Chin-Jung Lin - Academia.edu (original) (raw)

Papers by Chin-Jung Lin

Applied Surface Science, 2020

This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Applied Surface Science, 2019

Titania mesoporous sea-urchin-like microspheres were successfully synthesized by two-step templat... more Titania mesoporous sea-urchin-like microspheres were successfully synthesized by two-step template-free hydrothermal method. The sea-urchin-like microspheres have TiO 2 anatase phase spines. The size and shape remain unchanged with amorphous TiO 2 in all the microsphere samples. Controlling the spines quantity of seaurchin-like microspheres with different concentrations of NaBH 4 precursor are expected to improve the photocatalytic ability. The 0.8 wt% NaBH 4 precursor showed the highest photocatalytic activity in the degradation of acetaminophen. X-ray absorption spectroscopy results indicated that the surface spines have an anatase phase structure, slight lattice distortion as well as a variation in Ti 3d orbital orientation. The microspheres with different NaBH 4 precursor concentration have a significant effect in the electronic structure and showed a strong correlation to the oxygen defect in the spines and local structural symmetry of TiO 6 octahedra (O h). More detailed spectral analysis in the unoccupied states above the Fermi level strongly points to a photon degradation. Since Ti 3+ strongly influences the surface chemistry of anatase phase, the structure along with the oxygen defect and the Ti 3+ ions in the spines are considered to have an essential role in the photocatalytic process of TiO 2 for the photogenerated electrons and an indication of an increase in the photocatalytic activity.

The spine journal : official journal of the North American Spine Society, Jan 20, 2017

Minimally invasive spine surgery has become increasingly popular in clinical practice, and it off... more Minimally invasive spine surgery has become increasingly popular in clinical practice, and it offers patients the potential benefits of reduced blood loss, wound pain, and infection risk and also diminishes the loss of working time and length of hospital stay. However, surgeons require more intraoperative fluoroscopy and ionizing radiation exposure during minimally invasive spine surgery for localization, especially for guidance in instrumentation placement. In addition, computer navigation is not accessible in some facility-limited institutions. To demonstrate a method for percutaneous screws placement using only the anterior-posterior trajectory of intraoperative fluoroscopy. Technical report; a retrospective and prospective case series. Patients who received posterior fixation with percutaneous pedicle screws for thoraco-lumbar degenerative disease or trauma. We retrospectively reviewed the charts of consecutive 670 patients who received 4072 pedicle screws between December 2010 ...

Chemosphere, 2016

Hollow core-shell mesoporous TiO2 microspheres were synthesized by a template-free solvothermal r... more Hollow core-shell mesoporous TiO2 microspheres were synthesized by a template-free solvothermal route for efficient photocatalytic degradation of acetaminophen. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and Barrett-Joyner-Halenda data revealed a micrometer-sized mesoporous anatase TiO2 hollow sphere with large surface area and efficient light harvesting. For the photocatalytic degradation of acetaminophen in 60 min, the conversion fraction of the drug increased from 88% over commercial Degussa P25 TiO2 to 94% over hollow spheres with about 25% increase in the initial reaction rate. Even after 10 repeated runs, the recycled hollow spheres showed good photodegradation activity. The intermediates generated in the photocatalytic reactions were eventually converted into molecules that are easier to handle. The simple fabrication route would facilitate the development of photocatalysts for the decomposition of environmental contaminants.

