolites.

Keywords： HZSM-5     promoter     iridium     iron     MTP    

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Removal of fluoride from water using titanium-based adsorbents

Zhijian LI, Shubo DENG, Xueying ZHANG, Wei ZHOU, Jun HUANG, Gang YU

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 4,   Pages 414-420 doi: 10.1007/s11783-010-0241-y

Abstract: Three adsorbents including TiO , Ti-Ce, and Ti-La hybrid oxides were prepared to remove fluoride from aqueous solution. The Ti-Ce and Ti-La hybrid adsorbents obtained by the hydrolysis-precipitation method had much higher sorption capacity for fluoride than the TiO adsorbent prepared through hydrolysis. Rare earth (Ce and La) oxides and TiO exhibited a synergistic effect in the hybrid adsorbents for fluoride sorption. The sorption equilibrium of fluoride on the three adsorbents was achieved within 4 h, and the pseudo-second-order model described the sorption kinetics well. The sorption isotherms fitted the Langmuir model well, and the adsorption capacities of fluoride on the Ti-Ce and Ti-La adsorbents were about 9.6 and 15.1 mg·g , respectively, at the equilibrium fluoride concentration of 1.0 mg·L , much higher than the 1.7 mg·g on the TiO . The sorption capacities of fluoride on the three adsorbents decreased significantly when the solution pH increased from 3 to 9.5. The electrostatic interaction played an important role in fluoride removal by the three adsorbents, and Fourier transform infrared (FTIR) analysis indicated that the hydroxyl groups on the adsorbent surface were involved in fluoride adsorption.

Keywords： fluoride adsorption     titanium dioxide     titanium-based adsorbent     sorption mechanism    

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Ti incorporation in MCM-41 mesoporous molecular sieves using hydrothermal synthesis

Shengping WANG, Changqing MA, Yun SHI, Xinbin MA

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 1,   Pages 95-103 doi: 10.1007/s11705-014-1405-2

Abstract: Titanium-containing mesoporous materials (Ti-MCM-41) were obtained by hydrothermal synthesis.In addition, the number of Ti(IV) sites increased as the amount of titanium increased.

Keywords： Ti-MCM-41     mesoporous molecular sieve     acid sites     transesterification     hydrothermal synthesis    

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Photocatalytic reduction of carbon dioxide by titanium oxide-based semiconductors to produce fuels

Xi CHEN, Fangming JIN

Frontiers in Energy 2019, Volume 13, Issue 2,   Pages 207-220 doi: 10.1007/s11708-019-0628-9

Abstract: So far, titanium oxide-based semiconductors have been the most prevalently adopted catalysts in carbonThis mini-review provides a general summary of the recent progresses in titanium oxide-catalyzed photocatalyticLastly, it discusses multi-component hybrid titanium oxide composites.

Keywords： photocatalysis     carbon dioxide reduction     semiconductors     titanium oxide     renewable fuels    

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Machinability of damage-tolerant titanium alloy in orthogonal turn-milling

Tao SUN, Lufang QIN, Junming HOU, Yucan FU

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 3,   Pages 504-515 doi: 10.1007/s11465-020-0586-2

Abstract: The damage-tolerant titanium alloy TC21 is used extensively in important parts of advanced aircraft because

Keywords： orthogonal turn-milling     damage-tolerant titanium alloy     tool life and failure     machined surface integrity    

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Effect of triethylamine treatment of titanium silicalite-1 on propylene epoxidation

Juan XU,Yaquan WANG,Wenping FENG,Yi LIN,Shuhai WANG

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 4,   Pages 478-487 doi: 10.1007/s11705-014-1453-7

Abstract: Titanium silicalite-1(TS-1) treated with triethylamine (TEA) solution under different conditions was

Keywords： titanium silicalite-1     triethylamine     hollow cavity     epoxidation of propylene     catalyst life    

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Pd-Ni nanoparticles supported on titanium oxide as effective catalysts for Suzuki-Miyaura coupling reactions

Dongxu Han, Zhiguo Zhang, Zongbi Bao, Huabin Xing, Qilong Ren

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 24-31 doi: 10.1007/s11705-017-1669-4

Abstract: Small monodispersed Pd-Ni bimetallic nanoparticles were loaded on the surface of titanium oxide nanopowder

Keywords： Pd-Ni bimetallic nanoparticles     nanocatalysis     Suzuki-Miyaura reaction     titanium oxide    

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Effect of sodium ions in synthesis of titanium silicalite-1 on its catalytic performance for cyclohexanone

Pengxu YAO,Yaquan WANG,Teng ZHANG,Shuhai WANG,Xiaoxue WU

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 2,   Pages 149-155 doi: 10.1007/s11705-014-1409-y

