JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2020
·Vol. 167
·期 11
·117501
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IF 3.721
Ziyin Yang,Xiao Bai,Chengcheng Qi
NiCo layered double hydroxide (NiCo-LDH) was explored as electrocatalyst for nonenzymatic detection of H2O2, in which NiCo-LDH with different morphologies were synthesized through a hydrothermal method, and then acid-etched NiCo-LDH (E-NiCo-LDH) was obtained via an acid-base reaction. The morphology, composition and structure were characterized by transmission electron microscopy and X-ray diffraction. Electrochemical measurements reveal that E-NiCo-LDH exhibits an excellent electrocatalytic activity toward H2O2 oxidation and the sensor based on E-NiCo-LDH is able to detect H2O2 in a linear range of 2.0 μM to 1.1 mM with a high sensitivity of 728.6 μA mM−1 cm−2 and a low detection limit of 0.2 μM (S/N = 3). This indicated that E-NiCo-LDH is a promising material for electrochemical sensing of H2O2.
研究领域:
材料科学
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电化学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
BMC Oral Health
·
2023
·Vol. 23
·期 1
·1-10
·
IF 2.9
Kim Jae-Heon,Kim Soyeon,Park Young-Seok
Background Hydrogen peroxide (HP) and citric acid (CA), key contributors to toothpaste acidity, can lead to dental loss. This study aimed to compare the amount of abrasion or loss of dentin based on pH, buffering, and concentration of HP and CA in commercial and experimental toothpastes after toothbrushing or immersion. Methods Bovine dentin specimens were randomly assigned to nine solutions. The prepared solutions included two commercial toothpastes (whitening toothpaste [WT] with HP and CA; conventional toothpaste [CT] without HP and CA), reference slurry (RS), two CA solutions (1.92%, CAS1; 0.001%, CAS2), basic solution (7.16% sodium phosphate dibasic [SPDS]), CA phosphate buffer solution (3.58% SPDS and 0.96% CA [CAPB]), HP solution (4%, HPS), and distilled water (DW). Dentin specimens were performed in two treatments: one with only abrasion (10,000 brushings) and one with only immersion (1 h). After treatments, the amount of dentin loss and surface images were measured and observed using noncontact profilometry. Data were analyzed using an one-way analysis of variance and the Tukey test as a post hoc analysis ( p < 0.05). Results WT with pH 5.0 had lower dentin abrasion than CT and RS after brushing but had higher dentin loss than both after immersion. The dentin surfaces of CAS1, CAPB, and WT were damaged after immersion, whereas HPS, CAS2, CT, SPDS, RS, and DW remained intact after soaking. CAS2 and HPS, which had a pH of 5.0 like WT, did not significantly differ from those of DW after brushing. Conclusions WT containing HP and CA did not cause significant dentin abrasion but may cause additional dentin loss even without brushing. After brushing or immersion, the CA concentration may affect the dentin surface more than the HP concentration included in WT. The amount of abrasion or loss of dentin after brushing or soaking can vary based on the composition, concentration, and buffer in the solution, even if the pH of the solution is similar to pH 5.0.