Hematology/Oncology and Stem Cell Therapy, 2010

Journal of the Chinese Chemical Society, 2010

In this work, the 1D titania nanorods (Tnr) were successfully prepared from commercial Degussa P2... more In this work, the 1D titania nanorods (Tnr) were successfully prepared from commercial Degussa P25 powders (DP25) by alkaline hydrothermal method and applied to fabricate the composite TiO2 photoanodes for DSSCs. The morphology of the obtained 1D titania nanomaterials is controllable and is dependent on the post heat treatment. Anatase Tnr (a‐Tnr) with diameters of 50‐200 nm and lengths of several hundreds nanomaters was obtained after calcination at 600 °C. The BET surface area was 20 m2/g. For DSSCs study, the composite TiO2 pastes with a range of DP25/Tnr weight ratio were used for photoanodes. It was found that by adding the Tnr, the photoconversion efficiency (η) increases, yet, due to the lower surface area of a‐Tnr, the DSSC efficiency is deteriorated for higher Tnr content. The DSSC performance also largely depends on the thickness of composite TiO2 films. The best efficiency of ∼7.56% (Voc = 0.81V, Jsc = 14.9 mA/cm2, FF = 0.63) was achieved for the D80a20 sample (80% DP25, ...

Water Science & Technology, 2012

The photocatalytic degradation of an organic dye, i.e. reactive blue 19 (RB19), was studied by em... more The photocatalytic degradation of an organic dye, i.e. reactive blue 19 (RB19), was studied by employing different TiO2/zeolite (TZ) photocatalysts, which have TiO2/(TiO2 + zeolite) weight ratios ranging from 20 to 80%, in a continuous flow system. Three light sources including two UV lights (i.e. λmax,254 nm and λmax,365 nm) and natural sunlight were used. The results showed that the decoloring rate of RB19 increased as the amount of TiO2 in the TZ catalyst increased. The photodegradation of RB19 exhibited pseudo-first-order kinetics with respect to the concentration of RB19. Almost 100% of initial RB19 was mineralized under the controlled conditions in this study. And the activities of the prepared photocatalysts were retained after long-term durability experiments. Compared with UV lights (i.e. λmax,254 nm and λmax,365 nm), the decoloring efficiency of RB19 was significantly increased under natural sunlight illumination, which is likely due to the long-wavelength incident light t...

Water Research, 2005

The decline of trichloroethylene (TCE) in a metallic iron-water system results from the combinati... more The decline of trichloroethylene (TCE) in a metallic iron-water system results from the combination of reduction reaction and sorption onto iron surfaces. Sorption, particularly by highly impure iron, accelerates the removal of TCE from the aqueous phase, but delays the prevalence of steady-state conditions. In this case, an overly high value of reaction rate constant in the design of a treatment system would be used. In this work, the effects of an iron surface with 8.0% C, 6.1% O and 0.8% Si separately following HCl-washing and H 2-reducing pretreatment on sorption and reduction rates were examined. The amounts of both aqueous and sorbed TCE were measured using a modified solventextraction method. TCE sorption onto an iron surface, as quantified by the Langmuir sorption maximum, followed the trend H 2-reduced Fe 0 4HCl-washed Fe 0 4untreated Fe 0 (0.887, 0.365 and 0.311 mg/g, respectively). Measurements of the concentration of sorbed TCE revealed that about 34-37% of the initial mass of TCE in the aqueous phase was removed by sorption by H 2-reduced Fe 0 , 16-19% was removed by HCl-washed Fe 0 and 13-16% was removed by untreated Fe 0. A combination of new and previously reported data on cast iron's capacity to sorb TCE revealed a linear relationship between this capacity and the C fraction in the surface of the iron, with the coefficient of determination (r 2) exceeding 0.99. The first-order observed rate constants (k obs) of the reduction of TCE in contact with Fe 0 were obtained from the slope of a plot of total TCE loss rate (ÀdC T =dt) versus the amount of TCE in the aqueous phase (C w) using linear least-squares analysis. The k obs values were 0.080, 0.148 and 0.191 h À1 for untreated, HCl-washed and H 2reduced Fe 0 , respectively. Normalized to iron surface area concentration, the specific rate constants (k SA) were 2.37 Â 10 À3 , 2.31 Â 10 À3 and 5.62 Â 10 À3 h À1 m À2 L, respectively. The results indicated that HCl-washing approximately doubled k obs , primarily because of the increase in the surface area of the iron, and it slightly decreased k SA due to rapid corrosion during the rinsing process. Both the number of reactive sites and the sorption capacity per unit iron surface area through the H 2-reducing pretreatment were increased due to the reduction of iron oxide layer and the carbonization of carbon-containing subjects on the iron's surface. Hence, the H 2 reduction of cast iron promotes the removal of TCE from contaminated water by the concurrent sorption and reduction.