Abstract: Titanium silicalite-1 (TS-1) has been hydrothermally synthesized with tetrapropylammonium hydroxide (high molecular weight byproducts deposited in the large TS-1 particles and the loss of the frame-work titanium

Keywords： extra framework Ti     cyclohexanone ammoximation     titanium silicalite-1     sodium ion     crystal size    

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Insight into the effect of surface carboxyl and amino groups on the adsorption of titanium dioxide for

Wenlong Zhang, Xuyang Zhao, Lin Zhang, Jinwei Zhu, Shanshan Li, Ping Hu, Jiangtao Feng, Wei Yan

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1147-1157 doi: 10.1007/s11705-020-1978-x

Abstract: In this study, TiO functionalized with organic groups were prepared to study the effect of carboxyl and amino groups on the adsorption behavior of TiO for the removal of acid red G (ARG) as an anionic dye from aqueous solution. TiO was successfully modified with carboxyl and amino groups by using the hydrolysis method with oxalic acid (OAD, with two carboxyl groups), ethylenediamine (EDA, with two amino groups) and DL-alanine (DLA, with one carboxyl group and one amino group) at low temperature (65 °C) and labeled as OAD-TiO , EDA-TiO and DLA-TiO , respectively. The ARG uptake by the functionalized TiO samples was largely dependent on the functional groups. The interaction between ARG and the functional organic groups on the TiO samples plays an important role in the adsorption process, which leads to the excellent adsorption performance (higher capacity and faster adsorption rate) of the functionalized TiO samples than that of P25 (commercial TiO without modification). Furthermore, there is no obvious loss of the adsorption capacity for the functionalized TiO even after 5 adsorption-desorption cycles, which indicated the good reusability of the modified TiO samples for anionic dye removal from aqueous solution.

Keywords： amino group     carboxylic group     titanium dioxide     ARG     adsorption    

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Enhanced cross-flow filtration with flat-sheet ceramic membranes by titanium-based coagulation for membrane

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1531-x

Abstract:

• Ceramic membrane filtration showed high performance for surface water treatment.

Keywords： Ceramic membrane     Coagulation     Polytitanium chloride     Membrane fouling    

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Title Author Date Type Operation

The modification of titanium in mesoporous silica for Co-based Fischer–Tropsch catalysts

Journal Article

Anodization of titanium alloys for orthopedic applications

Merve İzmir, Batur Ercan

Journal Article

ENHANCING RAINFALL-RUNOFF POLLUTION MODELING BY INCORPORATION OF NEGLECTED PHYSICAL PROCESSES

Journal Article

Titanium: The Metal Giant in the New Millennium

Yang Yuchun

Journal Article

Application of Titanium in Automotive Industry and Metallurgical Technologies for Cutting the Cost ofTitanium materials

Yang Yuchun

Journal Article

Methanol to propylene: the effect of iridium and iron incorporation on the HZSM-5 catalyst

Alireza MOHAMMADREZAEI, Sadegh PAPARI, Mousa ASADI, Abas NADERIFAR, Reza GOLHOSSEINI

Journal Article

Removal of fluoride from water using titanium-based adsorbents

Zhijian LI, Shubo DENG, Xueying ZHANG, Wei ZHOU, Jun HUANG, Gang YU

Journal Article

Ti incorporation in MCM-41 mesoporous molecular sieves using hydrothermal synthesis

Shengping WANG, Changqing MA, Yun SHI, Xinbin MA

Journal Article

Photocatalytic reduction of carbon dioxide by titanium oxide-based semiconductors to produce fuels

Xi CHEN, Fangming JIN

Journal Article

Machinability of damage-tolerant titanium alloy in orthogonal turn-milling

Tao SUN, Lufang QIN, Junming HOU, Yucan FU

Journal Article

Effect of triethylamine treatment of titanium silicalite-1 on propylene epoxidation

Juan XU,Yaquan WANG,Wenping FENG,Yi LIN,Shuhai WANG

Journal Article

Pd-Ni nanoparticles supported on titanium oxide as effective catalysts for Suzuki-Miyaura coupling reactions

Dongxu Han, Zhiguo Zhang, Zongbi Bao, Huabin Xing, Qilong Ren

Journal Article

Effect of sodium ions in synthesis of titanium silicalite-1 on its catalytic performance for cyclohexanone

Pengxu YAO,Yaquan WANG,Teng ZHANG,Shuhai WANG,Xiaoxue WU

Journal Article

Insight into the effect of surface carboxyl and amino groups on the adsorption of titanium dioxide for

Wenlong Zhang, Xuyang Zhao, Lin Zhang, Jinwei Zhu, Shanshan Li, Ping Hu, Jiangtao Feng, Wei Yan

Journal Article

Enhanced cross-flow filtration with flat-sheet ceramic membranes by titanium-based coagulation for membrane

Journal Article