研究领域:
口腔医学
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材料科学
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
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2021
·
IF 3.423
Wenjing Dong,Tianyi Xie,Haiyi Peng,Haishen Ren,Huixing Lin
BiOBr photocatalytic active coatings on bismuth-boron-zinc glass carrier using acid etching synthesis were obtained. The effect of direct and indirect corrosion of the glass layer on the bonding ability of the coatings and the substrate were studied. Specially, the BiOBr photocatalytic coating obtained by acid etching after crystallization of the glass has stronger bonding ability with the glass substrate. This is because the needle-like crystal structure after crystallization can be used as a transition layer to closely combine the glass and the photocatalytic coating. In this paper, the concept of plant cultivation was introduced to explain that the coating prepared by the indirect method had a better bonding force with the substrate. This research solves the traditionally difficult recycling problem of degrading organic pollutants in the form of powder, and the preparation method is simple and suitable for industrial mass production.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
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IF 6.9
Fengyi Wang,Yihao Wang,Jinshuo Zou,Gemeng Liang,Kaiqi Hou,Lining Liu,Zehui Lin,Ci Song,Shengyu Liu,Xingyun Li
Crystal structure and surface modulation of Co 3 O 4 catalyst holds great promise for the improvement of catalytic performance for propane oxidation. In this study, Mn doping in Co 3 O 4 was first adapted to introduce crystal defects. And acid etching was then used to orchestrate the surface properties of Mn doped Co 3 O 4 . The combination of both Mn doping and acid etching resulted in a distorted crystal structure, which significantly activates the Co-O bonds, obviously increasing the exposed active oxygen and enhancing the intrinsic oxidation ability. Consequently, as a catalyst for propane oxidation, Mn-Co 3 O 4 -H facilitates the acetate intermediate generation and its decomposition, resulting in an excellent oxidation activity with propane conversion rate 3.8 times higher than that of the pristine Co 3 O 4 catalyst at reaction temperature of 195 °C. Meanwhile, the catalyst demonstrates a stable hydrothermal performance with negligible deactivation during 30 h on-stream test. This study set an important paradigm for the structure and surface manipulation of Co 3 O 4 catalyst for efficient propane oxidation.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
DENTAL MATERIALS JOURNAL
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2025
·
IF 1.9
Ting YANG,Wenjie HU,Kwok-Hung CHUNG,Fuhua YANG,Hua YANG
Sandblasted with large grits and acid-etched (SLA) surface topography has been a common method of implant surface modification to promote bone-implant integration in titanium-based dental implant manufacturing. However, the acid etching protocols used are various. The aim of this investigation was to validate the effect of different acid-etched treatments of sandblasted titanium surfaces on enhancing osteogenic potential. Five different titanium surface groups were prepared and tested including: i) smooth (Control), ii) sandblasted (SL), iii) sandblasted and acid-etched with H2SO4/HCl mixed solution (SLA/SOCl), iv) sandblasted and acid-etched with H2SO4 solution (SLA/SO), and v) sandblasted and acid-etched with HF solution (SLA/HF). The surface characterization, protein adsorption, and cell behavior were examined to determine the osteogenic potential. Compared with the control group, other surface treated groups showed rougher surface, better wettability, more protein absorption, and cell viability, especially in the SLA/SOCl surface group. The results indicated that SLA surfaces prepared with H2SO4/HCl mixed acid solution provided significant potential to promote osteogenesis.
研究领域:
生物材料学
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口腔医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2025
·
IF 12.1
Zhongwei Zhao,Bingshu Guo,Yun Huang,Xichang Wang,Jin Bao,Chunmei Feng,Xing Li,Mingshan Wang,Yuanhua Lin,Haijun Cao
Aqueous zinc-ion batteries (AZIB) are significantly constrained by the poor stability of Zn anodes in aqueous electrolytes, which is caused by uncontrollable deposition behavior and parasitic reactions. The construction of specific crystalline surfaces represents an effective method for stabilizing Zn anodes. Therefore, a stable Malic acid@Zn (MA@Zn) anode with a highly (101) texture configuration is developed through acid etching. The mechanism of MA selective etching is investigated through theoretical calculations, where Zn atoms detach from the (002) crystal surface due to the strong interaction of MA with the (002) surface, leading to the preferential corrosion of the (002) surface and the formation of a unique (101) texture configuration morphology. This texture is conducive to the MA@Zn anode, as it enhances the affinity of MA@Zn for Zn 2+ and optimizes the electric field distribution on the surface, thereby facilitating a more stable Zn deposition. Consequently, the MA@Zn symmetric battery is subjected to stable cycling for a period exceeding 2400 h at a current density of 5 mA cm −2 . In comparison, the cycle life of the Zn//V 2 O 5 full battery is significantly improved by >6000 cycles, pouch battery also shows better performance.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
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IF 5.816
Ahmad Beyhaqi,Seyed Mohammad Taghi Azimi,Zhihong Chen,Chun Hu,Qingyi Zeng
Exfoliated and plicated g-C 3 N 4 nanosheets (CNsF) were prepared through a thermal-chemical exfoliation in which the bulk g-C 3 N 4 was obtained first under thermal exfoliation, and then was exposed to an acidic etching using hydrofluoric acid under hydrothermal condition. The acidic etching not only exfoliated g-C 3 N 4 nanosheets by disrupting weak van der Waals forces between layers, which led to formation of a monolayer or a few layers of g-C 3 N 4 nanosheets, but also made disordered defects on its surface and created plicated g-C 3 N 4 nanosheets. Under visible-light illumination, the optimized sample (CNsF-6%) showed a hydrogen evolution rate of 54.13 μmol h −1 g −1 (without co-catalyst) and a specific surface area of 121.4 m 2 g −1 , which were about 4.7 and 2.5 times, respectively, higher than pristine g-C 3 N 4 . It also showed remarkably enhanced photocatalytic performance in removing various organic pollutants. This remarkable improvement probably arises from the porous nanosheets and an increased number of active sites resulting from the CNsF, which subsequently enhanced the charge separation efficiency. This work provided an alternative way to obtain highly active g-C 3 N 4 photocatalysts .