Water Research, 2007

Surface area-normalized rate constants (k SA) of reaction between metallic nanoparticles and redu... more Surface area-normalized rate constants (k SA) of reaction between metallic nanoparticles and reducible contaminants, such as chlorinated hydrocarbons, heavy metals, and nitrate, have been reported to be dramatically increased as compared to that of commercial metallic powder. However, k SA for individual pollutants in previously published data vary by as much as 1-2 orders of magnitude and much of this variability is due to the effect of various sizes. The size dependence of the reactivity of nanoparticles is not yet fully understood; however, yielding nanoparticles with uniform size and without agglomeration during the period of reaction would demonstrate the effect of varying particle size. In this study, resin-supported zerovalent copper with average particle size of 7, 10, 18, 26, and 29, respectively, were successfully synthesized and evidenced no agglomeration during the reaction period of 10 h. The k SA of copper nanoparticles (k n,SA) was 110-120 times higher than that of powdered copper particles (k p,SA) when the copper particle size was about 10 nm. However, for diameters of 18-29 nm, the ratio of k n,SA /k p,SA was around 10-20, indicating that the reactivity of small copper nanoparticles ($10 nm) varies discontinuously. Thus, most variability in previous k SA is attributed to the presence of small nanoparticles.

Water Research, 2006

Differing precursor concentrations, 1.0, 0.1, and 0.01 M FeCl 3 Á 6H 2 O, were performed to produ... more Differing precursor concentrations, 1.0, 0.1, and 0.01 M FeCl 3 Á 6H 2 O, were performed to produce nanoscale Fe 0 and the results were discussed in terms of the specific surface area, particle size and electrochemical properties. The results indicated that the nanoscale Fe 0 prepared by 0.01 M FeCl 3 had absolutely reduced in size (9-10 nm) and possessed the greatest specific surface area (56.67 m 2 g À1). These synthesized nanoscale Fe 0 particles were attempted to enhance the removal of 40 mg-N L À1 unbuffered nitrate solution. The firstorder degradation rate constants (k obs) increased significantly (5.5-8.6 times) with nanoscale Fe 0 prepared by 0.01 M precursor solution ðFe 0 0:01 M Þ. When normalized to iron surface area concentration, the specific rate constant (k SA) was increased by a factor of approximately 1.7-2.4 using Fe 0 0:01 M (6.84 Â 10 À4 L min À1 m À2 for Fe 0 0:01 M , 4.04 Â 10 À4 L min À1 m À2 for Fe 0 0:1 M and 2.80 Â 10 À4 L min À1 m À2 for Fe 0 1 M). The rise of reactivity of the reactive site on the Fe 0 0:01 M surface was indicated by the specific rate constant (k SA) calculation and the i 0 value of the electrochemical test.

