Photocatalytic degradation is one of the most promising remediation technologies in terms of advanced oxidation processes (AOPs) for water treatment. In this study

novel graphitic carbon nitride/titanium dioxide (g-C

3

N

4

/TiO

2

) composites were synthesized by a facile sonication method. The physicochemical properties of the photocatalystwith different mass ratios of g-C

3

N

4

to TiO

2

were investigated by X-ray diffraction (XRD)

scanning electron microscope (SEM)

transmission electron microscopy (TEM)

N

2

sorption

Fourier transform infrared spectroscopy (FT-IR)

X-ray photoelectron spectroscopy (XPS)

and UV-vis DRS. The photocatalytic performances were evaluated by degradation of methylene blue. Itwas found that g-C

3

N

4

/TiO

2

with amass ratio of 1.5:1 exhibited the best degradation performance. Under UV

the degradation rate of g-C

3

N

4

/TiO

2

was 6.92 and 2.65 times higher than g-C

3

N

4

and TiO

2

respectively. While under visible light

the enhancement factors became 9.27 (to g-C

3

N

4

) and 7.03 (to TiO

2

). The improved photocatalytic activity was ascribed to the interfacial charge transfer between g-C

3

N

4

and TiO

2

. This work suggests that hybridization can produce promising solar materials for environmental remediation.