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2019
·Vol. 54
·期 10
·7469-7482
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IF 3.442
Wang Yiqi,Shi Haixiao,Li Xiaoguang
Superhydrophobic aluminum (Al) surfaces are desired in many applications and have been widely studied, but some fundamental issues in their fabrication are not yet fully understood. In this study, commonly used HCl solution and organic acid/sulfur reagents were employed for clarifying the phenomena in etching and composition modification. An unstable layer was revealed after HCl etching, which was removable with water flushing, and this layer, consisting of scattered AlCl 3 /Al 2 O 3 particles surrounded by Al 2 O 3 plates with cracks, caused changes in surface appearance from bright to dark. A complete change in surface color corresponded to sufficient etching, and hence, this visible phenomenon could be used to confirm the shortest etching time for achieving desirable superhydrophobicity. Composition modification with dodecanethiol and myristic acid also modified the microstructure through a slight etching mechanism and a synergistic effect was found with the use of their mixture, which led to the finest grains and most abundant carbon chains on the final surfaces. Consequently, the best superhydrophobicity was revealed in static and dynamic experiments with droplets. Finally, using the advantage of flexibility, a superhydrophobic Al sheet was demonstrated to be suitable for subjecting droplets to controlled rolling and coalescence, which could be meaningful for many droplet-related studies.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Yang Chao,Wenxue Ke,Wenyao Zhou,Yu Cui,Jianbin Lin,Ping Liang,Xin He,Chi Zhang
The construction of perovskite/metal oxide heterostructure is a practical approach to enhancing the catalytic activity of perovskite oxides for oxygen evolution reaction (OER). The heterostructures are generally fabricated by physical/chemical deposition with inferior controllability. This work presents a facile acid etching method to construct a LaNiO 3 /NiO heterostructure from La 1–x Sr x NiO 3 perovskite oxides. The selective dissolution of A-site elements in acid facilitates the exsolution of Ni to form NiO nanoflakes on the surface. The phase evolution of La 1–x Sr x NiO 3 upon acid etching is associated with both Sr content and etching duration. For La 0.95 Sr 0.05 NiO 3 etched for 10 h (LSN5–10 h), the obtained catalyst had an overpotential of 385 mV at 10 mA cm –2 in 1 M KOH, 285 mV lower than the pristine LSN5. The turnover frequency (TOF) value obtained at an overpotential of 450 mV is 0.97 S –1 , 2.55 times larger than the pristine LSN5, demonstrating its excellent catalytic efficiency. Long-term tests in 1 M KOH further enhanced the OER performance, which could be ascribed to the formation of highly active NiOOH. The excellent OER performance of the LaNiO 3 /NiO heterostructure is attributed to the efficient charge transfer at the interface and the large surface areas of NiO nanoflakes. This work demonstrates an artificial surface decoration method via surface etching to improve the OER activity and stability of Ni-based perovskite oxides.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2023
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IF 6
Ningning Zhang,Tian Pang,Rui Han,Zhanglei Zhu,Zhen Li