Journal of the Chinese Medical Association, 2012

Background: Treatment options for nonunion of the femoral shaft fracture after intramedullary nai... more Background: Treatment options for nonunion of the femoral shaft fracture after intramedullary nail fixation are controversial. The methods of exchanging an existing nail with a larger-sized nail, dynamization, removal of the nail followed by plating, and bone grafting have all been reported. From those options, exchange nailing seems to be the most popular choice. In our study, we used plate augmentation and bone grafting with retention of the nail. The purpose of our study was to evaluate the effectiveness of this method in treating femoral shaft nonunion after open reduction and internal fixation with intramedullary nail fixation. Methods: Between January 2003 and December 2009, 22 patients who had nonunion after open reduction and internal fixation with intramedullary nail for femoral shaft fracture were included in our study. There were 13 men and nine women participants, with a mean age of 34.3 years (range, 17e77 years). The mean period of nonunion after surgery was 20.0 months (range, 7e63 months). The patients were classified into three groups, atrophic, oligotrophic, and hypertrophic. We retained the nail and performed plate augmentation for all patients, with simultaneous autologous bone grafting as indicated. We followed up on all patients with plain film examination, and to assess functional recovery status to determine osseous union condition. Results: All 22 of the patients achieved postoperative bony union uneventfully at a mean time of 22.1 weeks (range, 12e40 weeks). The mean operative time was 105 minutes (range, 60e150 minutes), and the mean blood loss was 340 ml (range, 150e700 ml). All of the patients could walk bearing full weight without pain within 3 months. There were no significant complications such as broken hardware, implant back-out, axial or rotational malalignment, or deep infections. Conclusion: Plate augmentation with retention of the nail with autologous bone grafting may be an effective and reliable alternative in treating nonunion of the femoral shaft fracture after open reduction and internal fixation with intramedullary nail.

Journal of Power Sources, 2011

Journal of Hazardous Materials, 2004

Bimetallic particles are extremely interesting in accelerating the dechlorination of chlorinated ... more Bimetallic particles are extremely interesting in accelerating the dechlorination of chlorinated organics. Four noble metals (Pd, Pt, Ru and Au), separately deposited onto the iron surface through a spontaneous redox process, promoted the TCE dechlorination rate, and the catalytic activity of the noble metal followed the order of Pd Ru > Pt > Au. This order was found to be dependent on the concentrations of adsorbed atomic hydrogen, indicating that the initial reaction was cathodically controlled. Little difference in the distribution of the chlorinated products for the four catalysts (cis-DCE: 51%; 1,1-DCE: 27%; trans-DCE: 15% and VC: 7%) was observed. The chlorinated by-products accumulated in both Pt/Fe and Au/Fe (10.3% and 2.5% of the transformed TCE, respectively), but did not accumulate in Pd/Fe and Ru/Fe. Ru/Fe was further examined as an economical alternative to Pd/Fe. The 1.5% Ru/Fe was found to completely degrade TCE within 80 min. Considering the expense, the yield of chlorinated products and the lifetime of a reductive material, Ru provides a potential alternative to Pd as a catalyst in practical applications.

Journal of Hazardous Materials, 2005

Uncatalyzed and catalyzed nanoscale Fe 0 systems were employed for the denitrification of unbuffe... more Uncatalyzed and catalyzed nanoscale Fe 0 systems were employed for the denitrification of unbuffered 40 mg N L −1 nitrate solutions at initial neutral pH. Compared to microscale Fe 0 (<100 mesh), the efficiency and rate of nitrate removal using uncatalyzed and catalyzed nano-Fe 0 were highly promoted, in which the maximum promoted rate was obtained using copper-catalyzed nano-Fe 0 (nano-Cu/Fe). Nitrate first-order degradation rate constants (k obs) decreased significantly (>70%) with aged nano-Fe 0 and aged nano-Cu/Fe, and were recovered with NaBH 4 as reductants at levels of about 85 and 75%, respectively. Activation energies (E a) of nitrate reduction over the temperature range of 10-60 • C were 42.5 kJ mol −1 for microscale Fe 0 , 25.8 kJ mol −1 for nano-Fe 0 and 16.8 kJ mol −1 for nano-Cu/Fe. Unlike microscale Fe 0 , the kinetics of denitrification by nano-Fe 0 and nano-Cu/Fe began to show characteristics of mass transport in addition to chemical reaction control. Ammonium was the predominant end product in all the systems. However, as for nitrite, 40% of the degraded nitrate persisted in the nano-Cu/Fe system. Thus, relative to nano-Cu/Fe, nano-Fe 0 is a potential reductant for denitrification of groundwater as far as toxic nitrite generation is concern.

