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The α-FeOOH nanorods with superb adsorption properties have been synthesised by a facile and scaled-up method. In this approach, KOH solution concentration plays a crucial role in controlling the morphology of α-FeOOH nanaocrystals. It has been demonstrated that the synthesised α-FeOOH nanorods are about 10 nm in diameter and 100 nm in length. The α-FeOOH nanorods have a high specific surface area (333 m2 g− 1), and exhibited super adsorption properties, with maximum adsorption capacity of 104.2 mg g− 1 for Congo red (CR). The as-prepared nanorods show a larger specific surface area than the nanoparticles do, which enhance their adsorption capacity and increase their potential for application in wastewater treatment. The adsorption process of CR on α-FeOOH nanorods was systematically investigated, which was found to obey the pseudo-second-order rate equation and Langmuir adsorption model.

In situ TiBw and La2O3 reinforced titanium matrix composites were successfully fusion welded by the gas tungsten arc welding (GTAW) process and the weldability and feasibility for composites were studied, and uniform and defect free welds were produced with sound welding parameters. Microstructural observations showed that the joint has a distinctly identified weld zone characteristic. In addition, the distribution and size of TiBw in the weld became much more homogeneous and smaller. Moreover, the welded joints exhibited good mechanical properties at ambient temperature and the strength equal to the base metal at elevated temperature. The fracture mechanism of TiBw in the weld also was investigated.

Ni–P coatings were co-deposited with MoS2 nanoparticles on medium carbon steel substrate by electroless plating. The effects of incorporation of MoS2 nanoparticles into the Ni–P coating on the morphology of the coating surface and corrosion properties were investigated. X-ray diffraction pattern and X-ray photoelectron spectroscopy spectra showed that the MoS2 nanoparticles were covered in the nickel phosphor matrix. Corrosion tests were conducted in aqueous 10 wt-%HCl, 10 wt-%NaOH and 3·5 wt-%NaCl using a weight loss method, and in aqueous 3·5 wt-%NaCl by electrochemical measurement for bare substrate, Ni–P coating and Ni–P–(nano-MoS2) composite coating, respectively. The experimental results showed that corrosion resistance of the coating containing MoS2 was slightly lower than that of the coating without MoS2. The corrosion rate of Ni–P–(nano-MoS2) composite coating in HCl aqueous solution was found to be increased owing to the corrosion microcells and high porosity and rougher surface. Ni–P– (...

Tribological characterisation of electrodeposited nickel–titania nanocomposite coatings sliding against silicon nitride in high vacuum was investigated by means of a ball on disk tribometer in a chamber at the pressure less than 5 × 10−3 Pa. An X-ray diffractometer, a scanning electron microscope, a Vickers microhardness tester and a surface profilometer were utilised to characterise the microstructure, morphology and mechanical properties respectively. The experimental results showed that the tribological characterisation of nanocystalline nickel in high vacuum was affected obviously by incorporating titania nanoparticles. Comparatively, the friction coefficient and wear rate of the coatings in vacuum are slightly higher than those in ambient air at room temperature.