Surface roughness has a significant effect on mineral flotation. In this study, the surface roughness of quartz was altered using HF etching and their values before and after acid etching were quantified using AFM. Anionic flotation experiments with CaCl 2 as activator and sodium oleate (NaOL) as collector, and cationic flotation experiments with dodecyl trimethyl ammonium chloride (DTAC) as collector were carried out for both the raw and acid-etched samples. The results showed that acid etching is beneficial to increase the surface roughness of quartz. The rougher quartz particle has higher recovery and quicker flotation rate during anionic flotation, while lower recovery and slower flotation rate during cationic flotation. The role of surface roughness in the discrepancy of these two flotations was investigated in terms of surface chemistry by X-ray photoelectron spectroscopy, UV spectrophotometer, surface force tensiometer, and zeta potential analyzer. The rougher sample was confirmed to have more unsaturated interfacial active sites, adsorbed more Ca 2+ and NaOL, and exhibited higher hydrophobicity in anionic flotation. Differently, the rougher sample was verified to have less interfacial negative charge, adsorbed less DTAC, and exhibited weaker hydrophobicity in cationic flotation. Taken together, the surface roughness altered by acid etching has different effects on the adsorption capacity of NaOL and DTAC, thus affecting the wettability and floatability of quartz particles inconsistently in anionic and cationic flotation.
研究领域:
矿物加工工程
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2025
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IF 1.6
Zhu Ye’an,Qiu Jialin,Zhang Zimeng,Nie Yidan,Wang Bo,Peng Li,Song Zengkai,Xie Zongbo,Le Zhanggao
The photocatalytic conversion of U(VI) to a lower oxidation state is essential in environmental cleanup, with g-C 3 N 4 being a leading photocatalyst candidate. However, the application of conventional bulk g-C 3 N 4 is limited by its low specific surface area, high rates of photogenerated carrier recombination, and limited utilization of visible light. This study presents a novel synthetic approach, termed “thermal polymerization-acidification-annealing,” that uses urea to prepare modified g-C 3 N 4 samples. Notably, the CN-3 sample has a coral-like porous structure, which significantly increases its specific surface area and reduces the bandgap, thereby improving its photocatalytic performance. Under 100 min of visible light irradiation, the CN-3 sample achieved a 95.5% reduction of U(VI) in solution, which is 2.5 times more efficient than conventional g-C 3 N 4 . The material also demonstrated excellent stability and reusability, maintaining nearly 90% reduction in U(VI) after five consecutive photocatalytic cycles. These results highlight the importance of morphological engineering for enhancing the photocatalytic performance of g-C 3 N 4 and provide a viable strategy for developing efficient and durable materials for environmental and energy applications.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Kaiteng Wang,Jun Zhou,Xiaoyu Deng,Shuo Wu,Ji Wu,Yuan Gao,Ke Deng,Jiaxi Niu,Lei Fu,Kai Wu
Perovskite oxide catalysts are gaining increasing attention for alkaline oxygen evolution reaction (OER) because of their stable crystal structures and inexpensive raw material sources. However, the low conductivity and the low intrinsic catalytic activity in perovskite oxides limit their performance in alkaline OER. Herein, we develop an acid-etched La 0.7 Sr 0.3 Ni 0.2 Co 0.2 Mn 0.2 Fe 0.2 Ru 0.2 O 3-δ perovskite oxide (H + -LSE x O) catalyst based on high entropy strategy and acid treatment engineering. Experimental characterization results indicate that the molar ratio of A-site atoms to B-site atoms (A/B) decreased significantly due to the partial inactive Sr atoms in H + -LSE x O are etched away. Electrochemical testing indicates that the current density of H + -LSE x O can reach 10 mA cm −2 only at an overpotential of 270 mV, which is comparable to the performance of the currently reported highly active OER catalysts (La 0.75 Eu 0.25 FeO 3 mesoporous nanosheets, Ni and Nd co-doped Co 3 O 4 spinel nanosheets). This work emphasizes the synergistic effect of acid treatment engineering to promote the exposure of B-site active sites and high-entropy strategy to regulate the electronic structure of B-site atoms in optimizing the OER performance of perovskite oxides.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）