Journal of Environmental Engineering, 2005

Designing a reclaimed water system provides an economically and environmentally favorable method ... more Designing a reclaimed water system provides an economically and environmentally favorable method for disposing of wastewater. However, some critical influences on on-site reclaimed water systems, such as limited building area, often limit the effectiveness of conventional treatment methods. This work established a compact and inexpensive electrocoagulation process with a capacity of 28 m 3 / day to reclaim domestic greywater for human noncontact usage. The total unit cost of on-site domestic greywater reuse was U.S. $ 0.27/ m 3 , which was below the local potable water rate. Moreover, the treatment facility required an area of 8 m 2. Both unit cost and required area in this work are lower than those reported in the literature. The experimental results support the feasibility of the on-site reuse of greywater in high-rise buildings.

Chemosphere, 2009

A Pd/Sn bimetallic nanoparticles resin (nano-Pd/Sn/resin) was successfully synthesized for reduct... more A Pd/Sn bimetallic nanoparticles resin (nano-Pd/Sn/resin) was successfully synthesized for reductive transformation of aqueous trichloroethylene (TCE). The physicochemical properties of the prepared resin were characterized using scanning electron microscopy, energy dispersive X-ray spectroscopy, N 2 isothermal sorption at and X-ray photospectroscopy. The surface-area-normalized rate constants (k SA) of Sn particles in the nanoscale range (50-100 nm) were 4.5 times larger than the k SA for powdered Sn (0.04 mm). After depositing 1 wt% Pd onto nano-Sn surface, k SA was further enhanced by about a factor of 2. Groundwater constituents such as sulfide nitrate and dissolved oxygen had significant negative effects on the rate of TCE degradation by the nano-Pd/Sn/resin. A wet-chemical method regeneration method was observed to effectively restore the reactivity of the poisoned nano-Pd/Sn/resin after dipping in sulfide solution for 2 d. In all cases, less than 0.5% of the degraded TCE appeared as chlorinated byproducts including the three dichloroethene isomers. The nano-Pd/Sn/resin technique performs well in transforming TCE into nontoxic hydrocarbons, as compared with other published methods.

Chemical Communications, 2008

A facile process is introduced to flake high aspect-ratio anodic TiO 2 nanotube (TiNT) arrays off... more A facile process is introduced to flake high aspect-ratio anodic TiO 2 nanotube (TiNT) arrays off Ti substrates and then chemically remove the bottom caps to obtain open-ended TiNT films that exhibit high activity to photocatalytic degradation of methylene blue and efficient hydrogen production from photoelectrocatalytic water splitting.

Catalysis Letters, 2007

The CeO 2-Co 3 O 4 binary oxide was prepared by impregnation of the high surface area Co 3 O 4 su... more The CeO 2-Co 3 O 4 binary oxide was prepared by impregnation of the high surface area Co 3 O 4 support (S.A. = 100m 2 g)1) with cerium nitrate (20 wt% cerium loading on Co 3 O 4). Pretreatment of CeO 2-Co 3 O 4 binary oxide was divided both methods: reduction (under 200 and 400°C, assigned as CeO 2-Co 3 O 4-R200 and CeO 2-Co 3 O 4-R400 and calcination (under 350 and 550°C, assigned as CeO 2-Co 3 O 4-C350 and CeO 2-Co 3 O 4-C550). The binary oxides were investigated by means of X-ray diffraction (XRD), nitrogen adsorption at)196°C, infrared (IR), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS) and temperature programmed reduction (TPR). The results showed that the binary oxides pretreatment under low-temperatures possessed larger surface area. The cobalt phase of binary oxides also was transferred upon the treating temperature, i.e., the CeO 2-Co 3 O 4-R200 binary oxide exhibited higher surface area (S.A. = 109m 2 g)1) and the main phase was CeO 2 ,Co 3 O 4 and CoO. While, the CeO 2-Co 3 O 4-R400 binary oxide exhibited lower surface area (S.A. = 40m 2 g)1) and the main phase was CeO 2 , CoO and Co. Apparently, the optimized pretreatment of CeO 2-Co 3 O 4 binary oxide can control both the phases and surface area.

Electrochemistry Communications, 2010